1 | "use strict";
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2 |
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3 | var progressVal = 0;
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4 |
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5 | var show_progress = 5;
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6 |
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7 | var start_hist_delay = 1000; // used to be 4000
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8 | var mini_delay = 300;
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9 |
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10 |
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11 | //var hasLocalStorage = (typeof(Storage) !== "undefined"); // ****
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12 | var hasLocalStorage = false;
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13 |
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14 | var quantHSLHistogramArray;
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15 |
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16 | //var saveOnServer=true;
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17 | var saveOnServer=false;
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18 | var retrieveFromServer=true;
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19 |
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20 |
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21 | function runlength_encode(int_array) {
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22 |
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23 | var array_len = int_array.length;
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24 |
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25 | if (array_len<2) {
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26 | console.warn("runlength_encode(): unable to run-length encode array of length " + array_len);
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27 | console.warn("returning null");
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28 | return null;
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29 | }
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30 |
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31 | var int_array_rle = new Array();
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32 |
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33 |
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34 | var lock_val=int_array[0];
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35 | var next_val=int_array[1];
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36 | var i = 1;
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37 |
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38 | while (i<array_len) {
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39 | var c=1;
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40 | while (next_val==lock_val) {
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41 | c++;
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42 | var next_pos = i+c-1;
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43 | if (next_pos<array_len) {
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44 | next_val = int_array[next_pos];
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45 | }
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46 | else {
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47 | // hit end of array
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48 | break;
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49 | }
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50 | }
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51 | // come out of a run-length sequence of same val
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52 | // next_val is one past the run-length sequence
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53 |
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54 | int_array_rle.push(c);
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55 | int_array_rle.push(lock_val);
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56 |
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57 | i+=c;
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58 |
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59 | if (i<array_len) {
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60 | lock_val = next_val;
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61 | next_val = int_array[i];
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62 | }
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63 | else {
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64 | break;
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65 | }
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66 | }
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67 |
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68 | return int_array_rle;
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69 | }
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70 |
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71 |
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72 |
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73 | function runlength_decode(int_array_rle) {
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74 |
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75 | var array_rle_len = int_array_rle.length;
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76 |
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77 | if (array_rle_len<2) {
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78 | console.warn("runlength_decode(): unable to run-length decode array of length " + array_rle_len);
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79 | console.warn("returning null");
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80 | return null;
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81 | }
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82 |
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83 | var int_array = new Array();
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84 | for (var i=0; i<array_rle_len; i+=2){
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85 | var rep = int_array_rle[i];
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86 | var val = int_array_rle[i+1];
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87 | for (var r=0; r<rep; r++) {
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88 | int_array.push(val);
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89 | }
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90 | }
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91 |
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92 | return int_array;
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93 | }
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94 |
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95 |
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96 |
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97 | function arrays_identical(int_array1, int_array2) {
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98 |
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99 | var array_len1 = int_array1.length;
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100 | var array_len2 = int_array2.length;
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101 |
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102 | if (array_len1 != array_len2) {
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103 | console.warn("arrays_identical(): array lengths differ, array1("+array_len1+") vs array2(" + array_len2 + ")");
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104 | return false;
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105 | }
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106 |
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107 | var all_ident = true;
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108 |
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109 | for (var i=0; i<array_len1; i++){
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110 | if (int_array1[i] != int_array2[i]) {
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111 | all_ident = false;
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112 | break;
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113 | }
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114 | }
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115 |
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116 | return all_ident;
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117 | }
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118 |
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119 |
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120 | function drawImage(imageObj, canvasId) {
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121 | var imgCanvas = document.getElementById(canvasId),
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122 | context, imageData, data,
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123 | imageX = 0, imageY = 0,
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124 | imageWidth = imageObj.width,
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125 | imageHeight = imageObj.height;
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126 |
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127 | context = imgCanvas.getContext('2d');
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128 | context.drawImage(imageObj, imageX, imageY, imageWidth, imageHeight);
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129 | imageData = context.getImageData(imageX, imageY, imageWidth, imageHeight);
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130 |
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131 | return imageData;
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132 | }
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133 |
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134 |
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135 |
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136 | function createHSLHistogramFromCanvasData(imageData, imageWidth, imageHeight, quant)
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137 | {
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138 | var i;
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139 |
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140 | var outputLength = quant * quant * quant;
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141 | var outputArray = new Array(outputLength);
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142 | for (i=0; i<outputLength; i++) {
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143 | outputArray[i] = 0;
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144 | }
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145 |
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146 | var total = 0.0;
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147 |
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148 | var log2 = Math.log(2);
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149 |
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150 | //calculate value to shift by (log base 2)
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151 |
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152 | var shift_sat = Math.floor(Math.log(quant)/log2);
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153 | var shift_hue = Math.floor(Math.log(quant*quant)/log2);
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154 |
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155 | //console.log("bit-shift sat = " + shift_sat);
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156 | //console.log("bit-shift hue = " + shift_hue);
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157 |
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158 | var data = imageData.data;
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159 |
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160 | //Loop through each pixel
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161 | var y,p;
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162 | for (y=0,p=0; y<imageHeight; y++) {
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163 | var x;
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164 | for (x=0; x<imageWidth; x++,p+=4) {
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165 | // convert 4 byte data value into a colour pixel
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166 | var rgb_c = new RGBColour(data[p],data[p+1],data[p+2],data[p+3]/255.0);
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167 | var hsl = new rgb_c.getHSL();
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168 |
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169 | // express h,s and b in the range 0..1
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170 |
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171 | var h = hsl.h / 360.0;
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172 | var s = hsl.s / 100.0;
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173 | var b = hsl.l / 100.0;
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174 |
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175 | var result = (Math.floor(h * (quant - 1)) << shift_hue)
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176 | | (Math.floor(s * (quant - 1)) << shift_sat)
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177 | | Math.floor(b * (quant - 1));
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178 |
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179 | //number of opaque pixels
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180 | var count = hsl.a; // 'a' is naturally in the range 0..1
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181 |
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182 | //add to the total number of opaque pixels
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183 | total += count;
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184 |
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185 | //add the frequency of each colour to the histogram
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186 | outputArray[result] += count;
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187 | }
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188 | }
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189 |
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190 | if (total == 0) {
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191 | // entire image must have been blank
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192 | // make total '1' to stop NaN being generated
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193 | total = 1;
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194 | }
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195 |
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196 | //Normalise the histogram, based on the number of opaque pixels
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197 | for (i=0; i<outputArray.length; i++) {
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198 | outputArray[i] = outputArray[i] / total;
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199 | }
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200 |
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201 | return outputArray;
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202 | }
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203 |
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204 |
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205 | function createHSLHistogram(imageObj, quant)
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206 | {
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207 | if (!$('#hsl_canvas').length) {
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208 | $('<canvas>', {id: 'hsl_canvas'}).hide().appendTo('body');
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209 | }
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210 |
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211 | var imageData = drawImage(imageObj,'hsl_canvas');
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212 |
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213 | var outputArray = createHSLHistogramFromCanvasData(imageData,imageObj.width,imageObj.height,quant);
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214 |
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215 | /*
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216 | if (saveOnServer) {
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217 | console.log("Saving HSV quantized histogram on server: " + imageObj.title.toLowerCase())
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218 | //console.log("outputArray = " + JSON.stringify(outputArray));
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219 |
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220 | var jsonFilename = imageObj.title.toLowerCase() + ".json";
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221 | var data = { jsonFilename: jsonFilename, jsonData: JSON.stringify(outputArray)};
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222 |
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223 | console.log("Saving colour histogram data for " + imageObj.title.toLowerCase());
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224 | $.ajax({
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225 | type: "POST",
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226 | url: "../similarity-2d/save-json-data.jsp",
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227 | data: data
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228 | });
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229 | }
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230 | */
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231 |
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232 | return outputArray;
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233 | }
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234 |
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235 | var flag_comparison_array = Array(2);
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236 | var clicked_on_count = 0;
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237 |
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238 | function quantizedColourHistogramComparison(quant_colour_hist1,quant_colour_hist2)
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239 | {
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240 | // Assumes both histograms are of the same length
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241 |
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242 | var i;
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243 | var quant_product = 0.0;
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244 |
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245 | //Loop through and compare the histograms
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246 | for (i=0; i<quant_colour_hist1.length; i++) {
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247 | //take the overlap
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248 | quant_product += Math.min(quant_colour_hist1[i], quant_colour_hist2[i]);
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249 |
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250 | // consider replacing with abs for difference
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251 | }
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252 |
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253 | console.log("Product for HSL histogram: " + quant_product);
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254 |
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255 | return quant_product;
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256 | }
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257 |
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258 |
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259 | function displayFlags(img_list,$displayDiv,$progressArea,$progressBar)
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260 | {
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261 | var img_list_len = img_list.length;
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262 |
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263 | if (img_list_len==0) {
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264 | return;
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265 | }
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266 | else if (img_list_len>show_progress) {
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267 | $progressArea.slideDown();
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268 | }
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269 |
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270 | img_list.sort();
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271 |
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272 | var root_img_re = /^.*\/(.*?)\..*?$/;
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273 |
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274 | var progress_step = 100.0 / img_list_len;
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275 |
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276 | var callback_count = 0;
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277 |
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278 | var i;
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279 | for (i=0; i<img_list.length; i++) {
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280 | var img_url = img_list[i];
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281 | var img_matches = root_img_re.exec(img_url);
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282 | var title = img_matches[1];
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283 |
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284 | var imageObj = new Image();
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285 | imageObj.onload = function() {
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286 | callback_count++;
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287 | progressVal += progress_step;
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288 | $progressBar.progressbar('value',progressVal);
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289 |
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290 | if (callback_count == img_list_len) {
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291 | if (img_list_len>show_progress) {
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292 | progressVal = 100;
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293 | $progressBar.progressbar('value',progressVal);
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294 | //$progressArea.slideUp();
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295 |
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296 | // Now move on and start computing colour histograms
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297 | setTimeout(function()
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298 | { doneDisplayFlags(img_list,$progressArea,$progressBar); }
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299 | ,start_hist_delay);
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300 | }
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301 | }
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302 | };
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303 |
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304 |
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305 | /*
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306 | $("h2").live('mousedown', function(e) {
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307 | if( (e.which == 1) ) {
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308 | alert("left button");
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309 | }if( (e.which == 3) ) {
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310 | alert("right button");
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311 | }else if( (e.which == 2) ) {
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312 | alert("middle button");
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313 | }
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314 | e.preventDefault();
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315 | }).live('contextmenu', function(e){
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316 | e.preventDefault();
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317 | });
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318 | */
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319 |
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320 | imageObj.onclick = function(e) {
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321 | // Store result of HSL quantization in the image object/tag
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322 | if (!this.quantHSLHist) {
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323 | // Only need to compute this if it is not already stored in the object/tag
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324 | this.quantHSLHist = createHSLHistogram(this,16);
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325 | console.log(this.quantHSLHist);
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326 | }
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327 |
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328 | if (e.which == 1 ) {
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329 | // Left => use in comparison pair
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330 | flag_comparison_array[clicked_on_count] = this.quantHSLHist;
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331 |
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332 | clicked_on_count++;
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333 | if (clicked_on_count==2) {
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334 | // trigger comparison
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335 | alert("Similarity score: " + quantizedColourHistogramComparison(flag_comparison_array[0],flag_comparison_array[1]));
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336 | clicked_on_count=0;
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337 | }
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338 | }
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339 | else if (e.which == 2) {
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340 | // Middle => fix on this and do similarity with everything else
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341 | var fix_id = this.id;
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342 | e.preventDefault();
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343 | }
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344 |
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345 | };
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346 |
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347 |
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348 | imageObj.src = img_url;
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349 | imageObj.title = title.toUpperCase();
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350 | imageObj.country = imageObj.title;
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351 | imageObj.id = "flag-img-" + i;
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352 |
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353 | $displayDiv.append(imageObj);
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354 | }
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355 | }
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356 |
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357 |
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358 |
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359 |
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360 |
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361 | function calcSimilarityValues(newFlagQuantHSLHist, $displayDiv,$progressArea,$progressBar)
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362 | {
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363 | console.log("*** calcSimilarityValues()");
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364 |
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365 | var iframe = $('#similarity-2d-iframe').contents();
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366 |
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367 | var img_obj_list = iframe.find('#flagArea').children('img').toArray();
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368 |
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369 | var img_obj_list_len = img_obj_list.length;
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370 |
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371 | if (img_obj_list_len==0) {
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372 | return;
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373 | }
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374 | else if (img_obj_list_len>show_progress) {
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375 | // number of images to process non-trivial
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376 | $progressArea.slideDown();
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377 | }
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378 |
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379 | var progress_step = 100.0 / img_obj_list_len;
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380 |
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381 | for (var i=0; i<img_obj_list.length; i++) {
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382 | var imgObj = img_obj_list[i];
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383 |
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384 | var existingQuantHSLHist = imgObj.quantHSLHist;
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385 |
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386 | var similarity_score = quantizedColourHistogramComparison(newFlagQuantHSLHist,existingQuantHSLHist);
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387 | imgObj.similarityScore = similarity_score;
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388 | imgObj.title = imgObj.country + ", Similarity score: " + similarity_score;
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389 |
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390 | progressVal += progress_step;
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391 | console.log("*** i = " + i);
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392 | console.log("*** pbar = " + $progressBar.progressbar);
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393 | if ($progressBar.progressbar) {
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394 | $progressBar.progressbar('value',progressVal);
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395 | }
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396 | }
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397 |
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398 | //progressVal = 100;
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399 | //$progressBar.progressbar('value',progressVal);
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400 |
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401 | if (img_obj_list_len>show_progress) {
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402 | $progressArea.slideUp();
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403 | }
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404 | }
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405 |
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406 | function sortUsingAttribute(parent, childSelector, field) {
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407 | var items = parent.children(childSelector).sort(function(a, b) {
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408 | var vA = a.attr(field);
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409 | var vB = b.attr(field)
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410 | return (vA < vB) ? -1 : (vA > vB) ? 1 : 0;
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411 | });
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412 |
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413 | parent.empty(childSelecctor);
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414 | parent.append(items);
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415 | }
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416 |
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417 |
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418 | function compareSimilarityValue(a,b) {
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419 |
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420 | //var vA = a.similarityScore;
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421 | //var vB = b.similarityScore;
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422 | //return (vA < vB) ? -1 : (vA > vB) ? 1 : 0;
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423 |
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424 | return (b.similarityScore - a.similarityScore);
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425 | }
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426 |
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427 | function sortFlagsBySimilarityValue($iframe)
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428 | {
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429 | var img_obj_list = $iframe.find('#flagArea > img').toArray();
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430 |
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431 | var sorted_img_obj_list = img_obj_list.sort(compareSimilarityValue);
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432 | //console.log("*** sorted img len = " + sorted_img_obj_list.length);
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433 |
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434 | $iframe.find('#flagArea').empty('img');
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435 |
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436 | $iframe.find('#flagArea').append(sorted_img_obj_list);
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437 |
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438 | //sortUsingAttribute('#flagArea','img','similarityValue');
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439 | }
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440 |
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441 |
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442 |
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443 | function computeFlagHistogramChain(chain_count, img_list_len,
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444 | progressVal, progress_step,
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445 | $progressArea,$progressBar)
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446 | {
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447 | var flag_id = "flag-img-" + chain_count;
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448 | console.log("Processing Image ID: " + flag_id);
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449 | var imageObj = document.getElementById(flag_id);
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450 |
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451 | if (!imageObj.quantHSLHist) {
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452 | // Only need to compute this if it is not
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453 | // already stored in the object/tag
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454 |
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455 | if (retrieveFromServer) {
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456 | // see if it is stored on the server
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457 | console.log("Retrieving stored colour histogram for " + imageObj.title.toLowerCase() + " ...");
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458 | $.ajax({
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459 | async: false,
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460 | dataType: "json",
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461 | url: "../similarity-2d/json-data/" + imageObj.title.toLowerCase() + ".json",
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462 | success: function(data) {
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463 | console.log("... success");
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464 | // 'data' is the array of integer vals we want
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465 | imageObj.quantHSLHist = data;
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466 | },
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467 | error: function() {
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468 | console.log("... not stored on server");
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469 | // not stored on the server (currently)
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470 | // => need to compute it
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471 | imageObj.quantHSLHist = createHSLHistogram(imageObj,16);
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472 | //console.log(imageObj.quantHSLHist);
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473 |
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474 | }
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475 | });
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476 | }
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477 | else {
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478 | imageObj.quantHSLHist = createHSLHistogram(imageObj,16);
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479 | }
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480 |
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481 | }
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482 |
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483 | if (chain_count < img_list_len-1) {
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484 | progressVal += progress_step;
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---|
485 | $progressBar.progressbar('value',progressVal);
|
---|
486 |
|
---|
487 | setTimeout(function()
|
---|
488 | { computeFlagHistogramChain(chain_count+1,img_list_len,
|
---|
489 | progressVal, progress_step,
|
---|
490 | $progressArea,$progressBar)
|
---|
491 | }
|
---|
492 | ,mini_delay // any time delay causes break in 'rendering' thread, even 0!
|
---|
493 | );
|
---|
494 |
|
---|
495 | }
|
---|
496 | else {
|
---|
497 | $progressArea.find('span:first').text("Done.");
|
---|
498 | if (img_list_len>show_progress) {
|
---|
499 | progressVal = 100;
|
---|
500 | $progressBar.progressbar('value',progressVal);
|
---|
501 | $progressArea.slideUp();
|
---|
502 | }
|
---|
503 |
|
---|
504 | doneComputingHistograms(img_list_len);
|
---|
505 | }
|
---|
506 | }
|
---|
507 |
|
---|
508 |
|
---|
509 | function computeFlagHistograms(img_list,$progressArea,$progressBar)
|
---|
510 | {
|
---|
511 | var img_list_len = img_list.length;
|
---|
512 |
|
---|
513 |
|
---|
514 | if (img_list_len==0) {
|
---|
515 | $progressArea.find('span:first').text("Empty list: no computation needed.");
|
---|
516 | return;
|
---|
517 | }
|
---|
518 |
|
---|
519 |
|
---|
520 | $progressArea.find('span:first').text("Computing histograms:");
|
---|
521 | progressVal = 0;
|
---|
522 |
|
---|
523 | if (img_list_len>show_progress) {
|
---|
524 | $progressArea.slideDown();
|
---|
525 | }
|
---|
526 |
|
---|
527 | var progress_step = 100.0 / img_list_len;
|
---|
528 |
|
---|
529 | // Start the chaining process
|
---|
530 | setTimeout(function()
|
---|
531 | { computeFlagHistogramChain(0,img_list_len,
|
---|
532 | progressVal, progress_step,
|
---|
533 | $progressArea,$progressBar)
|
---|
534 | }
|
---|
535 | ,mini_delay // any time delay causes break in 'rendering' thread, even 0!
|
---|
536 | );
|
---|
537 |
|
---|
538 | }
|
---|
539 |
|
---|
540 | function doneComputingHistograms(img_list_len)
|
---|
541 | {
|
---|
542 | quantHSLHistogramArray = new Array(img_list_len);
|
---|
543 | for (var i=0; i<img_list_len; i++) {
|
---|
544 | var flag_id = "flag-img-" + i;
|
---|
545 | var imageObj = document.getElementById(flag_id);
|
---|
546 | quantHSLHistogramArray[i] = imageObj.quantHSLHist;
|
---|
547 | }
|
---|
548 | var json_hist_data = JSON.stringify(quantHSLHistogramArray);
|
---|
549 |
|
---|
550 | if (hasLocalStorage) {
|
---|
551 | // build up quantHSLHistogramArray from all the images
|
---|
552 |
|
---|
553 | console.log("Storing computed HSL histograms in localStorage");
|
---|
554 | localStorage.quantHSLHistogramArray = json_hist_data;
|
---|
555 | }
|
---|
556 |
|
---|
557 | if (saveOnServer) {
|
---|
558 | // run-length encode data, so less to send
|
---|
559 | var quantHSLHistogramArrayRLE = new Array(img_list_len);
|
---|
560 | for (var i=0; i<img_list_len; i++) {
|
---|
561 | //console.log("rle encoding ... i = " + i);
|
---|
562 | quantHSLHistogramArrayRLE[i] = runlength_encode(quantHSLHistogramArray[i])
|
---|
563 |
|
---|
564 | //var test_decode_array = runlength_decode(quantHSLHistogramArrayRLE[i]);
|
---|
565 | //console.log("Checking decoded array: " + arrays_identical(test_decode_array,quantHSLHistogramArray[i]));
|
---|
566 | }
|
---|
567 |
|
---|
568 |
|
---|
569 | var json_hist_data_rle = JSON.stringify(quantHSLHistogramArrayRLE);
|
---|
570 |
|
---|
571 | var json_filename = "all-hsv-histograms-rle.json";
|
---|
572 | var data = { jsonFilename: json_filename, jsonData: json_hist_data_rle};
|
---|
573 |
|
---|
574 | console.log("Saving colour histogram data for all flags");
|
---|
575 | $.ajax({
|
---|
576 | type: "POST",
|
---|
577 | url: "../similarity-2d/save-json-data.jsp",
|
---|
578 | data: data
|
---|
579 | });
|
---|
580 | }
|
---|
581 | }
|
---|
582 |
|
---|
583 | function doneDisplayFlags(img_list,$progressArea,$progressBar)
|
---|
584 | {
|
---|
585 | console.log("doneDisplayFlags()");
|
---|
586 |
|
---|
587 | var needToComputeHistograms = true;
|
---|
588 |
|
---|
589 | if (hasLocalStorage) {
|
---|
590 |
|
---|
591 | if (localStorage.quantHSLHistogramArray) {
|
---|
592 |
|
---|
593 | console.log("Retrieving quantized HSL histograms from local storage");
|
---|
594 |
|
---|
595 | var stored_hist_array = JSON.parse(localStorage["quantHSLHistogramArray"]);
|
---|
596 | if (stored_hist_array.length == img_list.length) {
|
---|
597 | // Assume if the number of images process hasn't changed, then neither
|
---|
598 | // has the stored historgram values
|
---|
599 |
|
---|
600 | quantHSLHistogramArray = stored_hist_array;
|
---|
601 |
|
---|
602 | var i;
|
---|
603 | for (i=0; i<img_list.length; i++) {
|
---|
604 | var flag_id = "flag-img-" + i;
|
---|
605 | var imageObj = document.getElementById(flag_id);
|
---|
606 | imageObj.quantHSLHist = quantHSLHistogramArray[i];
|
---|
607 | }
|
---|
608 |
|
---|
609 | needToComputeHistograms = false;
|
---|
610 | }
|
---|
611 | else {
|
---|
612 | console.log("Different number of images detected => regenerating");
|
---|
613 | }
|
---|
614 | }
|
---|
615 | }
|
---|
616 |
|
---|
617 | if (needToComputeHistograms) {
|
---|
618 |
|
---|
619 | if (retrieveFromServer) {
|
---|
620 | // before computing histograms from scratch, see if resulting data stored on server
|
---|
621 |
|
---|
622 | console.log("Retrieving stored colour histgram data for all flags ...");
|
---|
623 | $.ajax({
|
---|
624 | async: true,
|
---|
625 | dataType: "json",
|
---|
626 | url: "../similarity-2d/json-data/all-hsv-histograms-rle.json",
|
---|
627 | success: function(rle_data) {
|
---|
628 | console.log("... success");
|
---|
629 | if (rle_data.length != img_list.length) {
|
---|
630 | console.log("Stored histogram data out of date with flag list.");
|
---|
631 | console.log("rle len = " + rle_data.length + ", img_list len = " + img_list.length);
|
---|
632 | // what is stored on the sever differed to the number of images displayed
|
---|
633 | computeFlagHistograms(img_list,$progressArea,$progressBar);
|
---|
634 | }
|
---|
635 | else {
|
---|
636 | var img_list_len = img_list.length;
|
---|
637 | quantHSLHistogramArray = new Array(img_list_len);
|
---|
638 |
|
---|
639 | // Need to rle decode each entry in this array
|
---|
640 | for (var i=0; i<img_list_len; i++) {
|
---|
641 | quantHSLHistogramArray[i] = runlength_decode(rle_data[i]);
|
---|
642 | var flag_id = "flag-img-" + i;
|
---|
643 | var imageObj = document.getElementById(flag_id);
|
---|
644 | imageObj.quantHSLHist = quantHSLHistogramArray[i];
|
---|
645 |
|
---|
646 | }
|
---|
647 |
|
---|
648 | needToComputeHistograms = false;
|
---|
649 |
|
---|
650 | $progressArea.slideUp();
|
---|
651 | doneComputingHistograms(img_list.length);
|
---|
652 |
|
---|
653 | }
|
---|
654 | },
|
---|
655 | error: function() {
|
---|
656 | console.log("... not stored on server");
|
---|
657 | computeFlagHistograms(img_list,$progressArea,$progressBar);
|
---|
658 | }
|
---|
659 | });
|
---|
660 |
|
---|
661 |
|
---|
662 | }
|
---|
663 | else {
|
---|
664 | computeFlagHistograms(img_list,$progressArea,$progressBar);
|
---|
665 | }
|
---|
666 | }
|
---|
667 | else {
|
---|
668 | $progressArea.slideUp();
|
---|
669 | doneComputingHistograms(img_list.length);
|
---|
670 | }
|
---|
671 | }
|
---|
672 |
|
---|
673 | function rankBySimilarity(imageData,x_dim,y_dim)
|
---|
674 | {
|
---|
675 | // quantizedColourHistogramComparison(quant_colour_hist1,quant_colour_hist2)
|
---|
676 |
|
---|
677 | }
|
---|