/*

https://stackoverflow.com/questions/57071788/google-vision-api-text-detection-display-words-by-block


https://gist.github.com/UBISOFT-1/f00e4d22790f4af378d70b237fa56ca9

    response = client.text_detection(image=image)
    # The actual response for the first page of the input file.
    breaks = vision.enums.TextAnnotation.DetectedBreak.BreakType
    paragraphs = []
    lines = []
    # extract text by block of detection
    for page in response.full_text_annotation.pages:
        for block in page.blocks:
            for paragraph in block.paragraphs:
                para = ""
                line = ""
                suppose = str(paragraph.bounding_box)
                suppose = suppose.replace('vertices ','')
                print(suppose)
                for word in paragraph.words:
                    for symbol in word.symbols:
                        line += symbol.text
                        if symbol.property.detected_break.type == breaks.SPACE:
                            line += ' '
                        if symbol.property.detected_break.type == breaks.EOL_SURE_SPACE:
                            line += ' '
                            lines.append(line)
                            para += line
                            line = ''
                        if symbol.property.detected_break.type == breaks.LINE_BREAK:
                            lines.append(line)
                            para += line
                            line = ''
            paragraphs.append(para)


    return "\n".join(paragraphs)




https://blog.searce.com/tips-tricks-for-using-google-vision-api-for-text-detection-2d6d1e0c6361

def draw_boxes(image, bounds, color,width=5):
    draw = ImageDraw.Draw(image)
    for bound in bounds:
        draw.line([
            bound.vertices[0].x, bound.vertices[0].y,
            bound.vertices[1].x, bound.vertices[1].y,
            bound.vertices[2].x, bound.vertices[2].y,
            bound.vertices[3].x, bound.vertices[3].y,
            bound.vertices[0].x, bound.vertices[0].y],fill=color, width=width)
    return image
def get_document_bounds(response, feature):
    for i,page in enumerate(document.pages):
        for block in page.blocks:
            if feature==FeatureType.BLOCK:
                bounds.append(block.bounding_box)
            for paragraph in block.paragraphs:
                if feature==FeatureType.PARA:
                    bounds.append(paragraph.bounding_box)
                for word in paragraph.words:
                    for symbol in word.symbols:
                        if (feature == FeatureType.SYMBOL):
                            bounds.append(symbol.bounding_box)
                    if (feature == FeatureType.WORD):
                        bounds.append(word.bounding_box)
    return bounds
bounds=get_document_bounds(response, FeatureType.WORD)
draw_boxes(image,bounds, 'yellow')

*/