Maxim Dolgolyov
39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
"""
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Crop a question row from a rendered PDF page PNG.
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Usage:
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python crop_question_row.py <page_png> <x0> <y0> <x1> <y1> <out_png>
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Coordinates are NORMALIZED (0.0-1.0) relative to page dimensions.
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Add --padding 0.01 for extra border (default 0.005).
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Example:
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python crop_question_row.py page_005.png 0.0 0.12 1.0 0.22 2019_v1_a7.png
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"""
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import sys
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import argparse
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from PIL import Image
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def crop(page_png, x0, y0, x1, y1, out_png, padding=0.005):
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img = Image.open(page_png)
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w, h = img.size
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px0 = max(0, int((x0 - padding) * w))
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py0 = max(0, int((y0 - padding) * h))
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px1 = min(w, int((x1 + padding) * w))
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py1 = min(h, int((y1 + padding) * h))
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cropped = img.crop((px0, py0, px1, py1))
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cropped.save(out_png)
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print(f'Saved {out_png} ({cropped.width}x{cropped.height})')
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('page_png')
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parser.add_argument('x0', type=float)
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parser.add_argument('y0', type=float)
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parser.add_argument('x1', type=float)
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parser.add_argument('y1', type=float)
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parser.add_argument('out_png')
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parser.add_argument('--padding', type=float, default=0.005)
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args = parser.parse_args()
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crop(args.page_png, args.x0, args.y0, args.x1, args.y1, args.out_png, args.padding)
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