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Convert Image to Braille Unicode text (using PIL)
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| '''Convert image to braille text''' | |
| import argparse | |
| from PIL import Image | |
| def parse_args(): | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument("-t", "--th", default=127, type=int, dest="threadh") | |
| parser.add_argument("-w", "--width", default=120, type=int, dest="width") | |
| parser.add_argument("-s", "--scale", default=1.0, type=float, dest="scale") | |
| parser.add_argument( | |
| "-i", "--invert", action="store_true", dest="invert" | |
| ) | |
| parser.add_argument('file' ) | |
| return parser.parse_args() | |
| def convert(imgfile: str, width=160, scale=1.0, cutoff=127, invert=False) -> str: | |
| res: list[str] = [] | |
| # load image | |
| im_src = Image.open(imgfile) | |
| WIDTH = int(width * scale) | |
| HEIGHT = int(WIDTH / im_src.width * im_src.height) | |
| # create black/white image | |
| im_res: Image.Image = ( | |
| im_src.convert("L") | |
| .resize((WIDTH, HEIGHT), resample=Image.HAMMING) | |
| .point(lambda x: x > cutoff if invert else x < cutoff, mode="1") | |
| ) | |
| # check every pixel (row step: 4, col step: 2) | |
| for row in range(0, im_res.height, 4): | |
| line: list[str] = [] | |
| for col in range(0, im_res.width, 2): | |
| val, i = 0, 0 | |
| for c_pos in range(0, 2): | |
| for r_pos in range(0, 4): | |
| if col + c_pos < im_res.width and row + r_pos < im_res.height: | |
| p = im_res.getpixel((col + c_pos, row + r_pos)) | |
| else: | |
| p = 0 | |
| if p > 0: | |
| val += 1 << i | |
| i += 1 | |
| line.append(chr(0x2800 + val)) | |
| res.append("".join(line)) | |
| return "\n".join(res) | |
| if __name__ == '__main__': | |
| args = parse_args() | |
| print(convert(args.file, args.width, args.scale, args.threadh, args.invert)) |
Author
sooop
commented
Nov 17, 2024
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