长宽比会变; 比原图更大，而且gitee不认格式？

原库有位用户的分享：[Incorrect aspect ratio in output of img2img.py (and similars: img2img_color.py, video2video.py and video2video_color.py) #21](https://github.com/vietnh1009/ASCII-generator/issues/21)

用 img2img 测试的确如所言有效，回头消化一下再加到 img2img_color。

```python
def main(opt):
    if opt.background == "white":
        bg_code = 255
    else:
        bg_code = 0
    char_list, font, sample_character, scale = get_data(opt.language, opt.mode)
    num_chars = len(char_list)
    num_cols = opt.num_cols
    image = cv2.imread(opt.input)
    image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    height, width = image.shape
    char_bbox = font.getbbox(sample_character)
    char_width = char_bbox[2] - char_bbox[0]
    char_height = char_bbox[3]
    cell_width = width / opt.num_cols
    #cell_height = scale * cell_width
    cell_height = (char_height/char_width) * cell_width
    num_rows = int(height / cell_height)
    if num_cols > width or num_rows > height:
        print("Too many columns or rows. Use default setting")
        cell_width = 6
        #cell_height = 12
        cell_height = (char_height/char_width) * cell_width
        num_cols = int(width / cell_width)
        num_rows = int(height / cell_height)
    #char_width, char_height = font.getsize(sample_character)
    out_width = char_width * num_cols
    out_height = scale * char_height * num_rows
    out_image = Image.new("L", (out_width, out_height), bg_code)
    draw = ImageDraw.Draw(out_image)
```

吴烜/图像字符化

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吴烜/图像字符化 .gitee-modal { width: 500px !important; }

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