设置水印透明度
(im, opacity)
| 70 | |
| 71 | |
| 72 | def set_opacity(im, opacity): |
| 73 | """ |
| 74 | 设置水印透明度 |
| 75 | """ |
| 76 | assert 0 <= opacity <= 1 |
| 77 | |
| 78 | alpha = im.split()[3] |
| 79 | alpha = ImageEnhance.Brightness(alpha).enhance(opacity) |
| 80 | im.putalpha(alpha) |
| 81 | return im |
| 82 | |
| 83 | |
| 84 | def crop_image(im): |