| 11 | |
| 12 | # 二值化并转格式 |
| 13 | def binary(image_name, binary_image_name): |
| 14 | # 白底黑字 |
| 15 | args = "convert -monochrome "+image_name+" "+binary_image_name |
| 16 | # print args |
| 17 | proc = subprocess.Popen(args, shell=True) |
| 18 | proc.wait() |
| 19 | im = Image.open(binary_image_name) |
| 20 | w, h = im.size |
| 21 | data = list(im.getdata()) |
| 22 | if (data[0], data[w-1], data[(h-1)*w], data[h*w-1]) == (0, 0, 0, 0): # 0-黑色，255-白色 |
| 23 | # 若非白底黑字则灰度反转 |
| 24 | args1 = "convert -negate "+binary_image_name+" "+binary_image_name |
| 25 | proc1 = subprocess.Popen(args1, shell=True) |
| 26 | proc1.wait() |
| 27 | |
| 28 | # 计算范围内点的个数 |
| 29 | def numpoint(im): |