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naivekun
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Nov 11, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,11 +1,65 @@ | ||
| from PIL import Image, GifImagePlugin, ImageFilter, ImageOps | ||
| from pytesseract import image_to_string | ||
|
|
||
| def deCaptcha(imageContent): | ||
| # def deCaptcha(imageContent, maxConfirmDepoint = 10): | ||
| # with Image.open(imageContent) as imageObject: | ||
| # imageObject.seek(1) | ||
| # grayImage = imageObject.convert("L") | ||
| # binarizedImage = grayImage.point(lambda i: i == 255 and 255) | ||
| # depointedImage = binarizedImage.filter(ImageFilter.MedianFilter(3)) | ||
| # code = image_to_string(depointedImage, config='--psm 10 --oem 3 -c tessedit_char_whitelist=0123456789')[0:4] | ||
| # return code | ||
| def depoint(img): | ||
| pixdata = img.load() | ||
| w,h = img.size | ||
| for y in range(1,h-1): | ||
| for x in range(1,w-1): | ||
| count = 0 | ||
| if pixdata[x,y-1] > 245:#上 | ||
| count = count + 1 | ||
| if pixdata[x,y+1] > 245:#下 | ||
| count = count + 1 | ||
| if pixdata[x-1,y] > 245:#左 | ||
| count = count + 1 | ||
| if pixdata[x+1,y] > 245:#右 | ||
| count = count + 1 | ||
| if pixdata[x-1,y-1] > 245:#左上 | ||
| count = count + 1 | ||
| if pixdata[x-1,y+1] > 245:#左下 | ||
| count = count + 1 | ||
| if pixdata[x+1,y-1] > 245:#右上 | ||
| count = count + 1 | ||
| if pixdata[x+1,y+1] > 245:#右下 | ||
| count = count + 1 | ||
| if count > 5: | ||
| pixdata[x,y] = 255 | ||
| return img | ||
|
|
||
| def deCaptcha(imageContent, maxConfirmDepoint = 10): | ||
| with Image.open(imageContent) as imageObject: | ||
| imageObject.seek(1) | ||
| grayImage = imageObject.convert("L") | ||
| grayImage = ImageOps.expand(imageObject.convert("L"), border=5, fill='white') | ||
| binarizedImage = grayImage.point(lambda i: i == 255 and 255) | ||
| depointedImage = binarizedImage.filter(ImageFilter.MedianFilter(3)) | ||
| code = image_to_string(depointedImage, config='--psm 10 --oem 3 -c tessedit_char_whitelist=0123456789')[0:4] | ||
| return code | ||
| depointedImage = depoint(binarizedImage) | ||
| ret = "0000" | ||
| while maxConfirmDepoint > 0: | ||
| # remove median filter to improve accurcy from 0.984 to 0.994 | ||
|
|
||
| depointedImage = depoint(depointedImage) | ||
| # depointedImage = depointedImage.filter(ImageFilter.MedianFilter(3)) | ||
| code1 = image_to_string(depointedImage, config='--psm 10 --oem 3 -c tessedit_char_whitelist=Oo0123456789') | ||
| depointedImage = depoint(depointedImage) | ||
| # depointedImage = depointedImage.filter(ImageFilter.MedianFilter(3)) | ||
| code2 = image_to_string(depointedImage, config='--psm 10 --oem 3 -c tessedit_char_whitelist=Oo0123456789') | ||
| depointedImage = depoint(depointedImage) | ||
| # depointedImage = depointedImage.filter(ImageFilter.MedianFilter(3)) | ||
| code3 = image_to_string(depointedImage, config='--psm 10 --oem 3 -c tessedit_char_whitelist=Oo0123456789') | ||
|
|
||
| if code1 == code2 or code1 == code3: | ||
| ret = code1 | ||
| break | ||
| if code2 == code3: | ||
| ret = code2 | ||
| break | ||
| maxConfirmDepoint -= 1 | ||
| return "".join([x.replace("o", "0").replace("O", "0") for x in ret if x not in ["\n", "\x0c"]]) |