ocr.py 文件源码

def ocr(img):
    # threshold the image to ignore background and keep text
    gray = img.convert('L')
    #gray.save('captcha_greyscale.png')
    bw = gray.point(lambda x: 0 if x < 1 else 255, '1')
    #bw.save('captcha_threshold.png')
    word = pytesseract.image_to_string(bw)
    ascii_word = ''.join(c for c in word if c in string.letters).lower()
    return ascii_word