图像二值化

Author: qianlifeng

Captcha/Binaryzation.py

@@ -1,4 +1,45 @@
+#coding=gbk
 
+from __future__ import unicode_literals
+import Image
+import urllib
 
 class Binaryzation(object):
-    pass
+    """
+    将图像进行二值化处理
+    """
+    
+    image = None
+    
+    def __init__(self,img):
+        self.image = img
+    
+    def __ConvertToGray(self):
+        """
+        将图片灰度化处理
+        """
+        if self.image:
+            return self.image.convert('L')
+        return None
+    
+    def ConvertToBinaryzation(self,b):
+        """
+        二值化
+        b: 可以理解为亮度，大于这个亮度的全部变为纯白色
+        """
+        if self.image:
+            self.image = self.__ConvertToGray()
+            return self.image.point(lambda i:i > b and 255)
+        return None
+
+
+if __name__ == '__main__':
+    url = 'http://regcheckcode.taobao.com/auction/checkcode?sessionID=f06c56ea0e0bda9a9d71832422b68f29'
+    s = urllib.urlopen(url).read()
+    f = open('v.jpg','wb')
+    f.write(s)
+    f.close()
+    im = Image.open('v.jpg')
+    b =  Binaryzation(im)
+    im = b.ConvertToBinaryzation(160)
+    im.show()