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python用10行代码实现对黄色图片的检测功能

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Release: 2016-06-06 11:14:36
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本文实例讲述了python用10行代码实现对黄色图片的检测功能。分享给大家供大家参考。具体如下:

原理:将图片转换为YCbCr模式,在图片中寻找图片色值像素,如果在皮肤色值内的像素面积超过整个画面的1/3,就认为是黄色图片。

申明:简单场景还是够用了,稍微复杂一点就不准确了,例如:整幅画面是人的头像,皮肤色值的像素必然超过50%,被误认为黄色图片就太武断了。

需要安装python图片库PIL支持

porn_detect.py如下:

import sys,PIL.Image as Image
img = Image.open(sys.argv[1]).convert('YCbCr')
w, h = img.size
data = img.getdata()
cnt = 0
for i, ycbcr in enumerate(data):
  y, cb, cr = ycbcr
  if 86 <= cb <= 117 and 140 <= cr <= 168:
    cnt += 1
print '%s %s a porn image.'%(sys.argv[1], 'is' if cnt > w * h * 0.3 else 'is not')
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运行:

代码如下:

python porn_detect.py myphoto.png

希望本文所述对大家的Python程序设计有所帮助。

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