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Please, I need ahelp about the mask ?

2 次查看（过去 30 天）
Eman Shaltout
Eman Shaltout 2015-2-3
关闭： MATLAB Answer Bot 2021-8-20
any one can help me about ,why the sum of mask should be zero ? like sobel , Prewitt ,median ,lablacian........
why please sum of mask = 0 ?

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