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arithmatic functions for gray scale image

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mahesh chathuranga
mahesh chathuranga 2013-9-30
关闭： MATLAB Answer Bot 2021-8-20
i have a gray scale image.my codes are
V=(-1*diff(summ));%%gives the horizontal edges of the image
H=(-1*(diff(summ'))');%%gives the vertical edges of the image
HV=imadd(H,V);%%i want to see the both edges in same image.
i'm very new for matlab.i dont know these codes are correct or not.is there any operation to convert the arithmatic results into image.thanks.
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mahesh chathuranga
mahesh chathuranga 2013-10-3
summ is the the image of cooccurrence matrix features(contrast and energy)
Image Analyst
Image Analyst 2013-10-3
The cooccurrence matrix is a 2D array and can be displayed as an image, true. But, the edges of the cooccurrence matrix??? I have no idea what that would even represent. I don't think it means anything, at least nothing intuitive that I can think of.

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回答（1 个）

Image Analyst
Image Analyst 2013-9-30
Why not use imgradient() or imgradientxy()?
  2 个评论
mahesh chathuranga
mahesh chathuranga 2013-10-3
it gives the error message??? Undefined function or method 'imgradient' for input arguments of type 'double'.
Image Analyst
Image Analyst 2013-10-3
You must be using an old version of MATLAB. Please download the latest version. It's included in your maintenance contract.

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