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arithmatic functions for gray scale image

Asked by mahesh chathuranga on 30 Sep 2013
Latest activity Commented on by Image Analyst on 3 Oct 2013

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.

3 Comments

Jan Simon on 30 Sep 2013

Now it would be helpful, if you explain what "summ" is. The more details we have to guess, the less matching the answers will be.

mahesh chathuranga on 3 Oct 2013

summ is the the image of cooccurrence matrix features(contrast and energy)

Image Analyst on 3 Oct 2013

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.

mahesh chathuranga

1 Answer

Answer by Image Analyst on 30 Sep 2013

Why not use imgradient() or imgradientxy()?

2 Comments

mahesh chathuranga on 3 Oct 2013

it gives the error message??? Undefined function or method 'imgradient' for input arguments of type 'double'.

Image Analyst on 3 Oct 2013

You must be using an old version of MATLAB. Please download the latest version. It's included in your maintenance contract.

Image Analyst

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