Diagonal direction - difference between adjacent elements

Chethan S

2011 5 6

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I have a matrix,

I =  5     4     3
     9     8     6
     6     3     4

How can I calculate differences between adjacent elements in a diagonal directions. I want these outputs(for first and last rows and columns I don't mind padding):

   4     3
   5     6
  -3     4

and

   4     3
   3     2
  -6    -4

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Teja Muppirala 2011-5-6

在 MATLAB Online 中打开

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Use 2-D convolution:

I = [ 5     4     3;
      9     8     6;
      6     3     4;]
I_1 = I;
I_2 = I;
I_1(2:end,1:end-1) = conv2(I,[0 1; -1 0],'valid')
I_2(2:end,2:end) = conv2(I,[1 0; 0 -1],'valid')