local differences for the index matrix

The information needed to reconstruct the original image is:

i) the color of pixel p1 ;

ii) a table providing the correspondence between (S1, S2, . . . , SM) with index (i1, i2, . . . , iM);

iii) the set of differences: D(I') = {dx,y|x = 1, 2, . . . ,m; y = 1, 2, . . . , n} where each dx,y is a local difference obtained by considering some specific patterns as better specified after.

D(I')={I'x,y - I'x,y-1}

what are the input's are needed for this equation to be solved?

I have index matrix and colormap(RGB) value of an image

[Image Analyst]

Read this: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

Answer 1

[Walter Roberson]

That is a definition rather than an equation. The definition as given cannot be correct. Consider I'x,1 : the difference would require knowing I'x,(1-1) = I'x,0 but index 0 is not defined for I'