lookup into array given a matrix (just replacing the values of matrix by vector)

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Aravin
Aravin 2012-8-9
Hi everyone,
I have a very big matrix R of uint8. For every element (0-255) I have an other value in array A, where A is 256 length vector.
Now How can I replace each element in R by their lookup value in A. I want to do it as fast as it can.

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Image Analyst
Image Analyst 2012-8-9
编辑：Image Analyst 2012-8-9
The function you want to use is called intlut() and it's in the Image Processing Toolbox. It's fast and is just a single line of code.
new_R = intlut(R, A);

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