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How to convert black and white image to a matrix 100 x 100 ?

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sali
sali 2015-10-16
编辑： Andrei Bobrov 2015-10-17
Dear all, I have a black and white image that I want to read it as a matrix of size 100 x 100, I need the elements of the matrix to be 1 for black pixels and -1 for the white pixels, could any one help me in how to have the size of the matrix to be 100 x 100 and its elements 1 and -1? thank you

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Andrei Bobrov
Andrei Bobrov 2015-10-16
c = [1 0 0 1 1 1 0 1 0 0]
out = ~c*2-1
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sali
sali 2015-10-16
编辑：Andrei Bobrov 2015-10-17
Thanks Andrei for your answer, I could use this after reading the image and convert it to 100x 100 matrix which I did not yet figure it out!

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