why the answer is coming as matrix and not a single number?

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haya yousuf 2016-7-1

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评论： haya yousuf 2016-7-1

I'm trying to find an answer of an mathematics operation to find a difference in two different black and white images, and the answer is coming as an matrix and i only need a single value.... what can i do? and how i can take two values for different conditions (equal pr not equal) if the answer is coming as matrix with different number of ones at each time?

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haya yousuf 2016-7-1

i mean for example (A==B)=0, the answer is not a matrix

haya yousuf 2016-7-1

it worked with (isequal). Thank You:)

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dpb 2016-7-1

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" and how i can take two values for different conditions (equal pr not equal) if the answer is coming as matrix ...?"

Well, the short answer is

truefalse=all(yourDifferenceArray);  % only a single pixel is noted as a difference
truefalse=any(yourDifferenceArray);  % takes every pixel to be different for TRUE

Or, of course, you could have some threshold of how many must be different to count by

truefalse=sum(yourDifferenceArray)<ThresholdNumber;

This assumes the difference is the plain subtraction so '==' returns 1 (TRUE) for locations that are the same.