what's the meaning of '>' with Mat

answered 2013-12-06 03:50:55 -0600

berak
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updated 2013-12-06 03:53:29 -0600

it's a shortcut for 'threshold'

// result: binary Mat , where any pixel in the original > 50 is set to 255 (on),
//  all others to 0 (off)
m = m > 50;   

// same as:
threshold(m,m,50,255,0);

cv::Mat has a lot of 'overloaded' operators, so you can write equations like:

Mat v = a * x + b;

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The overloaded operators are good for prototyping, but do remember the temporary objects generated by those operator. Although expression template can eliminate those temporary objects but opencv do not implement them by expression template.

stereomatching ( 2013-12-06 21:52:37 -0600 )edit

@berak as i know '>' use compare() but i did not check it.

sturkmen ( 2017-09-03 08:57:03 -0600 )edit

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