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max and min values in a Mat

asked 2014-01-27 04:54:43 -0500

ati gravatar image

updated 2016-01-29 14:07:44 -0500

Hi..How do I get the max and min value in a Mat? Is there any function in Opencv which return these two values?

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answered 2014-01-27 05:05:34 -0500

Guanta gravatar image

minMaxLoc(), see http://docs.opencv.org/modules/core/doc/operations_on_arrays.html?highlight=minmaxloc#minmaxloc

Usage:

double min, max;
cv::minMaxLoc(your_mat, &min, &max);

The function can also give you the location of the min and max-values:

cv::Point min_loc, max_loc
cv::minMaxLoc(your_mat, &min, &max, &min_loc, &max_loc);
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is there any way to do this for a float? or do i have to write my own?

opencvnoob29838 gravatar imageopencvnoob29838 ( 2015-05-01 16:17:15 -0500 )edit

Don't worry, you can use the function also for float matrices, just the result will be always double (which you can then cast to float).

Guanta gravatar imageGuanta ( 2015-05-03 05:25:53 -0500 )edit

@Guanta, I had tried the code to get the location in a mat for the min and max for the array and the result is like this... What does this mean?

00000000002DF458 00000000002DF438

Thanks

zms gravatar imagezms ( 2015-12-10 07:43:45 -0500 )edit

@Guanta, I had tried using the code to look on the max and min location. I got these answers. Can I know what is this mean?

00000000002DF458 00000000002DF438

Thanks

zms gravatar imagezms ( 2015-12-10 07:44:41 -0500 )edit

Probably you print the points wrongly.

Guanta gravatar imageGuanta ( 2015-12-11 05:46:43 -0500 )edit
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Asked: 2014-01-27 04:54:43 -0500

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Last updated: Jan 27 '14