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Problem with meanStdDev

asked 2013-01-25 14:14:51 -0600

unxnut gravatar image

I seem to be having a problem trying to compute the mean and standard deviation of pixels in an image. Can someone look at my code and point out what I am doing wrong? I am unable to get correct results.

cv::Mat             img;
cv::Mat     mean;
cv::Mat     stddev;

cv::meanStdDev ( img, mean, stddev );
uchar       mean_pxl =[0];
uchar       stddev_pxl =[0];

I have also tried to get the data using<uchar>(0) without success.

Thanks for your help.

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answered 2017-03-22 04:28:14 -0600

TripleS gravatar image

The return type should be

double       mean_pxl = mean.val[0];
double       stddev_pxl = stddev.val[0];

otherwise you can use "auto"

auto mean_pxl = mean.val[0];
auto stddev_pxl = stddev.val[0];
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Keep in mind that for auto you will need to enable c++11.

StevenPuttemans gravatar imageStevenPuttemans ( 2017-03-22 05:26:33 -0600 )edit

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Asked: 2013-01-25 14:14:51 -0600

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Last updated: Mar 22 '17