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2017-06-20 23:29:03 -0600 | asked a question | How to know the output array type of meanStdDev without looking at the source code Hi All: The API documentation of meanStdDev (C++: void meanStdDev(InputArray src, OutputArray mean, OutputArray stddev, InputArray mask=noArray())) does not clearly indicate the OutputArray type, i.e., whether the output array is a CV_32S or CV_32F or CV_64F. Only by checking the source code (https://github.com/opencv/opencv/blob...) I find out the rules for determining the output type:
Without such important type info, I do not know how to properly access the output array (i.e. mean.at<t>(0)). I am wondering is there a easier way to look up such important info? In addition, what are the general rules regarding the input/output parameters types for OpenCV functions? |