Output type must be specified in absdiff, but no argument to do so

C++
1

The call cv::absdiff(mean, frame_in, diff); gives the error error: (-5:Bad argument) When the input arrays in add/subtract/multiply/divide functions have different types, the output array type must be explicitly specified in function 'arithm_op' ,where mean is CV_32FC3 and frame_in is the input frame, so CV_8UC3.

However, there is no definition in core/core.hppof absdiff that provides a way to specify the output type. I’ve tried copying frame_in to a CV_32FC3 mat as well as specifying the type of diff, all to no avail.

I assume I’m missing something, but am at a loss to figure out what.

2

that’s true. the error stems from a function called internally.
however, mean and frame_in must have exactly the same size, depth & channels here (and no need to do anything with diff, just leave empty).

if there are still doubts, please show, how those Mat’s are constructed.

3

That does it. My problem was trying to use a copy constructor to convert to CV_32FC3, when the correct approach is to do something like frame_in.convertTo(frame_in_32, CV_32FC3);

Thanks for the quick response!