do you realize that your file has an alpha channel?
please consult docs for imread.
you need to ask for IMREAD_UNCHANGED.
further, cvtColor can’t convert to “grayscale with alpha”. that format isn’t defined.
do you realize that your file has an alpha channel?
please consult docs for imread.
you need to ask for IMREAD_UNCHANGED.
further, cvtColor can’t convert to “grayscale with alpha”. that format isn’t defined.