The 2D raised cosine and hanning convolution kernels are not correct.
The 1D versions are correct.
Bugs: aconvolve
Bugs
Bugs fixed in CIAO 4.17
The following is a list of bugs that were fixed in the CIAO 4.17 software release.
Byte type images (unsigned 8-bit integer) produce incorrect results when using method=fft
When using method=fft, byte type images are incorrectly cast to a singed data-type, meaning values above 128 become negative.
Workaround:
Users can either user method=slide or change the data-type by specifying it as part of the virtual file syntax, eg
aconvovle "infile.img[opt type=i2]" ...