$ pamgauss 3 3 -sigma=.5 -tupletype=GRAYSCALE >gauss.pam $ pnmconvol -nooffset gauss.pam tmp > /dev/null pnmconvol: WARNING - this convolution matrix is biased. average weight = -7.007843 (unbiased would be 1) pnmconvol: Maybe you want the -nooffset option?
*** This bug has been marked as a duplicate of bug 338230 ***