GSR - FR wrote: > Well, what would you call a script that just puts a menu entry and > calls convolution matrix with a fixed matrix? The main reason not to use convmatrix is that internally it always does a 5x5 convolution, regardless of the matrix entries. This means it should take almost three times as long as the 3x3 convolution in blur.c; in fact, a little testing on a 5000 x 10000 image shows it taking over four times as long. Otherwise using convmatrix would probably be the right solution. Best, -- Bill ______________ ______________ ______________ ______________ Sent via the KillerWebMail system at primate.ucdavis.edu