Heh. Thanks for answering this, Chris. I missed it the first time 'round.
Elzbieta, you can find whether a particular pattern is present in an image by convolving the image with the pattern you're looking for. The resulting convolved image will have a spike everywhere that the pattern is present. One PDL function you can use to do that is convolveND(). On Jun 27, 2014, at 6:24 AM, Chris Marshall <[email protected]> wrote: > Perl and PDL can be used for image processing. > Probably the easiest way to familiarize yourself > with PDL capabilities is to install PDL and then > look at the PDL Book. You can find this and other > PDL information starting at the PDL home page: > > http://pdl.perl.org > > --Chris > > On Tue, Jun 24, 2014 at 3:03 AM, Elżbieta Jakubska > <[email protected]> wrote: >> I need to compare many images to pattern image (logo) and find out which of >> them match the pattern (shape is more meaningful than colour). Logo has the >> same size, the same rotation etc on every picture, but backgrounds are >> different, including additional edges in interesting area. Till now I was >> doing this with Image Magick (edge detection + compare), but it is slow and >> not always works correctly. >> Is there a way to do this using PDL? Could anybody help me? >> >> Thank you very much! >> >> Ela >> >> _______________________________________________ >> Perldl mailing list >> [email protected] >> http://mailman.jach.hawaii.edu/mailman/listinfo/perldl >> > > _______________________________________________ > Perldl mailing list > [email protected] > http://mailman.jach.hawaii.edu/mailman/listinfo/perldl > _______________________________________________ Perldl mailing list [email protected] http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
