GC Preview from Graphic Code allows you to pull in any layer from any set of Gerbers and overlay them. And it's free. Tom Dagostino Teraspeed(R) Labs 13610 SW Harness Lane Beaverton, OR 97008 503-430-1065 503-430-1285 FAX tom@xxxxxxxxxxxxx www.teraspeed.com Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 401-284-1827 -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Stuart Brorson Sent: Wednesday, April 16, 2008 2:13 PM To: Kotson, Michael Cc: Nima Lotfi; si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Comparing layers on two artworks > I'm looking for input on a tool for comparing artwork. I've done a > quick search of the archives and haven't seen anyone discuss this topic.. If you're using Linux, another option is to try this flow: 1. Generate Gerbers using your layout tool. 2. Read in the Gerbers using the open-source Gerber viewing tool "gerbv", available here: http://gerbv.sourceforge.net/ 3. Using gerbv, you can export .png files. (Indeed, there should be a way to just use gerbv as a command line filter to create .png files, like this: gerbv --export-png GerberFile.gbr 4. Then, you can use the "compare" utility from ImageMagick to visually compare the two .png files. This is described here: http://www.imagemagick.org/script/compare.php Note that I haven't used this flow myself, so I can't warn you against any gotchas. However, the gerbv build system uses this flow to verify correctness on a nightly basis (or whenever there is a checkin) so it should work for you too. Linux only, however! Cheers, Stuart ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu