Re: [Geotools-devel] Testing rendering by image comparison: depending on external tools?

2011-03-27 Thread Simone Giannecchini
Ciao Andrea, I would suggest going for perceptual diff, the problem you have identified (similarity in images) is an hard problem to solve per se and I am worried by the fact that we might be introducing too much complexity for performing this test, at least unless we find something java-based that

Re: [Geotools-devel] Testing rendering by image comparison: depending on external tools?

2011-03-27 Thread Michael Bedward
Hi Andrea and Ian, I'm following this discussion with great interest. I've also fallen prey to the difficulty of pixel by pixel comparison across different platforms in the past. I'm afraid I don't have any independent suggestions but I'd certainly support using a tool like PerceptualDiff regardl