On Fri, 21 Jun 2013 22:39:19 -0500 Doug Newgard <[email protected]> wrote:
> ---------------------------------------- > > Date: Sat, 22 Jun 2013 10:44:15 +0900 > > From: [email protected] > > To: [email protected] > > CC: [email protected] > > Subject: Re: [E-devel] Enlightenment pngs with embedded iCC profiles > > > > On Fri, 21 Jun 2013 16:15:47 -0500 Doug Newgard > > <[email protected]> said: > > > >> I'm sure some of you have seen the warnings generated by libpng > >> 1.6: "known incorrect sRGB profile". Now, this is no big deal, > >> it's just a warning, but I still wanted to look into it further. > >> By my count, there are 800 png files in Enlightenment, of which > >> only 6 have embedded iCC profiles, all from HP. The rest are sRGB > >> colorspace, but do not include a profile. There are some good > >> arguments for this (http://imageoptim.com/color-profiles.html > >> http://www.gballard.net/psd/save_for_web_embed_ICC_profile.html) > >> and since this seems to be the default, I've attached the 6 files > >> with the profiles stripped out. As you can see, it doesn't change > >> the image or the colorspace, it just leaves the calibration up to > >> the end user's system. > >> > >> I haven't been able to find just what's wrong with the HP iCC > >> profile being used that the authors of libpng don't like, but it > >> makes sense to standardize the way profiles are handled anyway. > >> And it has the nice side effect of silencing warnings, even if the > >> Debian/Ubuntu users aren't likely to see them for a couple of > >> years. > >> > >> I can just change the iCC profile instead if you would prefer. > >> I've seen multiple people recommend the Argyll sRGB profile, which > >> is still "sRGB IEC61966-2.1" and is public domain. > >> > >> Elementary has a lot more pngs with the HP profile, so once I know > >> for sure what people would prefer, I'll fix them, too. > >> > >> Doug > > > > what we need to know is what is adding the hp profile causing the > > warinig. what tool does it? is it gimp? photoshop? imagemagick? > > otherwise we go creating warnings again if that tool is used... > > That's a good question. On my machine, GIMP refuses to even export > the image with the HP profile, so I doubt that's it unless that's > because of libpng 1.6. I do know that the HP profile is not included > with GIMP, only their built-in profile which is used for display, it > does not get embedded into images. I did find some information about > the HP profile in relation to Photoshop, but others said that it > didn't come with Photoshop and suggested it may have been included > with printer/scanner software. I did find that Photoshop does not > embed a profile by default when exporting PNGs. As far as I can tell, > Imagemagick doesn't include any iCC profiles, so that can't be it, > either. On my system, I have profiles from Colord, Argyll, Oyranos, > and Yamma, and none of them include the problem profile. Where this > profile came from is sitll a bit of a mystery to me. Look at the SVN / git history for the images with that HP profile. That at least will tell you WHO added them. Than ask that person what they used to make them / last used to massage them / where they got them from. -- A big old stinking pile of genius that no one wants coz there are too many silver coated monkeys in the world.
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