Re: Affinity Photo and colorsync issue, maybe
"Indeed, it seems to me that perhaps David's image is not tagged or that there's something else causing it to get tagged with a different profile. David...have you confirmed that the both applications think that the image is in the same space…?" b& I’m not a color scientist. You folks are. In PS CS5 I put the image file in 16 bit, ProPhoto RGB, tiff. Been doing this for years. Learned from classes, books, Bruce Fraser’s book, etc. I have been warned that ProPhoto RGB is too wide a gamut for my Epson Pro 9900 and NEC PA271(2). Sometimes I use RGB TIFF 16-bit Beta RGB from RPP 64. And, sometime when in RPP 64, I use LAB TIFF 16-bit. I will have an image file, ProPhoto RGB, 16-bit tiff in a working folder. Reopen this image file in PS CS5 (or) LR 6.4 and the image file looks the same. This very same image file, not manipulated in Affinity Photo, and opened in Affinity Photo, does not look like the image file opened in the other two applications. What should I be doing? Kind Regards, David
On Mar 27, 2016, at 8:40 PM, Millers' Photography L.L.C. <digitalimaging@dnmillerphoto.com> wrote:
I will have an image file, ProPhoto RGB, 16-bit tiff in a working folder. Reopen this image file in PS CS5 (or) LR 6.4 and the image file looks the same. This very same image file, not manipulated in Affinity Photo, and opened in Affinity Photo, does not look like the image file opened in the other two applications.
What should I be doing?
In Affinity Photo, View menu => Studio => Info. Make sure it says that the profile is ProPhoto. If not, Document menu => Assign ICC Profile and set it to ProPhoto. If that doesn't work, something else is going on.... Cheers, b&
Am 28.03.2016 um 05:40 schrieb Millers' Photography L.L.C. <digitalimaging@dnmillerphoto.com>:
I will have an image file, ProPhoto RGB, 16-bit tiff in a working folder. Reopen this image file in PS CS5 (or) LR 6.4 and the image file looks the same. This very same image file, not manipulated in Affinity Photo, and opened in Affinity Photo, does not look like the image file opened in the other two applications.
What should I be doing?
As a first step, to find out which application does the correct thing and which does not, you could do the following: 1. Download ftp://ftp.ritual.org/common/ColorManagement/CoreImageBugTestFiles.zip 2. Unpack the zip archive and open "Color Test Chart Float ProPhoto RGB.tiff" in your applications 3. In System Preferences, choose ProPhoto RGB as your display profile (this will make the colors on your screen look totally off, but that does not matter for this test) 4. Launch DigitalColor Meter from /Applications/Utilities/, set the pop-up to “native” and measure some color patches of the image. 5. If the color patches are combinations of only RGB 0, 50, 100, 150, 200 and 250, the application handles the image correctly. Otherwise, it does not. (It would be especially strange if all your applications performed correctly in this test case, but would produce different colors otherwise.) Background: All the color patches in the (computationally created) "Color Test Chart Float ProPhoto RGB.tiff" image are combinations of only RGB 0, 50, 100, 150, 200 and 250, and the image is in ProPhoto RGB color space. If you set your display color space to ProPhoto RGB, too, and then measure the screen colors with DigitalColor Meter, they should be exactly as computed, since no color transform needs to take place at all. If the color patches aren’t as computed, the (huge) ProPhoto RGB color gamut was incorrectly compressed somewhere along the way, indicating an incorrect color management performance. Bye Uli _________________________________________________________________________ Uli Zappe, Christian-Morgenstern-Straße 16, D-65201 Wiesbaden, Germany http://www.ritual.org Fon: +49-700-ULIZAPPE Fax: +49-700-ZAPPEFAX _________________________________________________________________________
participants (3)
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Ben Goren
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Millers' Photography L.L.C.
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Uli Zappe