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 _________________________________________________________________________