Colour management, again...

sanphotgn
Posts: 385
Joined: 26 Aug 07 18:06

Re: Colour management, again...

Post by sanphotgn » 08 Feb 17 22:15

simato73, I don't know if these will be helpful or not, but I found this discussion regarding the location of the icc profiles and copying them to new locations:

https://discussions.apple.com/thread/7383327

A tutorial, with screen shots:

http://www.redrivercatalog.com/profiles ... n-osx.html

An aside, while looking for the above ... I found these discussions regarding a possible bug in the operating systems which may or may not impact comparisons between applications:

https://discussions.apple.com/thread/7291462

http://apple.stackexchange.com/question ... mages-when
Photo Supreme 3.3.0.2602 (64 bits) (Windows)

simato73
Posts: 33
Joined: 27 Nov 16 23:10

Re: Colour management, again...

Post by simato73 » 08 Feb 17 22:48

HCS wrote:
Hert wrote:PSU for macOS looks in /System/Library/ColorSync/Profiles/
Could the place where PSU looks be made configurable?

Or conversely, how could i copy my own profiles to this directory? OSX doesn't let me (not in Finder, not in terminal, not even with sudo).
Hert, what HCS wrote is important.
I have also tried to copy the monitor profile icc to where PSu looks for it, failing.
I then went on googling why and I discovered that from El Capitan, OS X is protected with an additional security feature against malware etc, called SPI, System Integrity Protection, also known as "rootless mode".
this means certain directories of /System cannot be modified even as root and you need to go to special lengths to do it, which means disabling the security feature.
I, and I think others, would not want to do that, in order to enable PSu to find the monitor icc profile.
As it stands, the colour management in PSu cannot work as intended for Mac users using a current OS, because new monitor profiles cannot be written where PSu goes to look for them.

I think it would be better if PSu looked for icc profiles in ~/Library/ColorSync/Profiles instead of /System/Library/ColorSync/Profiles or maybe let the user choose location.
Simone

simato73
Posts: 33
Joined: 27 Nov 16 23:10

Re: Colour management, again...

Post by simato73 » 08 Feb 17 22:50

sanphotgn wrote:simato73, I don't know if these will be helpful or not, but I found this discussion regarding the location of the icc profiles and copying them to new locations:

https://discussions.apple.com/thread/7383327

A tutorial, with screen shots:

http://www.redrivercatalog.com/profiles ... n-osx.html

An aside, while looking for the above ... I found these discussions regarding a possible bug in the operating systems which may or may not impact comparisons between applications:

https://discussions.apple.com/thread/7291462

http://apple.stackexchange.com/question ... mages-when
Thank you sanphotgn,

I know how to install colour profiles.
The previous posts are about the two locations where normally icc profiles are located in OS X.
Users have to put them, as described in the links you provided, in ~/Library/ColorSync/Profiles
Profiles can also reside in /System/Library/ColorSync/Profiles which is where PSu looks, and which is write protected - see my previous post.
This is the heart of the problem.

The other part you mention about the possible bug in OS X is interesting and I will read the links you provided with attention to form an opinion.

PS: I have added the links and it appears that system-wide colour management in OS X is not as flawless a I believed it to be, although the conditions under which the problems manifest themselves are relatively uncommon and do not apply in my system.
I am finding colour across applications consistent, at least as far as my eyes can tell me. I have opened the same tiff file in 5 different applications, including PSu and the only way I got PSu to match the other applications is using the way I described above.
Simone

Mke
Posts: 265
Joined: 15 Jun 14 15:39

Re: Colour management, again...

Post by Mke » 09 Feb 17 0:40

simato73 wrote:I am a bit wary of doing that because the whole Mac OS X is colour managed, and this seems like applying colour correction twice.
Yes, I overlooked that Macs may be different. Pursuing this out of curiosity, I've come across this from Apple's 2014 Technical Note TN2313:
  • "It is imperative you use color managed authoring tools. All of the various Apple tools are color managed — some third party tools are color managed as well. Tools that are color managed are usually very sophisticated. It is up to you to make sure they are properly configured."
https://developer.apple.com/library/con ... G_PROOFING

simato73
Posts: 33
Joined: 27 Nov 16 23:10

Re: Colour management, again...

Post by simato73 » 09 Feb 17 19:53

Mke wrote:
simato73 wrote:I am a bit wary of doing that because the whole Mac OS X is colour managed, and this seems like applying colour correction twice.
Yes, I overlooked that Macs may be different. Pursuing this out of curiosity, I've come across this from Apple's 2014 Technical Note TN2313:
  • "It is imperative you use color managed authoring tools. All of the various Apple tools are color managed — some third party tools are color managed as well. Tools that are color managed are usually very sophisticated. It is up to you to make sure they are properly configured."
https://developer.apple.com/library/con ... G_PROOFING
Interesting, but it soon becomes inaccessibly technical for me.
However it confirms what I know acout Mac OS X
Simone

HCS
Posts: 147
Joined: 19 Feb 14 22:08

Re: Colour management, again...

Post by HCS » 10 Feb 17 21:13

I've added following Mantis feature ticket 0003152, please put in your vote for it by leaving a comment that says "+1".

simato73
Posts: 33
Joined: 27 Nov 16 23:10

Re: Colour management, again...

Post by simato73 » 10 Feb 17 22:25

HCS wrote:I've added following Mantis feature ticket 0003152, please put in your vote for it by leaving a comment that says "+1".
Thank you for the pointer, I added my comment.
Simone

HCS
Posts: 147
Joined: 19 Feb 14 22:08

Re: Colour management, again...

Post by HCS » 11 Feb 17 11:33

simato73 wrote:Thank you for the pointer, I added my comment.
Thanks Simone

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