Colors of pictures differ between PixInsight and Astrobin (using same computer)

georgian82
26 Feb, 2018 21:33
Hi all,

I am having some trouble with the accuracy of the colors between what I see on my PixInsight module and after I upload the same picture to Astrobin. The pictures I upload to Astrobin always look more purple and more saturated and I just can't tell which one I should go with, my PixInsight desktop or Astrobin.

Any comments of whether this is normal or any suggestions of how I can solve this would be appreciated.

Thanks!
Sebastian
Edited 26 Feb, 2018 21:34
siovene
26 Feb, 2018 22:07
Hi Sebastian,
try saving your PixInsight export with an embedded sRGB profile. There's a PI process for that, tho I can't recall the name at the moment.
georgian82
26 Feb, 2018 23:04
Salvatore Iovene
Hi Sebastian,
try saving your PixInsight export with an embedded sRGB profile. There's a PI process for that, tho I can't recall the name at the moment.
Salvatore,

Thank you so much for the quick response. I will look into this.

Cheers,
GerminianiMaicon
26 Feb, 2018 23:35
Also can be The monitor Was used for processing
georgian82
26 Feb, 2018 23:45
Maicon Germiniani
Also can be The monitor Was used for processing
I am using the same monitor for processing and uploading to Astrobin so they should look the same. I made sure to go through the calibration process (of the monitor) and I still have issues.

Thanks,
2ghouls
27 Feb, 2018 01:53
Salvatore Iovene
There's a PI process for that, tho I can't recall the name at the moment.
It's called ICCProfileTranformation.  smile
Thirteen
27 Feb, 2018 14:21
I personally adapted to the process of saving the image to be uploaded as a high quality jpg that is NOT tagged with an ICC profile (at which point I believe it defaults to sRGB for internet display).   For whatever reason I have found an image tagged with sRGB and one not to display differently here.

My complete processing is done in AdobeRGB 1998 space and then for the final save to be uploaded I will save it to jpg that is NOT tagged with a profile.    This action will ensure the uploaded and displayed images visually match my working files in AdobeRGB 1998 space.     I have no idea why this works, but I believe it was Salvatore himself that suggested I try this a few years ago.   It still works for me.   More importantly, it works reasonably well for whatever device and browser I use to access Astrobin.

Hope this helps.   I suggested this to a friend and seems he has a different experience.   So, as they say, your mileage may vary.   It would be worth a try.
Edited 27 Feb, 2018 18:40
georgian82
27 Feb, 2018 17:57
Jason Guenzel
I personally adapted to the process of saving the image to be uploaded as a high quality jpg that is NOT tagged with an ICC profile (at which point I believe it defaults to sRGB for internet display).   For whatever reason I have found an image tagged with sRGB and one not to display differently here.

My complete processing is done in Adobe 1998 space and then for the final save to be uploaded I will save it to jpg that is NOT tagged with a profile.    This action will ensure the uploaded and displayed images visually match my working files in Adobe 1998 space.     I have no idea why this works, but I believe it was Salvatore himself that suggested I try this a few years ago.   It still works for me.   More importantly, it works reasonably well for whatever device and browser I use to access Astrobin.

Hope this helps.   I suggested this to a friend and seems he has a different experience.   So, as they say, your mileage may vary.   It would be worth a try.
Thank you for the reply.

Are you configuring to Adobe 1998 before you start processing or at the very end after you are done and want to save to JPG?
Die_Launische_Diva
27 Feb, 2018 18:12
Just in case, here's a test to see how your browser(s) handle ICC profiles: http://www.color.org/version4html.xalter
Thirteen
27 Feb, 2018 18:39
georgian82
Thank you for the reply.Are you configuring to Adobe 1998 before you start processing or at the very end after you are done and want to save to JPG?
To be clear my working spaces in both PI and PS are set to Adobe RGB (1998 ).    To export the jpg, I typically do that from PS and save with the box to tag an ICC profile unchecked.
Edited 27 Feb, 2018 18:40
georgian82
27 Feb, 2018 19:42
Jason Guenzel
georgian82
Thank you for the reply.Are you configuring to Adobe 1998 before you start processing or at the very end after you are done and want to save to JPG?
To be clear my working spaces in both PI and PS are set to Adobe RGB (1998 ).    To export the jpg, I typically do that from PS and save with the box to tag an ICC profile unchecked.

Why do you leave the ICC profile box unchecked? Don't you want the profile to be saved when exporting to JPG? Maybe I am missing something…
Thirteen
27 Feb, 2018 20:20
That’s what I am saying, it doesn’t make sense.  If I upload a tagged image it will not display the same on various equipment and browsers.    If I leave it untagged, I am able to get consistency.    To enable this, I work in AdobeRGB (199smile and set my proof mode to sRGB for final tweaking.   Then I save an untagged image.

I would love to know why this creates consistency, because over the years I’ve started threads on other forums with analysis of browser behaviors, etc.   There has been a multitude of feedback to try this and that.   But, in the end, this simple act has allowed me to upload an image here that matches (as closely as possible) my processing PC display, regardless of device.

I certainly will watch for other responses and am only telling my experience with the issue.
georgian82
27 Feb, 2018 20:55
Jason Guenzel
That’s what I am saying, it doesn’t make sense.  If I upload a tagged image it will not display the same on various equipment and browsers.    If I leave it untagged, I am able to get consistency.    To enable this, I work in AdobeRGB (199smile and set my proof mode to sRGB for final tweaking.   Then I save an untagged image.

I would love to know why this creates consistency, because over the years I’ve started threads on other forums with analysis of browser behaviors, etc.   There has been a multitude of feedback to try this and that.   But, in the end, this simple act has allowed me to upload an image here that matches (as closely as possible) my processing PC display, regardless of device.

I certainly will watch for other responses and am only telling my experience with the issue.
I understand. That is interesting…Let's see what others have to say.

Thanks again,
dakloifarwa
28 Feb, 2018 00:32
That's a very interesting topic. I always had problems when uploading calibrated image files and didn't know why…
RickS
28 Feb, 2018 11:22
Since stripping of ICC profiles was fixed a while back I mostly process in AdobeRGB and upload images including profiles.  I have been fairly happy with the consistency of the results.  I have no idea how they look to others though  smile

Unfortunately, there are so many places that colour management can break that it is often difficult to determine the cause(s) of a problem.  I have two Windows 10 computers on my desk.  On one of them irfanview does colour management and on the other it doesn't.  Despite a lot of effort I haven't been able to figure out why!

Cheers,
Rick.
georgian82
28 Feb, 2018 18:18
So I reached out to Kayron Mercieca from Light Vortex Astronomy (amazing tutorials for PixInsight users!) and he suggests adjusting the default color profile to Adobe RGB and only changing it to sRGB before saving to JPG or PNG (PNG being better for Astrobin as it is of higher quality).

I did it myself last night and uploaded the last image I was working on again to Astrobin and both images from the PixInsight desktop and Astrobin look exactly the same now.

These topics can be found here:

http://www.lightvortexastronomy.com/tutorial-introduction-to-pixinsight-and-its-interface.html#Section2
http://www.lightvortexastronomy.com/tutorial-preparing-images-for-publication.html
 
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