Photoshop - Corrupts JPEG on load!

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  05 May 2010
Photoshop - Corrupts JPEG on load!

The following image looks correct in browsers (FF or IE) and in viewers (e.g.Irfanview) but not in Photoshop! Save the JPEG and open it in Photoshop, see it yourself...Pay attention to the pink aliasing on the top-right.


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Last edited by tomNL : 05 May 2010 at 10:44 AM.
 
  05 May 2010
It looks fine to me, although it's hard to tell on such a small image.
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  05 May 2010
sRGB image without a profile?

Looks fine (same as in browsers) after assigning sRGB profile, defaulting to working adobe RGB results a bit too saturated colors.

Could you tell what color settings do you have and with wich option you open the image (leave, assing working (what do you have here) or assing adobeRGB?)

edit: what ever I do, can't see the pink aliasing.
 
  05 May 2010


Subtle but horrible...
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  05 May 2010
ok. That one.

Colors seem brighter too on that right one and that I noticed at the first place. Opening with sRGB assigned fixes it here. To what profile you open the file in photoshop? And where does it come from (so what profile it should use?).

Last edited by halen : 05 May 2010 at 01:10 PM. Reason: typing
 
  05 May 2010
Originally Posted by halen: Opening with sRGB assigned fixes it here.
How do you do that? The following steps are now working as you said:
1) Open image
2) Edit / Assign Profile / sRGB
Still corrupt...

Originally Posted by halen: And where does it come from (so what profile it should use?).
Actually, it doesn't have to be color managed. See, any other application displays this file correctly.
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Last edited by tomNL : 05 May 2010 at 01:27 PM.
 
  05 May 2010
Quote: Actually, it doesn't have to be color managed. See, any other application displays this file correctly.


..and most of other applications just silently show untagged image as sRGB, photoshop uses working profile (usually Adobe RGB).

But if sRGB doesn't fix it for you, I'm kind of running out of ideas, since it does here.
 
  05 May 2010
Hey Tom (Maxwell customer here). Weird problem and assigning sRGB to the texture doesn't fix it for me in Photoshop CS5. Definitely shows up differently in Preview.app in OS X

I'll contact someone from Adobe about this. PM me your email.
 
  05 May 2010
Weird, I tried to open the image in PaintTool SAI (no color management) and the result is just like in Photoshop. In painter 11 or GIMP, the image is displayed correctly.
It has probably to do with your jpeg compression that the two programs are unable to read correctly.
If I convert the image to bmp and compress again in jpeg, they are able to display them correctly.
That's weird they are sharing the same bug.
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  05 May 2010
Originally Posted by halen: since it does here.
Please, tell me the exact steps you're following. Otherwise, I have to think you cannot see the difference.
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  05 May 2010
^my apologies - I was a bit hasty then (life happens also here). My steps were quite similar to yours when opening with sRGB -profile. And you are right - sRGB seems to correct some part of the problem, but not all of it. Strange. Below image some different tries:


up-left: photoshop, adobe rgb
up-right: photoshop, sRGB assigned
down-right: photoshop, some DHTV profile assigned
down-left: windows default viewer

Now with bit more time (and zoom) to look at it - it really seems that photoshop makes some larger junks there. Unfortunate. Hope this gets fixed.

Last edited by halen : 05 May 2010 at 03:27 PM.
 
  05 May 2010
Thanks for confirming halen. As you see it's quite subtle and destructive.
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  05 May 2010
Interpolation setting possibly? this issue seems to corrolate towards your previous issue with rotation. I did actually upsacle that image by 500% then reduce by the same amount so it would resample. Admitedly it was more blured but the artifact was gone

Last edited by conbom : 05 May 2010 at 09:12 PM.
 
  05 May 2010
No, it has nothing to do with the other post.
As you see, here I only do "OPEN" in several applications and compare.

Let's see:



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  05 May 2010
Adobe developer Chrix Cox made a comment here:
http://forums.adobe.com/message/2783831#2783831

..and locked both reports due to sockpuppetry (in his words).
Fan-tas-tic!
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Last edited by tomNL : 05 May 2010 at 11:30 PM.
 
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