Photoshop: Rotate tool degrades image with odd pattern (with sample)

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  • Problem
  • Updated 6 years ago
  • (Edited)
Rotate tool causing an odd pattern on 16bit files in 64 bit photoshop CS6 in windows 7

it is mostly visible in shadow areas



i am using:
photoshop extended 64 bit
win 7 64bit with intel Xeon (r) Cpu x5365 8 gigs of ram

video card: Nvidia Quadro FX 3800
total available graphics memory 4607
memory interface 256-bit
cuda cores 192
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Koby S

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Posted 6 years ago

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Chris Cox

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Is this during the preview, or after committing the final rotate?
And which resampling kernel are you using?
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Koby S

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this happens right after i open a raw file and rotate it slightly in photoshop cs6 using the ruler tool. which doesn't show what resampling kernel is being used.
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Chris Cox

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The error is in the transparency channel - yes, flattening will make it go away.

We still need more information on how to reproduce the visual error in the first place.
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Koby S

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what information can i give you?
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Chris Cox

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I don't know - I'm not seeing the problem on my systems. We need enough information to reproduce the problem on other systems.
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Koby S

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is there anywhere i can send u the raw/tif file? and u can try the same thing i did?
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Chris Cox

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email me at ccox {at} adobe [dot] com (email address obfuscated to entertain the spammers)
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Koby S

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just to make it clear it is the final rotate result
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Koby S

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also i am using the graphic processor
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PECourtejoie, Champion

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I'm not making fun of your issue, but I'd really like to get a filter that does produce this kind of texture. Reminds me of old book covers.
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John Doogan

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I'm getting exactly the same problem and I'm sure it is a bug. I've opened PS 5.1 and I don't get the error. In 5.1the blockiness shows up in the rotation preview when using free transform but once the rotation is action the blockiness dissapears.
A lot of photomerge panoramas done in CS6 where the individual images have had to be rotated have been wrecked because of this problem, a right pain in the !#$*
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Chris Cox

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That sounds like you're seeing something complete different in CS 5.5.

And the visible problem we're talking about here is just on screen -- the documents are fine.
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Koby S

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currently we don't know what's happening with the file, because i can only track the errors on the screen, might not necessarily mean there isn't something happening to image data behind the scene, i just don't have the software to track algorithm changes of image files.
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John Doogan

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Interestingly I have also discovered this exact problem. It is visible at viewing a 16 bit files after Photomerge at 100%, and mainly in the shadow areas. It disappears when converting the file to 8 bit, copying to clipboard or saving the file.
Mac OS 10.7.4. Photoshop CS6
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Chris Cox

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Which means you probably have the same sort of video driver problem.