HELP!!! Adjustments won’t stick

CR
Posted By
Christopher_Rainville
Aug 6, 2008
Views
2837
Replies
6
Status
Closed
Suddenly I am no longer able to make any adjustments to images. When I try altering the curves, or levels, it looks like a change is happening,(shows up in preview)but when we hit OK, the change I made completely disappears and the image looks the same as before I tried to apply the adjustment.
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John Joslin
Aug 6, 2008
Try resetting your preferences as described in the FAQ.

<http://www.adobeforums.com/webx/.ef4a07f/1>

You either have to physically delete (or rename) the preference files or, if using the Alt, Ctrl, and Shift method, be sure that you get a confirmation dialog.

This resets all settings in Photoshop to factory defaults.

A complete uninstall/re-install will not affect the preferences and a corrupt file there may be causing the problem.
JM
J_Maloney
Aug 6, 2008
Chris:

You’re not working on a "grayscale" scan, are you? If you have a bi-level bitmap image with some type of screening applied, you will see gray values at a viewing percentage of say 25%. When you alter the image with curves/levels you’ll see those changes applied to the preview at 25%, but because the image is a bi-level bitmap, no changes can really be made (except inverting the image, and changing all the pixels to either black or white).

Try viewing at 100% while you apply your edits.

Also see if your image is "bitmap". If it is, change to grayscale at a 1:1 ratio. You might then upsample (bicubic smoother) the image 1.5 – 2 times to give yourself some gray values to curve. You can then downsample (bicubic sharper) when you’re done curving. You might even go back to image… mode… bitmap when all it said and done for file size.

J
CR
Christopher_Rainville
Aug 6, 2008
Thanks for the help!
I am having this problem with a simple drawing. I will go through the steps. I open a new doc.
I am in RGB
The problem seems to occur using levels or curves with noise applied. For example, if I want to make a simple star field I fill the layer, add noise, use levels or curves to get the number of stars I want. I can see the adjustment by looking at the preview, hit OK and as soon as the adjustment box closes, the noise jumps back to where I started.
JM
J_Maloney
Aug 6, 2008
Chris:

Try viewing at 100% when you do your curves.

Also, you should try blurring the noise field a little using gaussian blur before you do your curves. Basically, if you worked before (unsuccessfully) by viewing at 50%, then that’s the equivalent of adding a 1 pixel blur before doing curves – 33% = 1.5 pix; 25% = 2 pix; 16.7% = 3 pix; 12.5% = 4 pix and so on.

J
CR
Christopher_Rainville
Aug 6, 2008
Adding a slight blur did the trick. Thanks!
JM
J_Maloney
Aug 7, 2008
Great. 🙂

I think I was overestimating the necessary blur by a factor of two, if it’s even analogous at all.

J

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