Adjustments won't hold

Forum|Forum|5 years ago
February 7, 2021
4 replies
934 views

I scanned a few documents and am using Photoshop to pretty them up. While Photoshop will accept my image and canvas size adjustments, it won't take any adjustments to Brightness, Contrast, Curves, etc. I can preview them as I make the adjustments, but when I click on "OK," they revert back to the original.

I just tested this on some old photos that I recently scanned, on the same scanner, and editing them works fine. I'm not sure what I did.

There is one thing I did different when scanning the documents from the pictures - I scanned the documents in B&W, and the photos were done in color. I tried changing the "MODE" from "Grayscale" to "RGB Color," but that didn't fix the problem.

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c.pfaffenbichler

Community Expert

Last try …

Apparently you scanned a bitmap and converted that to grayscale. So there are only black and white pixels, no gray ones.

So vertain adjustments may seem to have an effect at magnifications below 100% but actually they DO NOT.

Each of these screenshots show the same image twice – at 16,7% and at 100%.

Once a Curves Layer is active, in the second screenshot it is hidden.

Note that the type in the image is unaffected at 100% while at 16,7% is seems to get darker or broader.

patrickh27764550Author

Inspiring

Yes - that is exactly what is happening.

And you say that this is becasue, while my image is a grayscale as far as PS is concerned, it only has one color, solid black, "000000."

And the reason I think I see adjustments when zoomed out is becasue PS uses those "Stand Ins" that you mentioned above to reduce the resolution in the view only to make it load faster. OK, I get it now.