Participant

Question

image adjustments don't apply [2013]

Forum|Forum|12 years ago
April 18, 2013
2 replies
25357 views

Hi,

I'm using CS4 photoshop on my iMac 2008. When I try to apply image adjustments like 'posterize' or 'Brightness/Contrast' or 'Levels' to my image, I can adjust the settings in each dialog box, and I see the changes on my image because the 'Preview' box is checked. But when I click 'OK', the image reverts to its original and no changes are applied to the image.

I started out by importing a .jpg into photoshop. I've tried working on this .jpg, and I've also converted to Photoshop file format .psd, and still the same problem occurs. The original image had colour, but I converted it to grayscale. I also tried not converting to grayscale, and still the same problem. I am trying to make the image high contrast, with only black and white (no grey).

The same problem also occurs when I apply my adjustments on adjustment layers. Here I am able to modify each adjustment layer. The image changes and looks the way I want. But when I go to save the image, no matter what format I save as (.jpg, .psd, or .tif) the resulting image has none of the adjustments. It's still the original.

Thanks for your help,

-David

This topic has been closed for replies.

D

defaultireffvldeou1

Participant

I'm having the same issue. I'm a teacher and I have 21 kids doing the same exact assignment with the same file size settings, and on ONE computer every time we make an image adjustment the preview shows what is supposed to happen but when we click OK the adjustments disappear completely. It's not the zooming on the preview, I've reset Photoshop settings, updated the version, started a new file and it STILL doesn't work. Something else that's curious... when we apply the adjustment as an adjustment layer we see the correct effect - but when we merge the two layers the affect disappears again. What is going on?!

D Fosse

Community Expert

Read my reply above again. It's still the same explanation.

The important thing to understand is that it's the flattened/merged version that is the correct one. The preview is wrong, for the reasons I explained.

What triggers this, when it happens, is the relationship between image pixels and screen pixels. So different screen resolutions/zoom ratios may be differently impacted. It happens with noisy or binary images where you have a lot of sharp pixel-level transitions. These get blurred on downsampling, producing pixel values that aren't really there in the full data.

Bottom line, again: always view at 100% for a reliable preview.

C

charles badland

Inspiring

Hello,

Does it help if you are viewing at 100% (View>Actual Pixels) as you make your adjustments? Preview at less than 100% can be misleading.

D

dav1dp0001Author

Participant

Thanks for your suggestion.

When I viewed at 100% and applied my adjustments, I saw that there was no change to the pixels of my image. But when I zoom out and look at the whole image, I see changes when I make my adjustments, and they do not save when I click 'OK'.

I am trying to make a two tone image, black and white, where there are no black pixels in the white sections. Even though posterize must have worked successfully, because there are only black and white pixels, there are still black pixels in the white sections, making all sorts of grey tones. This is unacceptable because I am preparing an image for screenprinting, and there needs to be solid black and solid white, no grey.

Using brightness and contrast, posterize, and levels, I am not able to achieve what I am trying to do. Is there some other way to do it? Based on what is happening to me, it seems like posterize, brightness/contrast, and levels do not work. When I adjust their faders in their dialog boxes, I see the changes in the preview image, and it looks like what I want. But when I click 'OK', it reverts to the original. It basically is not working. The same thing happens when I create adjustment layers. It looks fine and is working. But when I save to jpg, tif, or psd, the adjustment layer changes are not saved onto the final image.

-David

WendyAnn

Participant

If you search the internet for images of "Habitat 67", you should be able to find some better candidates.

I've had this issue happen too, were adjustments such as contrast and posterize effects appear to be working while you're making the adjustments, but then immediately revert back. In other words, they don't take effect. In the cases I've seen, it was always because the file was too large. When I reduced the file size, the effects would then work.

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