Photoshop :: Levels Preview On Channel Is Different To Result?

Mar 22, 2013

In CS3 I use a Dust & Scratches filter on a layer in a high resolution (3200+ppi) 16bpc image, then traditionally change the layer blend mode to Difference, make a duplicate of a channel which has the clearest information of where the filtered changes were made, and use levels to increase the contrast on a copy of that channel. Occasionally I get this result though - the Levels adjustment preview shows spots clearly, but clicking OK results in something very different from the preview. This only seems to happen occasionally.and result looks like this:

As the purpose of the channel is to make a mask, the result isn't as good as I'd like. I assumed that the problem might have been the grey starting colour of the channel, so I pushed the 0 up to 9 in an attempt to get a uniform K value of 100% on the darkest areas, and then ran a second Levels adjustment to make the white spots brighter. The second levels adjustment resulted in pretty much the same result as above, again, not what was shown in the preview. I also assumed that it may be down to numbers and that levels is occasionally too limited to deal with all the shades of grey on a 16 bit channel. Probably wrongly as this normally works exactly as required.
 
This only happens occasionally, and isn't that big a deal - I can quite happily go and use a Curve instead. I'm just wondering why the preview in the adjustment window is different from the actual result. The fact that it only happens on some of my images is what concerns me - purging all beforehand does not make any difference.how to get accurate results in the preview? Is the preview using a different method to show the results? Unfortunately I won't have a copy of CS6 to try this on until a couple of weeks from now, so not sure the best way for someone to try and replicate it on newer versions.

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Dec 12, 2012

I've recently tried using the Photoshop HDR feature. I have selected three different exposures in Lightroom and chose to merge them as an HDR image. All went well until the preview. I've found some settings that work really well. I've decided to go for the 16-bit path, not using Lightroom's 32-bit image capability, and let Photoshop do the tone mapping for now.
 
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how to specify a layer as alpha mask either.

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Jan 2, 2014

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Sep 3, 2012

A feature notably absent from the Oil Paint filter is any way to temporarily disable the effect (e.g., not preview it).I happen to like using Oil Paint to make refllections in the surface of water smoother and more "liquid" (which involves turning off the "Shine"), and it would really be nice if I could easily gauge the amount of the effect easily by blinking back and forth between original and processed image with a quick "disable preview" functionality.
 
With most standard filters, one can either uncheck a [ ] Preview box, and/or click the mouse button down on the image to temporarily show what the image is like without the effect.Yes, I know I can turn the Stylization down to 0.1 and see how a very minimal amount of the effect can be  applied.  And I can look at the original image in Photoshop proper, but of course that can't be zoomed while the Oil Paint filter is active.
 
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Mar 28, 2012

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I took a picture with my cell phone and it looks better.I have never tackled anything like this before and was wondering if there is a standard way of improving this kind of picture to look more like a photo.

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Jul 31, 2012

Ps CS6
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I have a big problem in my adobe software (Photoshop and Fireworks by-example). When, for example, I backup my project psd, short layers that I did well at the opening of what I save almost all my layers are disorders .
 
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Jun 2, 2013

I recently bought a Nikon D7100. I took some test shots and imported the images to Lightroom 4.4, then generated 1:1 previews for all the images.
 
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Moving to Develop View produces a higher-resolution 1:1 preview.  The image below is a screen shot of the Develop preview:

Look at the bricks and window screens to see the difference.
 
This difference occurs immediately after import (with a User Preset applied during import).  Once any Develop work is done, the Library preview updates and displays at full resolution.
 
This problem makes doing initial editing/selection of images time consuming, because I can't determine the sharpness/quality of imported images until I've done some kind of Develop adjustment on each image.

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Jan 2, 2014

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Sep 28, 2012

One thing I don't like when you do a search and some results are included in stacks of version sets, it that you are shown the best matches with the non matches indicated by a special icon. Then you can't have the option to 'select only best matches'.

An example : Suppose you usually shoot raw and keep only the best edited jpeg in a version set together with the original raw.  You want to delete the original raws when there is an edited jpeg in the version set. You can perfectly use the search by details for files in a version set and filename with the raw suffix.
 
How can you select only the 'best matches' in the result of the search ? Unless there is a way to do that easily, I would like to introduce a feature request to add 'show only best matches in stacks/version sets' in the option menu of the result of the search.
 
You could :
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- remove the temporary keyword.

That would work for version sets with only one original and one edited jpeg, not for multiple files in a stack or version sets, the info about stacks or sets would be lost.The only method I have found to do the selection and deletion with keeping stacks and version sets is:

- create a catalog copy (copy of the whole catalog folder)
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- in the old catalog, find missing files and delete them from catalog.

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Mar 29, 2014

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exclamation mark at the top right hand corner of the photos in grid view.
 
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May 20, 2013

After working on a complex, multi-layer image, if I save the result as PSD and not as XCF, will I lose anything when I return to the file later?

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Sep 27, 2012

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Nov 2, 2013

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Apr 11, 2008

I can no longer adjust levels. I go to Layer / New Adjustment Layer / Levels and get the box that says "New Layers" and asks "Name" (Levels 1) "Color" (None) and "Mode" (Normal). No changes here.

I click "Ok" and instead of giving me the box with the histogram, it adds a layer to the Layers Control box and gives me an eyedropper with instructions "Click image to choose a new color" If I click on the image, it changes the foreground/background colors but nothing in the image. I can't get out of this dialogue without closing the application using the Windows Task Manager.

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Jun 20, 2008

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Jul 1, 2012

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Jun 14, 2012

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