6 Replies Latest reply on Jan 25, 2018 6:49 PM by yataoz51436689

    Photoshop does not show proper colours

    yataoz51436689

      I have a raw image and I open it in photoshop. After I bring down the exposure, the sky showed some weird colours.  However, after I saved the edited image, it looked normal. I also tried decreasing the exposure of the same image in Lightroom, and there is no such problem.

       

      Screen Shot 2018-01-25 at 9.23.33 PM.pngScreen Shot 2018-01-25 at 9.24.07 PM.pngScreen Shot 2018-01-25 at 9.24.02 PM.png

        • 1. Re: Photoshop does not show proper colours
          c.pfaffenbichler Level 9

          Please read this (in particular the section titled "Supply pertinent information for quicker answers"):

          http://forums.adobe.com/docs/DOC-2325

           

          In Photoshop did you use Adjustment Layers?

          Did you view the image at View > 100%?

          Could you please post a screenshot taken at View > 100% and with the pertinent Panels (Layers, Channels, Options Bar, …) visible?

          Does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue?

          • 2. Re: Photoshop does not show proper colours
            D Fosse Adobe Community Professional & MVP

            Where does the second screenshot come from? Which application/photo viewer is that?

             

            Banding like this happens when you don't have sufficient bit depth, somewhere in the pipeline. 8-bit data only have 256 individual discrete levels, and if you twist those levels in an extreme adjustment you still only have 256 levels - but they are now much further apart. So you get visual stepping.

             

            The first thing is to always open in 16-bit depth from ACR, not 8-bit. A 16 bit file has 32 000-ish individual levels and no banding in the image data.

             

            Banding can also happen in the adjustment itself - if you are using a selection to do the adjustment. Selections are always 8 bit, even in a 16 bit file. This is just a historical leftover (that will hopefully one day be history altogether).

             

            Finally, there can be banding in the display system - calibration correction tables, the monitor profile, the video driver, or the panel itself. The video pipeline is also limited to 8-bit color depth. An application/viewer without color management bypasses some of these.

             

            Finally, all these can work together and exaggerate the issue. I suspect that's happening here.

            • 3. Re: Photoshop does not show proper colours
              yataoz51436689 Level 1

              Thanks!

              With View>100%, the problem disappeared.

              I tried disabling GPU and it did not work.

               

              Is there any way to fix this? It is very annoying because I have to zoom in to avoid this problem and I can't see the whole image with proper colours during editing.

               

              Screen Shot 2018-01-25 at 10.11.47 PM.png

              Screen Shot 2018-01-25 at 10.13.46 PM.png

              • 4. Re: Photoshop does not show proper colours
                yataoz51436689 Level 1

                Thanks!

                The second screenshot came from Lightroom. I viewed the Photoshop saved image in Lightroom. I think this problem only shows up when the view scale is small. Don't know how to fix this though.

                 

                But I wonder why there is no such problem in Lightroom. Lightroom shows the true colours even with very small images.

                • 5. Re: Photoshop does not show proper colours
                  D Fosse Adobe Community Professional & MVP

                  OK, thanks for reporting back. This is a bit odd, and I can't say I've run into this particular issue before. It does sound like a combination of 8-bit preview at small sizes and a video driver inaccuracy.

                   

                  Just out of curiosity - can you try to set GPU to "Basic" mode in PS Preferences? This shifts display color management from the GPU back to the CPU, which is the traditional and often more reliable way. I have a hunch that might display correctly, although you may lose some advanced features.

                  • 6. Re: Photoshop does not show proper colours
                    yataoz51436689 Level 1

                    The "Basic" mode didn't work still. Could you please download the raw file and open it on your PC with Photoshop? Create an Adjustment Layer of Brightness/Contrast and bring down the brightness. I want to know if this is a common problem or it just happens on my machine due to the banding issue you talked about. Thanks very much!

                     

                    Image file:

                    DSC_3928.NEF - Google Drive

                     

                    Please click "download" to download the original raw file, not "Save image as", which will make it a JPEG.