3 Replies Latest reply on Nov 9, 2013 1:30 PM by ssprengel

    Bizarre bug in Camera Raw 7.3 or Adobe Algorithms??? Grayed out areas of the image

    DanielT1974

      When converting raw files from Nikon D600 using CR 7.3 parts of the image appear grey and save that way. Converting to TIFF using Adobe DNG Converter didn't help but viewing and saving to TIFF in Preview showed none of the artifacts. Very bizarre and I am really looking forward to an explanation and hopefully a fix! Tried it on two machines now - same problem!!

       

      NIK_1307_2.jpg

        • 1. Re: Bizarre bug in Camera Raw 7.3 or Adobe Algorithms??? Grayed out areas of the image
          ssprengel Adobe Community Professional & MVP

          It looks like the purple defringing is not set properly for the image.

           

          Looking at the JPG with EXIFtool, the purple defringing Amount value is quite high, and the purple defringing range (Lo and Hi) is quite wide:

           

            Defringe Purple Amount: 19

           

            Defringe Purple Hue Lo:    19

           

            Defringe Purple Hue Hi:     96

           

          Defringing works by desaturating a range of colors, so try setting the purple defringing Amount to 0 to see if the issue resolves, then adjust the values more conservatively.

           

          If you are unaware of the purple defringing, entirely, it is in the Manual lens corrections area, and perhaps you have set your camera-raw defaults improperly, with aggressive defringing amounts.  The defringing is probably something that should be zero as a default, and set, per image, where it doesn’t extend into normal image details.

          • 2. Re: Bizarre bug in Camera Raw 7.3 or Adobe Algorithms??? Grayed out areas of the image
            DanielT1974 Level 1

            Thank you very much!!! The problem did indeed disappear when the CA correction slider was set to 0. I had never seen this behavior before though - huge parts of the face and hands on another photo turned grey! But much better now (still hoping for a more robust CA correction algorithm one day).

            • 3. Re: Bizarre bug in Camera Raw 7.3 or Adobe Algorithms??? Grayed out areas of the image
              ssprengel Adobe Community Professional & MVP

              The example photo had Defringe values were set too extreme for the picture content.   Here is a lynda.com video that shows how to back things off based on what you see on screen:

              http://www.youtube.com/watch?v=cMfoLcfn8W8

               

              Images should initially be opening with zero Amount values for Defringing.  This is how my defaults are:

              2013-11-09_152038.jpg

                If not, then reset your camera raw defaults to the factory defaults:

              2013-11-09_151822.jpg

              After doing this, then if you really want something different than the factory defaults, open a new image, set those values and use the Save New Camera Raw Defaults item just above.