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  • Sharpening Images

    I recently posted a thread asking for advice on improving contrast within materials in architectural retouching. I was given some good advice and recommended some plug in filters as well as the high pass filter in conjunction with overlay. This was all very helpful and I have implemented some of these techniques with positive results. I was also told to address sharpening as well as contrast. On the subject of sharpening there are often areas of an image which are not as sharp as the files are shot on a view camera with lots of shift movement to enable multiple stitches. This often results in soft areas of an image. I know very little about sharpening in photoshop and was hoping that someone might be able to offer some good techniques to help balance the sharpening of an image. How do I get really sharp edges? is it best to take a healthy channel selection and sharpen that as apose to all rgb? what is the best suited sharpen filter for architectural and interior style imagery? can sharpening be applied to a neutral grey overlay layer or must it be applied to an image layer?

    any help on these matters would be most appreciated and really helpful


    Norris

  • #2
    Re: Sharpening Images

    Hi Norris

    if you could post an image up of the problem, I am sure the members
    could help you out with some advice to your problem with sharpening

    Comment


    • #3
      Re: Sharpening Images

      I have attached a section of the image that I feel is most noticable. It becomes very soft around the foreground of the extractor fan (unfortunately this is maybe a little harder to see on this 100kb jpeg)
      Attached Files

      Comment


      • #4
        Re: Sharpening Images

        It seems to be the photog used a low aperature so your focal depth is pretty narrow. The focus seems to be on the door frame. To add focus you may want to search for some of Calvin Hollywood's methods. His sharpening through blurring would probably give you the effect you want.

        Comment


        • #5
          Re: Sharpening Images

          Originally posted by Norris View Post
          I recently posted a thread asking for advice on improving contrast within materials in architectural retouching. I was given some good advice and recommended some plug in filters as well as the high pass filter in conjunction with overlay. This was all very helpful and I have implemented some of these techniques with positive results. I was also told to address sharpening as well as contrast. On the subject of sharpening there are often areas of an image which are not as sharp as the files are shot on a view camera with lots of shift movement to enable multiple stitches. This often results in soft areas of an image. I know very little about sharpening in photoshop and was hoping that someone might be able to offer some good techniques to help balance the sharpening of an image. How do I get really sharp edges? is it best to take a healthy channel selection and sharpen that as apose to all rgb? what is the best suited sharpen filter for architectural and interior style imagery? can sharpening be applied to a neutral grey overlay layer or must it be applied to an image layer?
          any help on these matters would be most appreciated and really helpful
          Norris
          One way ..
          I selected the areas to be sharpened and copied the selection to an alpha channel; with this selection active on a duplicate layer, I applied Smart Sharpen in CS4 to a point where I was satisfied and hit OK; with the selection active again on another duplicate, I applied Sharpen/Sharpen edges and changed the blending mode to Darken. I also balanced the R,G and B channels with Levels which lightened and added some contrast to the photo.

          http://www.pbase.com/image/123074722

          Comment


          • #6
            Re: Sharpening Images

            For this noise image full of halos, I used surface blur + added noise(Imagenomic RealGrain) + masked the edges see http://img714.imageshack.us/img714/226/awea1.jpg


            See http://forums.dpreview.com/forums/re...ssage=28056183
            For hard edges “EdgeThrink” or deconvolution is good, but not on noise images...
            Good plug-ins for that are Turbo Photo “EdgeThrink”, Focus Magic, Akvis Enhancer or Photoshop Smart sharpen with more accurate enabled see http://members.ozemail.com.au/~binar...ersharpen.html

            Comment


            • #7
              Re: Sharpening Images

              Best sharpening method I've ever used is this:
              With image open in photoshop
              1/ go to Image/mode/lab colour
              2/ go to channels and select lightness channel only
              3/ Now use unsharp mask, or smart sharpen to sharpen your image
              4/ select all channels, and then convert back to rgb (Image/mode/rgb)

              This lets you apply far more sharpening, with much less noise/grain being added to the image.

              Hope that helps

              Comment


              • #8
                Re: Sharpening Images

                This may help or might not..

                Gleaned from here @ RetouchPRO to sharpen/enhance or bring out details

                1) Duplicate layer twice

                2) select the first duplicated layer (second from top) rename to G10
                run Gaussian Blur Filter @ 10 radius

                3) top layer name HP10 set to Linear light
                Run High Pass filter @ radius 10

                4) Select all and copy and paste into a NEW layer (Shft+Ctrl+Alt+E)
                Change mode to Luminosity

                5) I added this step to get rid of those pesky Halos... I used a Plug-in to Eliminate White

                6) Uncheck the eyeballs to the layers G10 and HP10 (deselect)

                7) adjust opacity of the new luminosity layer with white eliminated (mask this layer to only show certain elements if needed)

                Give the second image (Gif) a couple seconds to change... (notice the building out the window also)
                Attached Files

                Comment


                • #9
                  Re: Sharpening Images

                  Hi Norris

                  This is attempt to use unsharp mask + history brash
                  Attached Files

                  Comment

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