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Downplaying color artifacts and clipping

From: Photoshop CS3 Sharpening Images

Video: Downplaying color artifacts and clipping

Alright. So here we are looking at the obnoxiously sharpened image at this point and in case you want to bring that obnoxiously sharpened image up on your screen. I've saved a catch up document called Smart Sharpen and edge mask.PSD which is found inside of the 06_For_Detail folder. Now it's an over the top sharpening effect. It looks pretty nasty on screen at this point. Despite the fact that we have this wonderful edge mask in play. Some of the reasons are, if we zoom in on the cab here, you can see that we have got some pretty nasty edges going on.

Downplaying color artifacts and clipping

Alright. So here we are looking at the obnoxiously sharpened image at this point and in case you want to bring that obnoxiously sharpened image up on your screen. I've saved a catch up document called Smart Sharpen and edge mask.PSD which is found inside of the 06_For_Detail folder. Now it's an over the top sharpening effect. It looks pretty nasty on screen at this point. Despite the fact that we have this wonderful edge mask in play. Some of the reasons are, if we zoom in on the cab here, you can see that we have got some pretty nasty edges going on.

For one thing, we have a lot of color artifacts showing up. For example, along the side of this shadow that's being cast by the mirror, the rear view mirror here. It's got a very harsh edge, as you can see, and we've red going along one side of the edge and sort of blue going on, a little bit of blue going on the left side of the edge. So we have that color artifact. We also have some clipped highlights and some clipped shadows so some very nasty halos going on inside of the image.

We can temper both of those problems to a certain extent. We don't want to completely get rid off our halos, we just want to down play them and we will do that by changing the blending options. So go over to the Layers palette and you'll see that you have in the case this image anyway, I've got the cabs and the city Smart Object, then I've the Smart Sharpen filter applied to it as the Smart Filter of course, and I've got the Filter Mask. Next to the word Smart Sharpen, it's a little blending icon, go ahead and double click on it to bring up the Blending Options dialog box and it may take a moment and you may get this progress bar because there's a lot going on inside of this image, aggressive application of the Smart Sharpen filter with the More Accurate check box on, which takes more time to apply.

Now I want you to change mode from Normal to, of course, Luminosity. Right, that's the first step in order to get rid of the color artifacting and notice how that just went away. We got rid of that weird red edge there and we down played the blue edge as well. So we still have a little bit of coloring going on but not nearly what we've before. Next, I want you to change the Opacity value to 66%. This is going to workout beautifully for us and you can see how those clipped wide edges, go back into the visual range. So they are no longer cliped, they are no longer absolute white.

They are now obvious highlights, but they are visible highlights. Alright. AlSo by the way, we have down played the shadows, so that helps and I'll click OK in order to accept that modification. So just to give you a sense of what a big difference that very simple change made, this is before- see how we have got those edges going on. I'll zoom in even farther so you can really check it out there. You can see those brightly colored edges and you can see those blown highlights as well and this is after much more tempered, I shouldn't say much because it is a fairly subtle effect, but it makes a big difference.

I'm going to press Ctrl+Alt+0 or Command+Option+0 to zoom out to the 100% view size and just so we have a sense of what we have accomplished here, this is the image as it appears without all of the Smart Sharpen stuff going on and this is the image after applying Smart Sharpen. So even though we've applied these very aggressive settings its a fairly subtle modification even at a 100% and if you zoom out a 50% its a subtle modification indeed. This is before and this is after, but it does make a difference.

It does sharpen up those tiny little details inside of the image. I'm going to go ahead and Shift+Tab away my palettes and zoom out to 25% so we can take in the entire sharpened cityscape and you can see at this sides here, this is not an over-sharpened image at all and in fact, it will print very well, especially after we add an application of output sharpening in a couple of chapters. In the next exercise, we are going to take a quick look at a medium frequency image and then after that we are going to see how we can balance multiple images sharpened for details and multiple images on multiple layers at the same time.

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This video is part of

Image for Photoshop CS3 Sharpening Images
Photoshop CS3 Sharpening Images

115 video lessons · 17017 viewers

Deke McClelland
Author

 
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  1. 50m 30s
    1. Why every image needs sharpening
      2m 38s
    2. Understanding the effects of sharpening
      5m 26s
    3. Understanding the mechanics of sharpening
      4m 19s
    4. Understanding sharpening and gradual transitions
      3m 21s
    5. Understanding sharpening and noise reduction
      4m 0s
    6. Understanding amount and radius
      7m 50s
    7. Measuring your screen resolution
      6m 19s
    8. Using reliable zoom ratios
      5m 30s
    9. Calculating the actual print size
      4m 54s
    10. Gauging the ideal sharpening settings
      6m 13s
  2. 59m 31s
    1. Everyone knows you sharpen last (and everyone is wrong)
      1m 8s
    2. Understanding the conventional sharpening workflow
      5m 4s
    3. Flattening and saving to TIFF
      6m 39s
    4. Downsampling (and why you shouldn't upsample)
      6m 8s
    5. Understanding last-step sharpening
      6m 44s
    6. Recognizing problems with the conventional workflow
      9m 38s
    7. Erasing sharpening with the history brush
      4m 30s
    8. Using alternative sharpening workflows
      2m 37s
    9. Sharpening a scanned photograph shot on film
      2m 45s
    10. Sharpening a digital photograph
      3m 6s
    11. Sharpening specific details
      3m 43s
    12. Finding broad workflow conclusions
      2m 49s
    13. Learning that technique trumps timing
      4m 40s
  3. 1h 27m
    1. Comparing and contrasting neighboring pixels
      1m 6s
    2. Using the Gaussian Blur filter
      4m 25s
    3. Using Gaussian luminance distribution
      4m 47s
    4. Using the Unsharp Mask filter
      4m 54s
    5. Understanding the history of Unsharp Mask
      3m 51s
    6. Building your own USM with Gaussian Blur
      7m 35s
    7. Using the Smart Sharpen filter
      7m 35s
    8. Compensating for camera shake
      8m 50s
    9. Building your own Smart Sharpen with Lens Blur
      6m 59s
    10. Using directional sharpening with Emboss
      9m 13s
    11. Using Smart Sharpen extras
      8m 56s
    12. Using Convolution Kernels for more accuracy
      7m 8s
    13. Using the High Pass filter
      7m 32s
    14. Using Luminance Sharpening
      5m 5s
  4. 2h 14m
    1. Smoothing filters, smart objects, and masks
      1m 25s
    2. Using the Median filter and Dust and Scratches
      7m 7s
    3. Using Smart Blur and Surface Blur
      6m 12s
    4. Using the Despeckle filter
      8m 17s
    5. Softening flesh tones selectively
      10m 15s
    6. Using the Reduce Noise filter
      7m 27s
    7. Combining smoothing and sharpening
      8m 24s
    8. Making an image into a smart object
      9m 24s
    9. Applying editable smart filters
      6m 8s
    10. Combining two smart filters
      8m 5s
    11. Assigning a filter mask
      5m 59s
    12. Nesting one smart object inside another
      10m 32s
    13. Employing a static High Pass layer
      8m 59s
    14. Matching static pixel-level edits
      4m 37s
    15. Avoiding clipping with luminance blending
      9m 7s
    16. Sharpening and smoothing
      6m 36s
    17. Making an edge mask
      8m 14s
    18. Making a non-edge mask
      7m 17s
  5. 1h 33m
    1. Sharpening with Adobe Camera Raw
      1m 29s
    2. Introducing Camera Raw (4.1 or later)
      8m 13s
    3. Understanding why to sharpen for source
      5m 14s
    4. Using Camera Raw’s sharpening control
      5m 52s
    5. Previewing limitations and tricks
      6m 45s
    6. Why downsampling doesn’t work
      3m 12s
    7. Reducing chromatic aberration
      7m 30s
    8. Using the Defringe option
      3m 32s
    9. Understanding high frequency, low radius
      5m 21s
    10. Raising the Detail value
      3m 6s
    11. Using on-the-fly edge masking
      5m 41s
    12. Sharpening a low-frequency portrait
      6m 36s
    13. Eliminating color noise
      4m 47s
    14. Reducing luminance noise
      4m 42s
    15. Correcting “false sharpening”
      7m 15s
    16. Reducing shadow noise
      5m 22s
    17. Approximating ACR sharpening in Photoshop
      8m 35s
  6. 59m 8s
    1. Gauging and exploiting luminance frequency
      1m 27s
    2. Using low-frequency source sharpening
      5m 53s
    3. Using High Pass for portraits
      4m 19s
    4. Actioning a low-frequency edge mask
      7m 42s
    5. Modifying the source sharpening
      5m 21s
    6. Using high-frequency source sharpening
      5m 26s
    7. Using Smart Sharpen for cityscapes
      3m 2s
    8. Actioning a high-frequency edge mask
      5m 4s
    9. Downplaying color artifacts and clipping
      4m 4s
    10. Sharpening a medium-frequency image
      5m 24s
    11. Sharpening a layered composition
      7m 16s
    12. Sharpening for multiple frequencies
      4m 10s
  7. 1h 8m
    1. Who needs dull when you have sharp?
      56s
    2. Focusing in on a person’s eyes
      4m 22s
    3. Blurring the area outside the eyes
      4m 22s
    4. Sharpening eyes and other details
      5m 38s
    5. Darkening the lashes and eyebrows
      7m 13s
    6. Sharpening dark-haired people
      5m 2s
    7. Edge mask and emphasize
      3m 39s
    8. Nesting a Smart Sharpen effect
      4m 48s
    9. Density mask sharpening
      5m 35s
    10. Adding depth of field
      4m 39s
    11. Sharpening a background
      4m 23s
    12. Masking background from foreground
      8m 51s
    13. Eliminating halos around a person
      5m 38s
    14. Deepening and warming a background
      3m 28s
  8. 1h 18m
    1. Reverting back to convention
      1m 37s
    2. Understanding the use-neutral composition
      4m 15s
    3. Restoring much-needed antialiasing
      4m 2s
    4. Reducing noise in a high-frequency image
      7m 24s
    5. Making a third-level smart object
      3m 55s
    6. Preparing an image for print
      5m 18s
    7. Using ideal settings for commercial reproduction
      5m 37s
    8. Calculating very large-format settings
      5m 11s
    9. Using ideal settings for inkjet output
      4m 26s
    10. Sharpening for commercial reproduction
      5m 45s
    11. Sharpening for inkjet output
      4m 58s
    12. Revealing high-frequency multipass sharpening
      5m 21s
    13. Using Gaussian Blur to sharpen hair
      5m 41s
    14. Flatten, Save As, Resample, and Sharpen
      5m 9s
    15. Revealing low-frequency multipass sharpening
      3m 30s
    16. Sharpening an image for web or screen
      6m 22s
  9. 1m 50s
    1. Goodbye
      1m 50s

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