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Actioning a high-frequency edge mask

From: Photoshop CS3 Sharpening Images

Video: Actioning a high-frequency edge mask

In this exercise I am going to show you how to create a high frequency edge mask here inside Photoshop and we are going to save the creation the edge mask is in action so that you can play it back very easily in the future. Now I am still working inside that same High freq cityscape.PSD image that I opened and modified using the Smart Sharpen filter in a previous exercise and in this exercise what we are going to do is, we are going to Alt+click or Option+click on the filter mask in order to display the filter mask on screen here, so that we can keep track about modifications.

Actioning a high-frequency edge mask

In this exercise I am going to show you how to create a high frequency edge mask here inside Photoshop and we are going to save the creation the edge mask is in action so that you can play it back very easily in the future. Now I am still working inside that same High freq cityscape.PSD image that I opened and modified using the Smart Sharpen filter in a previous exercise and in this exercise what we are going to do is, we are going to Alt+click or Option+click on the filter mask in order to display the filter mask on screen here, so that we can keep track about modifications.

Notice that I am way zoomed in on this left hand cab, I will go ahead and zoom out a little bit to the 100% zoom ratio. Lets go over to the actions palette once again you should still be working, if you have been working along with me you should have a sharpening actions folders and action set that you created and you should have an action already made that's called LF edge mask, I am actually going to call that LoF edge mask so that I can keep track of it a little bit more easily. Alright. Lets create another action this time by clicking on the sharpening action set to make sure that were adding this new action to the sharpening action set, then I will click on a little new page icon, and I will call this one HiF edge mask, so that I know its a high frequency edge mask and I will click record in order to begin the recording of this action.

Now we've already got the filter mask selected and displayed on screen, so I am not going to have a problem with recording the selection of that mask as a step. I am just going to I'mmediately set about modifying it now because this is a high frequency image we don't need to apply the median filter first in order to thicken up or goo up those edges. We are just going to dig right in with the Find Edges functions. So go up to the Filter menu, choose Stylize and choose Find Edges and the reason by the way that we are not applying the median filter is because we have so many tiny details nested right next to each other median would end up destroying those transitions.

Alright. So lets go ahead and apply Find Edges and that's going to of course find all the edges inside of the image. We need to invert our mask, so that the edges are white and non-edges are black you do that by pressing Ctrl+I or Command+I on the Mac. Now again we do not have to visit the levels Command because if you were to bring up levels, so I'll go ahead and press Ctrl+L or Command+L on the Mac, you'll see that you have tapering group of colors here inside this histogram that goes all the way to white and we have some very strong whites over here on the right hand side of the histogram as well.

So theres no reason to modify the histogram at this point because we didnt apply the median filter in advance. So just go and cancel out it there and because you clicked the cancel button, levels is not reordered as a step inside the action. The only other modification we need to apply is a little bit of blur, I just want to slightly blur our edge mask at this point. We don't thicken up the edges, because again we have very tight details inside this image. So lets go up to the Filter menu, choose Blur and then choose Gaussian Blur and I want you to apply a low Radius value just one pixel, will do the trick and then click OK and that's all there is to it.

Now just go ahead and click on the stop button so these far fewer steps involved in creating a high frequency edge mask than a low frequency edge mask and we are now done. There is our high frequency edge mask action. Now you can go ahead and back step, if you want to bring to, lets bring up the History palette and we'll back step to before Find Edges to this step that says, Enable all Smart Filters right there. Now lets switch back to actions and lets go ahead and apply our HiF Edge mask action by Alt+clicking. First of all we need to make sure that we are editing the right portion of the document.

So Alt+Click or Option+Click on the filter mask here inside the Layers palette and then select your action and click on the Play button in order to play it and you should have this nice filter mask right there. Alright. Lets go ahead and hide the action palette Alt+Click or Option+Click once again on this filter mask in order to display the full color RGB image and you can see that we have smooth the way much of the noise that were bringing out using Smart Sharpen. So this is what the Smart Sharpen effect looks like. Before I Shift+click on that edge mask, I'll turn it off and you can see that were bringing out all kinds of noise inside the image.

So lets zoom in even farther so you can see how much noise is brought out, its just terrible actually and I'll Shift+click again it turned the layer mask on and all that the noise goes away, as a function of that the high frequency edge mask, its a wonderful thing. Now lets see what the image looks like with and without the Smart Sharpen Filter, this is without and this is with. So you can see you are not harming the smooth edges of the cab at all, we are just bringing out the actual edge detail. Now we are bringing in out too much because we have bunch of clipped highlights and shadows that were also bringing out a lot of color noise.

Now we are going to take care of both of those problems with a very simple blending modification in the next exercise.

Show transcript

This video is part of

Image for Photoshop CS3 Sharpening Images
Photoshop CS3 Sharpening Images

115 video lessons · 16967 viewers

Deke McClelland
Author

 
Expand all | Collapse all
  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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