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Building your own Smart Sharpen with Lens Blur

From: Photoshop CS3 Sharpening Images

Video: Building your own Smart Sharpen with Lens Blur

Alright gang, in this exercise we are going to be Daniel Booning it again. We are going to be doing it old style. This time around we are going to be building Smart Sharpen using nothing more than the Lens Blur filter in one case and the Motion Blur filter in another case. So this is not a technique that I am suggesting you use; this is complete and total theory. The only reason I offer it because it helped me understand how Smart Sharpen is put together and it help me know how to use the filter. So presumably it is going to help some of you as well if you think like me. God forbid. So what I have got here is this document called More testing.PSD and that's found inside the 03 sharpen filters folder.

Building your own Smart Sharpen with Lens Blur

Alright gang, in this exercise we are going to be Daniel Booning it again. We are going to be doing it old style. This time around we are going to be building Smart Sharpen using nothing more than the Lens Blur filter in one case and the Motion Blur filter in another case. So this is not a technique that I am suggesting you use; this is complete and total theory. The only reason I offer it because it helped me understand how Smart Sharpen is put together and it help me know how to use the filter. So presumably it is going to help some of you as well if you think like me. God forbid. So what I have got here is this document called More testing.PSD and that's found inside the 03 sharpen filters folder.

Notice that it's got a flatten version of the serpentine line with the texture background, blah, blah, blah. And in front of that we have two Smart Sharpen variations, hence the ss, and then the x means either the Lens Blur variation or in the case of MB, we have got the Motion Blur variation. So with Lens Blur, I have applied- I'll go ahead and zoom-in so we can really see the effect there. With Lens Blur, I have applied an Amount value of 100, as you can see over here in the layer name, and a Radius value of 12. Note that by the way, 12, because we'll be approaching this a little differently with Lens Blur.

Then with Motion Blur, I will go ahead and turn it on and notice that it will shift slightly on screen there. You can see that now we have a directional blur going on so that its appearing just on the right and left side. So that is a directional effect as what should I say and that's both with the dark halo and the light halo instead of omni-directional, that is surrounding the entire circle. So that is SSxMB 100 for the Amount value, 20 for the radius time and then 0 for the angle. So lets go ahead and build these ourselves using nothing more than, in this case the Lens Blur filter and a nine volt battery.

In another words, we are getting very rustic here. I am going to go ahead and select the Background layer; the other two layers are turned off. Then I am going to press Ctrl+Alt+J or Command Option+J in the Mac in order to jump this layer and name it of course. I will call this one Lens Blur and this time its going to be a Lens Blur with a Radius value of 24. Now notice how that compares with the Smart Sharpen filter set to Lens Blur, we are using the Radius value of 12. I was telling you how the Lens Blur radius is more subtle than the Gaussian Blur radius.

Well it's so subtle that you actually have to double the Lens Blur to even get there. So Lens Blur is just a more subtle filter in the first place. So go ahead and click OK so its actually twice the Radius value. Then I am going to go up to the Filter menu, I am going to choose Blur and I am going to choose Lens Blur. Now the whole idea behind Lens Blur is that its simulating actual optical blur, the kind of blur you would get if you unfocused your camera; if you want to focus on, for example, a background that would be a Lens Blur. So I'll go ahead and choose that very different from a Gaussian Blur, much more complicated as you can see as well.

These are the default values you are seeing here. I am just going to change one value. Assuming default settings, I am just going to change the Radius value to 24, we are going to leave everything else set the way it is. So Shape is Hexagon, Blade Curvature is 0, Rotation is 0. Look at the values, make sure those are same as yours then if you are following along with me, of course, then click OK in order to apply that Lens Blur. Now I am going to create another duplicate of the Background layer by pressing Ctrl+Alt+J or Command Option+J on the Mac and we'll call this one Orig minus LBlur this time around and I'll drag it to the top, we are going to go to Apply Image under the Image menu.

And I am going to change the Layer from Merged, I certainly don't want; I want it to be Lens Blur 24 and we are going to go ahead and subtract, the Blending should be set to Subtract, Invert should be turned off and these are values you should be set the way you see them then click OK. Notice we get a very subtle effect this time around. I am going to go ahead and zoom-in so you can see that a very subtle highlighting effect right there. Now we need to apply it to the original image so lets go back to the original image, Ctrl+Alt+J, Command Option+J on a Mac, and I am going to go ahead and call this guy Orig+(O-LB) this time around and then I'll click OK in order to accept that.

Move it to the top of the stack, go up to the Image menu, choose the Apply Image command. I am going to go ahead and change the layer this time around to this guy, Orig minus LBlur, and we are going to add it of course in order to get a highlight effect as you are seeing there. Click OK in order to accept that. Now once again, we are going to go back to the Background layer and going to press Ctrl+Alt+J, Command Option+J on the Mac to jump it, we are going to call this one Orig plus LBlur. Click OK, go ahead and move that guy to the top of the stack.

Go up to the Image menu, choose the Apply Image command and I am going to change the layer this time around back to Lens Blur. We are going to turn on the Invert checkbox and we are going to leave the Blending mode set to Add. You can see that we have these nice dark haloes this time around. I will click the OK button in order to accept that modification. Lets go to Orig+(O-LB), press Ctrl+Alt+J, Command Option+J on the Mac and we'll change the name of this new layer to - and this will be O+ LB and then oopsactually, inv. We want invert. I didn't add this time around, we do want to invert.

That will be the name and click Ok and of course, layer names aren't absolutely essential, you get the layer name, right? We are just going for a technique here- not a technique, just some theory. So I move that guy to the top of the stack. Lets go up to the Image menu, well choose the Apply Image command. I am going to change the layer to Orig plus LBlur and I am going to make sure that the Invert checkbox is turned on still and I am going to change this guy to Subtract. So the Blend mode is Subtract this time around. To invoke the dark halos, click OK and that is the finished effect. Now lets go ahead and compare it to Lens Blur to SSXLB 100/12.

I'll go ahead and turn on that layer and you can see its identical; exactly the same effect. The one weird thing that you have to do is you have to double that Lens Blur value. So Smart Sharpen goes ahead and doubles the effect of the Lens Blur as it applies it, that's the only difference. That's how you create the Smart Sharpen filters, the Lens Blur variation using just the Lens Blur filter. It turns out you can do exactly the same if you have a mind to. You can follow those exact steps and do the very same thing with Motion Blur with the Motion Blur filter. Abd I'll just go ahead and show you under the Filter menu, you got to Blur and you got a Motion Blur, this guy right there.

You run through the exact same steps and you will get the Motion Blur variation of Smart Sharpen as well. So that's where those function come from,. So Smart Sharpen, just like Unsharp Mask, is using Gaussian Blur in order to invoke a sharpening effect, Smart Sharpen is using either a Gaussian Blur or Lens Blur or Motion Blur to invoke its sharpening effect as well. In the next exercise, I am going to show you yet another way to account for Motion Blur inside of an image but this time we'll use the Emboss filter.

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This video is part of

Image for Photoshop CS3 Sharpening Images
Photoshop CS3 Sharpening Images

115 video lessons · 16995 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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