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Eliminating halos around a person

From: Photoshop CS3 Sharpening Images

Video: Eliminating halos around a person

In this exercise we are going to take care of that halo around this man's shoulders and around the top of his hair as well and to give you a sense to what I mean, let me show you what the final version of this composition is going to look like. It will look like this and you see that there is no halo dividing him from his background. Lets go and zoom in on that a little bit so that you can see the difference. There is the shoulder without any halo, here is the current version of the shoulder with a little bit of a halo. Notice that it's actually pretty noticeable, I think pretty obvious, and that white line around him that's encircling him here, this little bit of an aura is serving to divide him from the background, which is exactly the opposite of what we want.

Eliminating halos around a person

In this exercise we are going to take care of that halo around this man's shoulders and around the top of his hair as well and to give you a sense to what I mean, let me show you what the final version of this composition is going to look like. It will look like this and you see that there is no halo dividing him from his background. Lets go and zoom in on that a little bit so that you can see the difference. There is the shoulder without any halo, here is the current version of the shoulder with a little bit of a halo. Notice that it's actually pretty noticeable, I think pretty obvious, and that white line around him that's encircling him here, this little bit of an aura is serving to divide him from the background, which is exactly the opposite of what we want.

So we want it to look like this. We want it to totally go away. Now there is going to be a little bit of softness that replaces that halo instead that's OK that's better then the alternative. Alright. So anyway here we are at work inside of this composition and the name of this image if you are just showing me you want to catch on up is Sharper background.PSD found inside the 07_For_Effect folder. And actually I am going to zoom in to 50% so that we can see things very clearly here. I am to bring back up my Layers palette.

Now what's happening here, the reason this halo exists, is because the filter mask exactly traces this gentlemen's outline and that means that the Unsharp Mask command is calculating in the edge just ever so slightly. It's calculating the edge between him and the background and it is of course drawing a halo around the edge and because it's a very significant edge because there is so much contrast between the foreground and the background, this is a very obvious halo. So what we need to do is expand the mask outward.

We need the black portion of the mask, which is concealing the Unsharp Mask effect, we need to shift it outward a little bit, we need to spread it, as they say, so that we are covering up that halo essentially. So heres what we are going to do. Go ahead and select the filter mask by clicking on its thumbnail here inside the Layers palette. Then I want you to go up to the Filter menu choose Other and choose this guy right there, Minimum. And what Minimum does is it expands the minimum brightness value, which is black. So it's going to expand the black portion of the mask outward.

So go ahead and choose Minimum and I am going to expand the mask by a radius of 6 pixels. Now the reason I am going with six by the way, you may recall that we applied a Radius value, where Unsharp Mask was concerned, we applied Radius value of 4 pixels. This Radius value associated with a Minimum filter right here is one and a half times as much, so 150%, half again as much. So we had four before, now we've got six, this is basically what we are doing. If your Unsharp Mask value was 8 pixels then you would enter 12 into this Radius value.

You would divide 8 by 2 you would get 4 pixels and you'd add it to 8 and you get 12. Anyway that's what we are doing. Go ahead and click OK and that does tend to work best and notice that the halo goes away. I am going to go in zoom in on this portion of his shoulder here. This is the before version where the halo is tracing around him, this is after version where the halo goes away. It's replaced by a weird edge though. If I zoom in close, you can see that there is a little bit of sharp edge that's replacing that halo. So there is the halo from before, there is the weird sharp edge. Now that's no good, we need to blur that edge away.

So I am going to go up to the Filter menu- now this is a two parter, so pay attention here. Go up to the Filter menu, choose Blur and choose Gaussian Blur and I am going to match that Minimum value, which wouldnt be a radius of 120 pixels, it be just 6 pixels like so. So we are matching the Radius value that we assigned inside of Minimum and I will go ahead and click OK. So 6 pixels for Minimum, 6 pixels for Gaussian Blur in our case. Now that ends up blurring both inward and outward from the shoulder, which means that we could end up lightening the very edge of the shoulder a little bit and indeed we do. If you are working along with me, you may see on your monitor that you are kind of ruining the edge a little bit, making a mess of it.

So in order to make sure that we're only darkening this effect, so we are only blurring outward from the shoulder, not inward, I want you to go up to Edit menu and choose Fade Gaussian Blur or you can press Ctrl+Shift+F or Command+Shift+F on the Mac and I want you to change just the mode, the Opacity value is fine, change the mode to Multiply. So we are going to go ahead and fade it to Multiply like so and that's going to darken that edge and we will click OK. Now that brings back some of our wonky little Minimum edge that we had before. Once again its better then the alternative. And once we sort of zoom out from the image a little bit and once we print the image as well, we are not going to notice that edge at all.

So that's how we go about getting rid of that halo. If you are still troubled by the sharpness of the Minimum edge then rerun that Gaussian Blur effect. You can go ahead and choose from the Filter menu. You could choose Gaussian Blur again in order to run another pass of Gaussian Blur then you would go to the Edit menu choose Fade Gaussian Blur and again change it to Multiply. So you can rerun these effects multiple times in order to get a still smoother transition. Alright. So anyway this looks brilliant to me. I think everything is looking every, every good.

In the next exercise, we are going to make the background look darker. Right now it's sharper, but it is still very light. We are going to darken it up so it looks like this, using an adjustment layer. Stick with me.

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This video is part of

Image for Photoshop CS3 Sharpening Images
Photoshop CS3 Sharpening Images

115 video lessons · 17073 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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