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Sharpening and noise reduction

From: Photoshop CS4 for Photographers

Video: Sharpening and noise reduction

Select the file shaun_tomson and you can find that in the Chapter 11, camera_raw folder, press Command+R on a Mac, Ctrl+R on a PC. Now what we are going to do here is we want to zoom-in on the face because we are going to work on some of the details of this image. We are going to look at how we can reduce some of the noise and also perform some of the sharpening. Now, at this particular zoom rate, the image looks pretty good to me. So I'll go ahead and click on my option for Detail. Now I see I have some options for Sharpening as well as Noise Reduction. Then I see this little note down here, Zoom to 100% or larger to see the effects of the controls from this panel. So I'll so that. I'll double click the Zoom tool and now I'm at 100% and now what's I get in this close, I see, Oh Gosh, there are quite a bit of problems I would have otherwise not even noticed, to let alone not even have been able to see with my controls.

Sharpening and noise reduction

Select the file shaun_tomson and you can find that in the Chapter 11, camera_raw folder, press Command+R on a Mac, Ctrl+R on a PC. Now what we are going to do here is we want to zoom-in on the face because we are going to work on some of the details of this image. We are going to look at how we can reduce some of the noise and also perform some of the sharpening. Now, at this particular zoom rate, the image looks pretty good to me. So I'll go ahead and click on my option for Detail. Now I see I have some options for Sharpening as well as Noise Reduction. Then I see this little note down here, Zoom to 100% or larger to see the effects of the controls from this panel. So I'll so that. I'll double click the Zoom tool and now I'm at 100% and now what's I get in this close, I see, Oh Gosh, there are quite a bit of problems I would have otherwise not even noticed, to let alone not even have been able to see with my controls.

Now in order to illustrate this, I'm going to zoom-in even further on the eye. So I'll click and drag over the eye so go to real close in on the eye. All right, well I see all of these color artifacts here, around the edge of the eye, in the eye, eyebrow, the skin. To reduce that, just increase the Color Noise Reduction, Holy cow! Look how good that works, look at our before and then after. Again, I'm going to zoom-in even further, so you can see what I'm talking about. All right, look at our before here and then after, see all that little red color and red and green and all those color artifacts, those are now gone, great. We can also remove the Luminance Noise. Now what luminance noise is just based on the overall tone? So go up to the skin here and again we can see how it will start to pull these back. Now this works really good when you have areas where you have sharp shadows. I'll zoom-out a little bit so we can see what's happening.

This image doesn't have a lot of luminance noise, so when we look at our before and after, it's a just a little bit and it just reducing that suddenly. Probably, even going to be hard for you to see on your screen. Yet keep in mind, color noise has to do with colors and luminance, just has to do where you have tonal variation and it will then smooth those things out. Okay, well let's get in the sharpening then. Press the Spacebar and reposition the image, so I can see the face because that's really the most important part, right. Well, if I go ahead and increase the Amount, I can see that the sharpening is going to increase. So I'm going to make this real drastic, so I have a real high amount. How then do I understand the different controls down here? Well, let's take a look at a trick which will help you do that. Hold down the Option key on a Mac/Alt key on a PC. For this particular slider, it will show you the imaging gray skill, so it's going to start to show us where the contrast is coming in and increase sharpening. Okay, well kind of hard to see.

Well, what's radius all about? When I increase my Radius, what you can see that's increasing or deepening the reach of the effect of the sharpening. Now, it's pretty subtle because my Detail slider is still low. Well, what's detail then? We will look at detail. When I hold down the Option key on a Mac, Alt key on a PC and I increase the detail, Holy cow! Basically it saying I want to sharpen all those details. Now when I let go off my button here, does the image look good? No, not at all because all the small, small details have been sharpened. Well, let's go back to this Radius slider, hold down the Option key now and when I click and drag this, you can see that the wrinkles are going to become darker or they are going to become a little bit smoother. So radius has to do with how far the sharpening extends from a little area, say a wrinkle, how far out we are going to increase the contrast on both edges. Detail, this works really well, high detail for landscape, for people I want real low detail.

Now what about Masking? Well, masking is kind of interesting. Let's bring the detail back up for a moment so we can see how that works. Masking, hold down the Option key on the Mac/Alt key on the PC, and then click and drag. You know about Masking in Photoshop, right. Black conceals and white reveals. So what's happening here? Well, if I increase my Masking amounts, going to say we will just sharpened those edges that are white. So now in this case, I'm able to do some edge sharpening. So remember before, how we had all the detail sharpening in here. So let's go back to our detail sharpening, see how it's all on there. Yet that masking, if we look at our before and after, is limiting that to the edges. So we are now going to see it really strong in the edges of the nose, then wrinkles and the eyebrow. All right, well so far so good. We have deconstructed how these controls work, how then you sharpen an image.

Let's go ahead and reduce all these amounts. First thing I would like to do is work on the noise. So I'm going to reduce the noise because I know I need to get rid of that and then I'm going to increase my Amount and Radius, I'm just going to look at to bring somewhere pretty low than the Detail, I'm going to slide one way and then the other to get a feel for the image and then get, in this case I have skin, so I know it's going to be really low. And my Radius, I'm just looking how far I'm going to extend that sharpening. Masking will then pull it back to some of the more important edges. So that looks pretty good to me. Let's look at our overall before and after. Here is before and after, it's pretty subtle, yet significant, before and after. I'll zoom-in even further on to the eye, so you can see where I'm going.

Here is my before and then my after. So little bit of a noise reduction and a little bit of sharpening around the edges. Now it's essential that I don't over sharpen, because when you over sharpen, your image just looks like it's deep fried, it doesn't look natural. So when I have natural sharpening, I'll go ahead and double click the Zoom tool. That will take the image to 100%. Now it's really important to evaluate this at 100%, again before and after, I think that looks pretty nice, maybe a little bit less on my Amount. Also, it's important to step back, so I'll double click the Zoom tool and just get a feel for the overall image. Now I know the face is really important but when I step back, I realize, well this part of the garment is pretty sharp, that's important as well. So let's zoom-in on that. So I'll go ahead and zoom-in on that and then double click the Zoom tool to take it to 100% and look at my before and after.

Again, nice noise reduction, the edges still look pretty good. I think this image is good to go. Finally, double click the Hand tool, step back and take a look at the image and keep in mind that what we are doing here is Input Sharpening. This is the initial sharpening. Now, we want to keep this pretty subtle because later as we will talk about another chapter, we will perform some Output Sharpening, which will be contingent upon the type of output that we are doing. Let's say if we are going to print on a matte paper or a glossy paper and also what size we are going to print the image. So again, all I'm interested in doing here. It's a little bit of noise reduction and then some subtle input sharpening in order to get the image at a pretty good place. But be really careful that you don't over sharpen here because if you over sharpen here, when you later go to Photoshop, you are going to have some serious problems.

All right, well that wraps up this movie. See you in the next one.

Show transcript

This video is part of

Image for Photoshop CS4 for Photographers
Photoshop CS4 for Photographers

228 video lessons · 36506 viewers

Chris Orwig
Author

 
Expand all | Collapse all
  1. 3m 28s
    1. Introduction
      2m 43s
    2. Using the exercise files
      45s
  2. 19m 32s
    1. Taking visual snapshots
      2m 33s
    2. What's new in the Photoshop CS4 menus
      1m 24s
    3. The importance of the 30-minute blink
      2m 38s
    4. Isolation
      3m 32s
    5. Taking notes
      2m 29s
    6. Creative memorization
      2m 16s
    7. Verbalize, human, fun
      1m 18s
    8. Lessons from a legend: Douglas Kirkland
      2m 10s
    9. Resources and links
      1m 12s
  3. 30m 42s
    1. Is Photoshop CS4 worth it?
      2m 50s
    2. Seeing the new Tools panel
      3m 22s
    3. Working with the Application bar
      2m 51s
    4. Navigating with the Hand and Zoom tools
      4m 27s
    5. Rotating with the new Rotate View tool
      2m 0s
    6. New ways of arranging documents
      5m 41s
    7. Working with the panels
      2m 34s
    8. Customizing your workspace
      2m 11s
    9. Creating custom keyboard shortcuts
      3m 12s
    10. Creating custom menus
      1m 34s
  4. 39m 36s
    1. Choosing your Color settings
      5m 4s
    2. Setting Image Interpolation preferences
      3m 1s
    3. Zoom preferences
      2m 40s
    4. Interface preferences
      7m 46s
    5. File-handling preferences
      2m 33s
    6. Performance preferences: Memory
      5m 40s
    7. Performance preferences: Cursor
      5m 46s
    8. Performance preferences: Transparency and Gamut
      4m 44s
    9. Reviewing the other preferences
      2m 22s
  5. 21m 14s
    1. Bit Depth 101
      4m 34s
    2. Introducing image size
      2m 47s
    3. Image Resize overview
      7m 54s
    4. Resizing by cropping
      3m 33s
    5. Straightening
      2m 26s
  6. 10m 10s
    1. Introducing color management
      2m 3s
    2. Monitor calibration basics
      2m 43s
    3. Advanced monitor calibration
      2m 36s
    4. Creating a neutral work environment
      2m 48s
  7. 11m 17s
    1. Using Photoshop, Bridge, and Lightroom together
      2m 20s
    2. Bridge as a digital light box
      1m 19s
    3. General Bridge preferences
      2m 49s
    4. Thumbnail Bridge preferences
      1m 38s
    5. Advanced and Cache Bridge preferences
      3m 11s
  8. 28m 1s
    1. Creative tip 1: Discarding, the great selection technique
      4m 6s
    2. Introducing the Bridge interface
      3m 27s
    3. Getting photos from your camera
      4m 14s
    4. Choosing a workspace
      4m 16s
    5. Customizing the workspace and the Synchronized window
      4m 10s
    6. Using Bridge to rate and sort
      4m 3s
    7. Sorting with filters
      3m 45s
  9. 33m 53s
    1. Previewing multiple files
      5m 6s
    2. The Bridge Review mode
      7m 4s
    3. The Bridge Full Screen mode
      3m 8s
    4. Bridge slideshows
      4m 25s
    5. Stacking images
      3m 24s
    6. Renaming and batch-renaming
      4m 11s
    7. Adding favorites
      1m 58s
    8. Grouping images with Collections
      4m 37s
  10. 15m 3s
    1. Setting up metadata
      3m 34s
    2. Customizing the workspace for metadata
      2m 20s
    3. Creating a metadata template to add a copyright notice
      3m 55s
    4. Keywording images
      3m 33s
    5. Filtering images based on metadata
      1m 41s
  11. 9m 54s
    1. Recording an action
      2m 16s
    2. Batch-processing an action
      2m 11s
    3. Simplifying repetitive steps using the Image Processor
      2m 21s
    4. Opening multiple images as layers
      3m 6s
  12. 1h 13m
    1. What is Camera Raw?
      2m 47s
    2. Understanding the Camera Raw preferences
      3m 15s
    3. Opening files in Camera Raw
      5m 23s
    4. The Camera Raw interface and essential controls
      5m 13s
    5. White Balance, Straighten, and Tone
      3m 2s
    6. Crop, Rotate, and Vignette
      5m 6s
    7. Improving color and tone
      4m 45s
    8. Saturation vs. Vibrance
      4m 46s
    9. Converting an image to black and white
      4m 7s
    10. Split-toning an image
      3m 32s
    11. Working with tone subjectively
      5m 56s
    12. Adjustment Brush essentials
      3m 19s
    13. Using the Adjustment Brush
      7m 24s
    14. Working with the Graduated filter
      4m 6s
    15. Sharpening and noise reduction
      6m 10s
    16. Working with multiple images
      4m 45s
  13. 38m 42s
    1. Creative tip 2: Worth the risk
      2m 30s
    2. Introducing layers
      2m 53s
    3. Working with layers
      2m 21s
    4. Working with History and the History Brush
      4m 1s
    5. Aligning layers
      1m 56s
    6. Organizing layers
      4m 17s
    7. Layer style effects
      4m 21s
    8. Creating a clipping mask
      4m 27s
    9. Creating a reflection of an image
      2m 37s
    10. Targeting and moving layers
      5m 36s
    11. Reviewing layers shortcuts
      3m 43s
  14. 31m 31s
    1. Introducing masking
      2m 8s
    2. Creating a simple layer mask
      3m 51s
    3. Masking shortcuts
      3m 25s
    4. Using Color Range to create a detailed mask
      3m 48s
    5. Creating a layer mask with Color Range
      5m 5s
    6. Masking and brightening eyes
      3m 35s
    7. Masking and selective sharpening
      2m 58s
    8. The Quick Mask mode
      6m 41s
  15. 24m 15s
    1. Creating a custom border with masking
      5m 41s
    2. Using pre-built borders
      7m 6s
    3. Exploring sample image frames
      4m 59s
    4. Frame plugin highlight: Photoframe
      6m 29s
  16. 51m 47s
    1. Creating a mask with the Quick Selection tool
      5m 39s
    2. Working with the Quick Selection tool
      4m 12s
    3. Creating color range selections
      4m 46s
    4. Advanced selection enhancements
      5m 1s
    5. Using the Magic Wand
      2m 33s
    6. Using the Lasso tool
      5m 37s
    7. Pen and path shortcuts
      5m 20s
    8. Understanding paths
      4m 7s
    9. Creating path selections
      6m 3s
    10. The Magnetic Lasso tool and paths
      8m 29s
  17. 21m 10s
    1. Introducing the Adjustments panel
      2m 26s
    2. Brightness and contrast
      3m 39s
    3. Understanding the difference between Vibrance and Saturation
      2m 55s
    4. Using the Target Adjustment tool
      4m 9s
    5. Hue/Saturation adjustments and masking
      3m 15s
    6. Hue/Saturation blending with Shadow/Highlight
      4m 46s
  18. 17m 45s
    1. Introducing levels
      1m 58s
    2. Enhancing color and tone with levels
      3m 3s
    3. Modifying color with levels
      3m 47s
    4. Levels and masking
      3m 13s
    5. Using levels and masking to get the most out of adjustments
      5m 44s
  19. 40m 58s
    1. Demystifying curves
      6m 52s
    2. Using curves for contrast and tone
      3m 33s
    3. Midtones and advanced blending
      2m 50s
    4. Curves and general Hue/Saturation
      2m 54s
    5. Enhancing color with curves
      6m 18s
    6. Curves, color, masking, and tone
      5m 10s
    7. Curves and masking
      4m 54s
    8. Creative tip 3: Using curves for publication
      5m 14s
    9. Using, modifying, and saving curves presets
      3m 13s
  20. 24m 7s
    1. Creative tip 4: Ordinary ingredients = extraordinary results
      2m 23s
    2. Introducing blend modes
      5m 36s
    3. Blend modes visualized
      6m 48s
    4. Blending multiple images
      6m 9s
    5. Blend modes shortcuts
      3m 11s
  21. 42m 57s
    1. Correcting color with eyedroppers
      4m 37s
    2. Advanced color correction with eyedroppers
      2m 27s
    3. Color correction with Camera Raw
      3m 3s
    4. Performing difficult color correction with Camera Raw
      3m 1s
    5. Performing easier color correction with a color chart
      2m 31s
    6. Color-correcting skin by the numbers
      3m 42s
    7. Color-correcting by the numbers
      4m 10s
    8. Color correction: Studio shot
      3m 6s
    9. Color correction: Light skin tone
      3m 6s
    10. Color correction: Dark skin tone
      3m 44s
    11. Color correction: Multiple skin tones
      6m 40s
    12. Color correction plugin highlight: SkinTune 2
      2m 50s
  22. 44m 44s
    1. Replacing color with Hue/Saturation
      3m 2s
    2. Replacing a color
      5m 6s
    3. Modifying color with Selective Color
      3m 5s
    4. Color focus
      5m 59s
    5. Experimenting with cool and warm colors
      5m 18s
    6. Enhancing a portrait with sunset colors
      5m 16s
    7. Enhancing a landscape with sunrise colors
      5m 19s
    8. Enhancing a color group shot
      3m 17s
    9. Using photo filters with black-and-white photos
      3m 14s
    10. Using photo filters with color photos
      5m 8s
  23. 22m 3s
    1. Introducing the Burn and Dodge tools
      2m 56s
    2. Using the Burn and Dodge tools
      3m 47s
    3. Darkening corners with the Soft Light blend mode
      3m 0s
    4. Adding contrast to the highlights
      2m 30s
    5. Darkening a portion of an image
      2m 45s
    6. Correcting bright and dark tones
      3m 56s
    7. Reducing highlights with the Multiply blend mode
      3m 9s
  24. 19m 30s
    1. Creative tip 5: Seeing beyond the color - your gear is good enough
      4m 58s
    2. Introducing black-and-white conversion
      3m 37s
    3. Portrait black-and-white conversion
      3m 31s
    4. Landscape black-and-white conversion
      2m 40s
    5. Adding grain and tone to a black-and-white image
      4m 44s
  25. 11m 16s
    1. Introducing Smart Filters
      2m 36s
    2. Applying Smart Filters
      3m 21s
    3. Blending and masking Smart Filters
      5m 19s
  26. 19m 38s
    1. Noise reduction with Surface Blur
      4m 36s
    2. The Noise Reduction filter
      2m 54s
    3. Advanced noise reduction with Channels
      5m 32s
    4. Advanced noise reduction with the Dfine plugin
      6m 36s
  27. 33m 29s
    1. The Dust and Scratches Filter
      3m 57s
    2. Using masking to remove dust and scratches
      5m 10s
    3. Introducing the trio of healing tools
      6m 18s
    4. Using the Healing and Clone Stamp tools
      4m 21s
    5. Using the Patch tool
      7m 40s
    6. Cleaning up an image with what's there
      6m 3s
  28. 58m 58s
    1. Creative tip 6: A beautiful mistake
      2m 51s
    2. Cleaning up a background
      3m 21s
    3. Removing blemishes
      4m 19s
    4. Cleaning up backgrounds and blemishes
      3m 46s
    5. Brightening eyes
      3m 12s
    6. Changing eye color
      4m 55s
    7. Darkening the edge of an eye
      1m 32s
    8. Adding makeup
      2m 25s
    9. Correcting distortion
      2m 19s
    10. Reducing eye wrinkles
      4m 4s
    11. Adding height and reducing wrinkles
      7m 55s
    12. Whitening teeth
      4m 6s
    13. Whitening teeth using Quick Mask
      3m 39s
    14. Softening skin
      5m 5s
    15. Removing red-eye
      2m 21s
    16. The next steps in retouching
      3m 8s
  29. 38m 35s
    1. Introducing Smart Sharpen
      3m 23s
    2. Smart Sharpen demystified
      4m 10s
    3. Smart Sharpen and masking
      8m 46s
    4. Using the Unsharpen Mask filter
      5m 19s
    5. Black-and-white High Pass sharpening
      8m 2s
    6. Color High Pass sharpening
      3m 27s
    7. Sharpening and tone
      5m 28s
  30. 28m 38s
    1. Resizing for email and the web
      3m 1s
    2. Image size considerations
      2m 54s
    3. Preparing files for the web
      4m 37s
    4. Sharpening for the web
      2m 12s
    5. Correcting color for the web
      3m 10s
    6. The Save for Web dialog
      3m 51s
    7. Creating a web gallery
      6m 21s
    8. Sharing your photos online
      2m 32s
  31. 23m 33s
    1. Creating contact sheets
      4m 19s
    2. Presenting your photos as a PDF slideshow
      2m 55s
    3. Desktop printing recommendations
      1m 40s
    4. Preparing to print
      5m 53s
    5. Using Soft Proof to pre-visualize printing
      3m 46s
    6. Using the Print dialog
      3m 31s
    7. Print settings
      1m 29s
  32. 23s
    1. Goodbye
      23s

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