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Removing dust and scratches

From: Scanning with SilverFast

Video: Removing dust and scratches

In this movie, I'd like to show you how to use the SRD filter to remove dust and scratches from a reflective image. Earlier we accomplished a film scan using the iSRD tool which is the infrared dust and scratches filter. When we're doing reflective art, we use the standard SRD dust and scratches filter. So we activate that by clicking on the SRD icon and this dialog box comes up. And first thing we're going to want to do is turn that Preview on, just like any of these other filters like the Unsharp Mask or the GANE filter.

Removing dust and scratches

In this movie, I'd like to show you how to use the SRD filter to remove dust and scratches from a reflective image. Earlier we accomplished a film scan using the iSRD tool which is the infrared dust and scratches filter. When we're doing reflective art, we use the standard SRD dust and scratches filter. So we activate that by clicking on the SRD icon and this dialog box comes up. And first thing we're going to want to do is turn that Preview on, just like any of these other filters like the Unsharp Mask or the GANE filter.

We want to actually see what it's going to be doing to our images and the only way to do that is to get that high-resolution scan. So the scanner, we'll go through a high-resolution scan. It takes just a minute or two and then it'll bring it up and look like this, and then you can use your navigator to move around just like we did when we applied the GANE filter. In this case, we're going to move into this area here where it's a little bit darker where we can see some of the nasty dust and scratches that we have in the original image, and there is plenty here for us to worry about. You know, when you apply sharpening to an image like this, boy, it just makes all those worse because they're high contrast edges, and the sharpening tool doesn't know a defect from a highlight shadow edge.

So you definitely want to apply this before you apply any sharpening to your image. We have several choices here and how we want to do this and how we want to want to view it, let's just take a look at some of these views here. First is the Original and then you can choose Mark and then you can see what it's going to actually be working on removing. Notice it marks most of them here; there's a few small ones like this that are very faint that it doesn't detect but we can get rid of those anyway, and then we can go Correct, so you can see what the corrected version is going to look like. Now the Defect type, typically you want to remove both black and white.

On a very light image that has dark defects then you could just go black. On a dark image that just has white defects, so that the dust and scratch doesn't hurt any of the detail in the shadow areas, you might just go with processing white defects. But on image like this, we'll just do both and that's typically the way I'll do it. Now there are three sliders here for adjusting the Dust and Scratch Removal. I typically leave this on 100% and then I'll adjust the Defect size and the Detection and I kind of work in reverse order most of the time.

For instance, let's move this back down to about 2 or 3 and you'll see some of the defects come back in. And then as we move this up to around 4, you'll see most of the defects are taken out. We can keep going up in size, although typically, when I get to 4 or 5 and I've got rid of the most of the large defects then I might push the Detection up to maybe about 80 or so, and boom, you'll see all the real fine ones are completely removed. So I typically leave my Intensity at 100 and then Defect size and I try to get it up around 4 or 5 and then go with Detection.

There is an Expert dialog box which, similar to the Selective Color Cast tool, provides a masking capability so that you can create masks in which you can apply different dust and scratch removal characteristics to various parts of your image. And you can create the mask and then edit the mask with these tools. Honestly, I've never had to use this tool in SilverFast, but I don't work with images have an enormous number of dust and scratches. So if you work in that kind of environment with those kind of images, you might find the masking tool interesting and useful.

So there is dust and scratch removal.

Show transcript

This video is part of

Image for Scanning with SilverFast
Scanning with SilverFast

52 video lessons · 4232 viewers

Taz Tally
Author

 
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  1. 5m 19s
    1. Welcome
      58s
    2. What you should know before watching this course
      43s
    3. Taking the Tazmanian Oath
      3m 38s
  2. 19m 14s
    1. Launching SilverFast
      4m 2s
    2. Touring the SilverFast interface
      3m 35s
    3. Understanding SilverFast's scanning workflows
      4m 28s
    4. Using automated vs. manual scanning
      4m 31s
    5. Getting help as you use SilverFast
      2m 38s
  3. 32m 46s
    1. Touring the SilverFast 8 automatic scanning tools
      6m 7s
    2. Preparing for automatic scanning
      4m 6s
    3. Arranging your workspace
      4m 23s
    4. Setting up color management
      4m 43s
    5. Setting scan frame and resolution
      3m 55s
    6. Adjusting, naming, formatting, and locating an image
      8m 24s
    7. Previewing scan settings with the info tool
      1m 8s
  4. 1h 7m
    1. Scanning simple line art
      8m 6s
    2. Scanning detailed line art
      8m 9s
    3. Scanning grayscale photos
      11m 43s
    4. Scanning color photos
      11m 17s
    5. Scanning a color photo as a grayscale image
      12m 15s
    6. Scanning a positive piece of film
      6m 52s
    7. Scanning a negative piece of film
      8m 39s
  5. 26m 1s
    1. Touring the manual scanning tools
      7m 19s
    2. Setting preferences for manual scanning
      10m 0s
    3. Calibrating your scanner
      3m 40s
    4. Arranging your workspace
      5m 2s
  6. 1h 35m
    1. Scanning simple line art and changing it into vectors
      7m 38s
    2. Scanning simple line art and keeping it as pixels
      5m 41s
    3. Scanning detailed line art
      8m 18s
    4. Scanning grayscale photos
      14m 5s
    5. Scanning landscape color photos
      15m 51s
    6. Scanning color portrait photos
      13m 56s
    7. Scanning color product shots
      9m 29s
    8. Scanning a color photo as a grayscale image
      4m 31s
    9. Scanning a piece of positive color film
      5m 52s
    10. Scanning a piece of negative color film
      9m 56s
  7. 1h 0m
    1. Should I use SilverFast or Photoshop?
      4m 9s
    2. Making global color corrections
      4m 37s
    3. Bringing out shadow details
      4m 28s
    4. Making a selective color replacement
      3m 21s
    5. Sharpening in SilverFast
      7m 15s
    6. Working with target-based corrections
      4m 55s
    7. Color correcting with neutrals
      10m 19s
    8. Exploring automatic color correction in manual mode
      3m 35s
    9. Scanning a printed image
      5m 49s
    10. High-bit-depth and HDR scanning
      5m 28s
    11. Removing noise and patterns
      3m 32s
    12. Removing dust and scratches
      3m 30s
  8. 7m 2s
    1. Batch scanning images
      1m 28s
    2. Using the JobManager
      4m 16s
    3. Exploring SilverFast 8 shortcuts and tips
      1m 18s
  9. 1m 29s
    1. Goodbye
      1m 29s

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