Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Removing noise and patterns

From: Scanning with SilverFast

Video: Removing noise and patterns

In this video, I'd like to show you how, using a filter called GANE filter, we can take an image like this, which is soft because it's got some noise in the background, and use the GANE filter that help take away some of that noise and sharpen our image at the same time. The problem with images like these that have been shot under low light and then compressed with JPEG compression is they tend to have the noise from the high ISO and then some JPEG artifacts on top of that. So we open up this image and magnify it, and then we're going to hit the GANE filter. This is the filter that's called the Grain and Noise Elimination filter whereas, in fact, it's a Noise Elimination filter and a sharpening tool at the same time.

Removing noise and patterns

In this video, I'd like to show you how, using a filter called GANE filter, we can take an image like this, which is soft because it's got some noise in the background, and use the GANE filter that help take away some of that noise and sharpen our image at the same time. The problem with images like these that have been shot under low light and then compressed with JPEG compression is they tend to have the noise from the high ISO and then some JPEG artifacts on top of that. So we open up this image and magnify it, and then we're going to hit the GANE filter. This is the filter that's called the Grain and Noise Elimination filter whereas, in fact, it's a Noise Elimination filter and a sharpening tool at the same time.

Now we can just assign a preset here, like Light, Medium, or Strong. But to really see what the impact of this is going to be, I suggest you go ahead and turn on the Preview. You accomplish that by clicking on the 1:1. It does a high-resolution overview scan and that allows us to take a look at our image in detail and depth. Notice you can tell by looking at it, there is a lot of detail that's missing from this image and it's because of the noisy background, and if we try to sharpen it without applying GANE filter first, a lot of that noise is exacerbating and you end up with kind of horrible patterns on people's faces which is not good.

So how do we apply the filter? Well, we can go Light, Medium, or Strong and just take what it kind of gives us. Or, what I am going to recommend is, go ahead and go to the Expert tool which we get to by clicking on the graduation cap. Then I begin with applying the presets; Light, Medium, see a little bit of impact there. And then we go to Strong, and notice what we're getting here is some grain that's actually been added back in the image from the sharpening. I'd like to go a little bit too far and then kind of back it off from there.

First, let's set the Dark limits. Typically, I'm going to but this at about 90-95, somewhere in there, kind of like with the Unsharp Mask where I don't like to sharpen between 95 and 100, or 90 and 100 depending on the image. So I might put the Dark limit at 90, so that none of the sharpening will be applied past 90% black, and then we can adjust Power and Threshold. We can put the Power 100 and then we can start backing off the threshold. Watch the graininess in the image will start to disappear. So if we go to 9, 8, 6, we get down to about 5 and then we've lost most of the graininess and when we check the check box to turn off and notice that the image is getting softer when we turn it off. It's getting sharper when we turn it on. We're not getting that noise pattern in there, because the Grain and Noise Elimination filter is first smoothing it and then applying some sharpening to it.

Sometimes if I go way down in the Threshold and it's still looking pretty grainy then I can back off in the Power a little bit and then adjust the Threshold. So you can use a combination of Power and Threshold. As you get some experience with the tool, you'll get some idea of what are the best setups. This is a common way that I'll use a filter and it's pretty darn effective. By the way, you can apply multiples of these related tools together. So for instance, I might make this a little bit smoother or get it to here and then apply the Unsharp Mask tool or I might do the GANE and noise and then use the SRD tool on top of that.

So you can apply multiple tools here. I typically end up with softening and removing the dust and scratches and then I'll go Unsharp Mask as the last filter. If I'm going to use my Unsharp Mask here, I could, as we've talked about, decide to use Unsharp Mask in Photoshop later on. So there's the Grain and Noise Elimination filter with a little bit of sharpening added in, even though it's not in the title.

Show transcript

This video is part of

Image for Scanning with SilverFast
Scanning with SilverFast

52 video lessons · 4154 viewers

Taz Tally
Author

 
Expand all | Collapse all
  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

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Scanning with SilverFast.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.