Apply an NL Filter to Images in GIMP

Edited by Freya, VisiHow, Eng, Anonymous

You're watching VisiHow. In this tutorial, we're going to show you how to apply "NL filter" to an image in GIMP in Windows 7. "NL Filter" is a nonlinear filter, which means it combines the "Smoothing", "Despeckle", and "Sharpening" elements.

Was this helpful? Yes | No | I need help

Apply an NL Filter to an image on GIMP.mp4-canvas118 273999.jpg

Ad

Steps

  1. 1
    You should have the program open and an image ready to use.
    Check our tutorials on how to open GIMP and how to open existing documents in GIMP.
    Apply an NL Filter to an image on GIMP.mp4-canvas16 774.jpg
    Advertisement
    Was this step helpful? Yes | No | I need help

  2. 2
    First, click "Filters" on the top-left of the window.
    Apply an NL Filter to an image on GIMP.mp4-canvas29 475.jpg
    Advertisement
    Was this step helpful? Yes | No | I need help

  3. 3
    Move the cursor to "Enhance".
    Apply an NL Filter to an image on GIMP.mp4-canvas32 253999.jpg
    Was this step helpful? Yes | No | I need help

  4. 4
    Then, click on "NL Filter...".
    A dialogue box will appear with a preview of your image.
    Apply an NL Filter to an image on GIMP.mp4-canvas33 670999.jpg
    Was this step helpful? Yes | No | I need help

  5. 5
    You can click and drag your preview around or use the arrows and scrollers to select an area.
    Apply an NL Filter to an image on GIMP.mp4-canvas40 059309.jpg
    Was this step helpful? Yes | No | I need help

  6. 6
    If the preview does not appear, ensure that you have the "Preview" box checked.
    Apply an NL Filter to an image on GIMP.mp4-canvas48 830276.jpg
    Was this step helpful? Yes | No | I need help

  7. 7
    Now, click one of the options in "Filter".
    You can click "Alpha trimmed mean", "Optimal estimation", and "Edge enhancements". For this tutorial, let's click "Alpha Trimmed Mean". This option will not work if you have the alpha channel in your image. This affects the whole layer, not a selection.
    Apply an NL Filter to an image on GIMP.mp4-canvas65 240999.jpg
    Was this step helpful? Yes | No | I need help

  8. 8
    Next, you can adjust the "Alpha" and "Radius" values.
    You can do that by clicking or clicking and dragging the scrollers or by typing the values to the right.
    Apply an NL Filter to an image on GIMP.mp4-canvas79 915999.jpg
    Was this step helpful? Yes | No | I need help

  9. 9
    When you are satisfied, click "OK" to apply your changes to the layer.
    Apply an NL Filter to an image on GIMP.mp4-canvas110 693999.jpg
    Was this step helpful? Yes | No | I need help

    Advertisement

This is a VisiHow tutorial, and we've just shown you how to apply "NL Filter" in GIMP in Windows 7. If you have any questions or comments regarding this tutorial or the program used, just add them to the section below. Thank you for choosing VisiHow!

Was this helpful? Yes | No | I need help

Video: Apply an NL Filter to Images in GIMP

Comments

VisiHow welcomes all comments. If you do not want to be anonymous, register or log in. It is free.




Freya
Featured Author
1,135 Articles Started
1,135 Article Edits
57,750 Points
Freya is a featured author with VisiHow. Freya has achieved the level of "Major" with 57,750 points. Freya has started 1,135 articles (including this one) and has also made 1,135 article edits. 459,000 people have read Freya's article contributions.
Freya's Message Board
Freya: Hi, my name is Freya.
Freya: Can I help you with your problem about "Apply an NL Filter to Images in GIMP"?
 

Article Info

Categories : Software

Recent edits by: Eng, VisiHow, Freya

Share this Article:

Thanks to all authors for creating a page that has been read 219 times.

Do you have a question not answered in this article?
Click here to ask one of the writers of this article
x

Thank Our Volunteer Authors.

Would you like to give back to the community by fixing a spelling mistake? Yes | No