Use Difference of Gaussians Effect on Images in the GIMP Application

Edited by Freya, VisiHow, Eng

You're watching VisiHow. In this tutorial, we're going to show you how to apply a "Difference of Gaussians" filter to an image in GIMP in Windows 7.

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Steps

  1. 1
    You should have GIMP open and an image ready to use
    .
    For more information, refer to our tutorials on how to open GIMP and how to open existing documents in GIMP.
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  2. 2
    First, click "Filters"
    .
    It's in the horizontal menu at the top of the window.
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  3. 3
    Move the cursor to "Edge-Detect" in the menu
    .
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  4. 4
    In the expanded menu that appears, click "Difference of Gaussians..."
    .
    A dialogue box will appear with a preview of your image.
    Apply a difference of Gaussian effect on GIMP.mp4-canvas26 205994.jpg
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  5. 5
    You can click and drag the preview or click the scrollbars and arrows to navigate the preview
    .
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  6. 6
    If you cannot see the preview, ensure that the "Preview" box in the dialogue window is checked
    .
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  7. 7
    Before changing any values, you can change the measurement unit by clicking the unit drop-down menu
    .
    Then, click a measurement unit.
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  8. 8
    You can change the "Radius 1" and "Radius 2" values in "Smoothing Parameters"
    .
    You can do it by typing numbers into the text box or by clicking the up and down arrows.
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  9. 9
    You can click the chain to connect or disconnect the values
    .
    The icon is on the right side of the text boxes. It links "Radius 1" and "Radius 2" values. The chain is currently disconnected, so you can change both values separately. You will see the preview update when you click the other text box or when you press the "Tab" key on the keyboard.
    Apply a difference of Gaussian effect on GIMP.mp4-canvas65 35392.jpg
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  10. 10
    You can also check or uncheck the "Normalize" and "Invert" options
    .
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  11. 11
    If you are satisfied with your settings, click "OK" to apply the changes to the image
    .
    This effect will create an outline that is not as simple as a black-and-white outline.
    Apply a difference of Gaussian effect on GIMP.mp4-canvas87 625308.jpg
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This is a VisiHow tutorial, and we've just shown you how to apply a "Difference of Gaussians" effect 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!

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Video: Use Difference of Gaussians Effect on Images in the GIMP Application

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Categories : Software

Recent edits by: VisiHow, Freya

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