Detect Edges in an Image in the GIMP Application

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Video: Detect Edges in an Image in the GIMP Application

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You're watching VisiHow. In this tutorial. we're going to show you how to detect edges in an image in GIMP in Windows 7.

1. 1
   You should have GIMP open and an image ready to use

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   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" 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
   Click "Edge..." in the expanded menu

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   A dialogue box will appear with a preview of the image.

   

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5. 5
   You can click and drag the preview image to navigate around it

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   You can also click the scrollers and arrows on the sides.

   

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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
   Click the "Algorithm" drop-down menu

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8. 8
   Click an option

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   Some options will be more abstract than others. Experiment with the options to find the setting that works best for your image.

   

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9. 9
   You can change the "Amount" value by clicking and dragging the scroller

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   You can also type a value into the text box or click the up and down arrows to the right of "Amount".

   

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10. 10
    Then you can click "Wrap", "Smear", or "Black"

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    The default setting is "Smear". These options are greatly affected by colors that are used within the image. Let's keep the default setting for the tutorial.

    

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11. 11
    If you are satisfied with your settings, click "OK" to apply the changes to your image

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    Otherwise, click "Cancel".

    

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This is a VisiHow tutorial. We've just shown you how to use "Edge Detection" for an image 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!

Edge Detect Difference of Gaussians isn't working properly for me. What is going wrong?

Hello,.I am using GIMP 2.8.10 and have a photograph that I am working on. I applied the Edge Detect Difference of Gaussians to my photo and it did not work. The edges showed up perfectly in the preview screen, yet when I clicked OK it just turned my photo completely white. What is going on? I am following a tutorial on how to get a watercolor look on a real photo and applied the edge detect to a desaturated photo per the instructions. The edge detect is not working on a desaturated photo. I have tried: All other types of edge detect are working properly, but they don't provide what I need for the photo. The Guassian version is what I need and it is not working properly. I think it was caused by: I don't know. I have followed the instructions, like I said. The other types of edge detect are working properly, but they don't provide what I need for the photo. The Guassian version is what I need and it is not working properly.

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