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Difference of Gaussians: Edge Detection Technique

Learn about the Difference of Gaussians (DoG), an edge detection technique using two Gaussian curves to find edges in an image. Discover how to apply DoG to images, find zero-crossings, and process the output.

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Difference of Gaussians: Edge Detection Technique

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  1. Difference of Gaussians Nick Govier Dave Newman

  2. Introduction • Edge detection technique • Uses two Gaussian curves • In this case, DoG (Blue) = Gaussian 1 (Red) – Gaussian 2 (Green)

  3. DoG in 3D

  4. Applying to an Image

  5. Further Processing • Once the DoG has been applied to the image, need to find the zero-crossings, which are the edges: • Threshold the output to form a binary image • Find edges of binary output

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