EdgeDetect

EdgeDetect[image] finds edges in image and returns the result as a binary image.

EdgeDetect[image, r] finds edges at the scale of the specified pixel range r.

EdgeDetect[image, r, t] uses a threshold t for selecting image edges.

Examples

Detect edges in an image:

EdgeDetect[ExampleData[{"TestImage", "Lena"}]]

Please visit the official Wolfram Language Reference for more details.