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The Sobel filter is a type of image derivative filter used to detect edges in an image. It calculates the gradient magnitude of the intensity values in the image, by convolving the image with two kernels: one for detecting edges in the horizontal direction and one for edges in the vertical direction. The Sobel filter outputs a map of gradient magnitudes, which highlight the edges and texture features in the image. The gradient magnitudes can be combined to produce a gradient direction map, which can be used for edge orientation analysis. In computer vision and image processing, the Sobel filter is widely used in tasks such as edge detection, feature extraction, and image segmentation. The Sobel gradient magnitude (square-root sum of squares) is an indication of edge strength.



Input image(s).

Type: Image, List, Required, Single



Output image(s).

Type: Image, List

See also