Module gradients

Functions for computing gradients of image intensities.

Statics

HORIZONTAL_PREWITT

Prewitt filter for detecting horizontal gradients.

HORIZONTAL_SCHARR

Scharr filter for detecting horizontal gradients.

HORIZONTAL_SOBEL

Sobel filter for detecting horizontal gradients.

VERTICAL_PREWITT

Prewitt filter for detecting vertical gradients.

VERTICAL_SCHARR

Scharr filter for detecting vertical gradients.

VERTICAL_SOBEL

Sobel filter for detecting vertical gradients.

Functions

horizontal_prewitt

Convolves an image with the HORIZONTAL_PREWITT kernel to detect horizontal gradients.

horizontal_scharr

Convolves an image with the HORIZONTAL_SCHARR kernel to detect horizontal gradients.

horizontal_sobel

Convolves an image with the HORIZONTAL_SOBEL kernel to detect horizontal gradients.

prewitt_gradients

Returns the magnitudes of gradients in an image using Prewitt filters.

sobel_gradient_map

Computes per-channel gradients using Sobel filters and calls f to compute each output pixel.

sobel_gradients

Returns the magnitudes of gradients in an image using Sobel filters.

vertical_prewitt

Convolves an image with the VERTICAL_PREWITT kernel to detect vertical gradients.

vertical_scharr

Convolves an image with the VERTICAL_SCHARR kernel to detect vertical gradients.

vertical_sobel

Convolves an image with the VERTICAL_SOBEL kernel to detect vertical gradients.