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.