Distance Transform

Block Category: Operations

Input Image Format

Input Image Requirements: Binary image with edges that are 0 value and non-edges that are non-zero value

Description: The Distance Transform block sets every output pixel to a value proportional to the distance to the nearest 0 pixel in the input image. That is, the longer the distance to the nearest 0 pixel, the brighter the intensity of the pixel.

The Distance Transform block uses a 3 x 3 masking array.

Distance Type

DIST_C: Calculates the distance on a four-connected grid (horizontal and vertical).

DIST_L1: Calculates the distance on an eight-connected grid (horizontal, vertical, and diagonal).

DIST_L2: Calculates the exact Euclidean distances.


In this example, DIST_L1 is applied to the input image.