**Block Category:** Operations

Input Image
Format

**Input Image Requirements:** Binary image

**Description:** Input to the Distance Transform block
is a binary image with edges that are zero value and non-edges that are non-zero
value. The Distance Transform block sets every output pixel to a value
proportional to the distance to the nearest zero pixel in the input image. That
is, the longer the distance to the nearest zero 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.

#### Example

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