Edge detection

Detects edges in the incoming image

Documentation

Algorithms

canny

Canny edge detection.

sigma:

Standard deviation of gaussian kernel (default 1.0)

More info: http://scikit-image.org/docs/0.13.x/api/skimage.feature.html#skimage.feature.canny

laplace

Find edges using the Laplace operator.

kernel size:

Kernel size of the discrete Laplacian operator

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.laplace

prewitt

Find edges using the Prewitt transform as one of, or combination of horizontal and vertical prewitt convolutions

horizontal/vertical:

Select orientation for transform, if both then mean square of both will be used

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.prewitt_h

roberts

Find edges using Robert’s cross operator.

positive/negative diagonal:

Select orientation for transform

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.roberts_pos_diag

scharr

Find edges using the Scharr transform as one of, or combination of horizontal and vertical prewitt convolutions. The Scharr operator has a better rotation invariance than other edge filters such as the Sobel or the Prewitt operators

horizontal/vertical:

Select orientation for transform, if both then mean square of both will be used

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.scharr_h

sobel

Find edges using the Sobel transform as one of, or combination of horizontal and vertical prewitt convolutions.

horizontal/vertical:

Select orientation for transform, if both then mean square of both will be used

More info: http://scikit-image.org/docs/0.13.x/api/skimage.filters.html#skimage.filters.sobel_h

Definition

Input ports

source image

source image to filter

Output ports

result image

result after filtering

Configuration

Algorithm (algorithm)

(no description)

horizontal/vertical (horizontal/vertical)

(no description)

kernel size (kernel size)

(no description)

positive/negative diagonal (positive/negative diagonal)

(no description)

sigma (sigma)

(no description)

Implementation

class node_detection_filters.EdgeDetection