ximgproc_StructuredEdgeDetection

Extended image processingclassOpenCV 5.0.0

import { ximgproc_StructuredEdgeDetection } from '@banou/opencv-wasm'

Use after await initOpenCV(). See the initialization and named imports guide.

ARGUMENTSConstructor or factory

CLASSximgproc_StructuredEdgeDetection

RETURN TYPEOwned native handle

Call structure. A void return can still write to destination arguments. The parameter descriptions define inputs, outputs and ownership.

Native object: release it with using or delete(). Factories can return null; check before calling methods. Inherits Algorithm.

Class implementing edge detection algorithm from [Dollar2013] :

Upstream declaration ↗

Constructors and members

clone

Create another handle to the same native object. This retains the object without copying its pixels or algorithm state; dispose both handles separately.

clone(): this;

Returns

The this result.

detectEdges

The function detects edges in src and draw them to dst.

The algorithm underlies this function is much more robust to texture presence, than common
approaches, e.g. Sobel

See: Sobel, Canny

detectEdges(src: Mat, dst: Mat): void;

src: source image (RGB, float, in [0;1]) to detect edges
dst: Output destination, filled by the native operation. destination image (grayscale, float, in [0;1]) where edges are drawn

Upstream declaration ↗

computeOrientation

The function computes orientation from edge image.

computeOrientation(src: Mat, dst: Mat): void;

src: edge image.
dst: Output destination, filled by the native operation. orientation image.

Upstream declaration ↗

edgesNms

The function edgenms in edge image and suppress edges where edge is stronger in orthogonal direction.

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat, r: number, s: number, m: number, isParallel: boolean): void;

5 available overloads

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat): void;

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat, r: number): void;

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat, r: number, s: number): void;

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat, r: number, s: number, m: number): void;

edgesNms(edge_image: Mat, orientation_image: Mat, dst: Mat, r: number, s: number, m: number, isParallel: boolean): void;

edge_image: edge image from detectEdges function.
orientation_image: orientation image from computeOrientation function.
dst: Output destination, filled by the native operation. suppressed image (grayscale, float, in [0;1])
r: radius for NMS suppression.
s: radius for boundary suppression.
m: multiplier for conservative suppression.
isParallel: enables/disables parallel computing.

Upstream declaration ↗

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