getStructuringElement

Image processingfunctionOpenCV 5.0.0

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

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

Explore visually: Opening, closing and morphology →

Compose erosions and dilations to remove small structures or measure their boundaries.

VISUAL WALKTHROUGHMorphology

REFERENCE INPUTBinary mask

Two objects and a single-pixel speck make growth, shrinkage and cleanup easy to compare.

→

RESULTChanged foreground

100 foreground pixels become 99. Opening first erodes the region, then dilates the survivors. The isolated speck disappears.

Computed teaching example on a 24 × 16 image. Small kernels and simplified settings keep each change visible; use the image laboratory for native OpenCV.

Returns a structuring element of the specified size and shape for morphological operations.

The function constructs and returns the structuring element that can be further passed to #erode, #dilate or #morphologyEx. But you can also construct an arbitrary binary mask yourself and use it as the structuring element.

getStructuringElement(shape: number, ksize: Size, anchor: Point): Mat;

2 available overloads

getStructuringElement(shape: number, ksize: Size): Mat;

getStructuringElement(shape: number, ksize: Size, anchor: Point): Mat;

shape

Element shape that could be one of #MorphShapes

ksize

Size of the structuring element.

anchor

Anchor position within the element. The default value (-1, -1) means that the anchor is at the center. Note that only the shape of a cross-shaped element depends on the anchor position. In other cases the anchor just regulates how much the result of the morphological operation is shifted.

Returns

The Mat result. Release returned native handles with using or delete(), including handles nested in results.

Upstream declaration ↗

These signatures describe this package. Upstream documentation can mention optional backends that are absent from this build. Check runtime compatibility before choosing a backend or file format.