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opencv-wasm

gapi_erode

gapifunctionOpenCV 5.0.0
import { gapi_erode } from '@banou/opencv-wasm'

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

ARGUMENTSsrc, kernel, anchor, iterations
FUNCTIONgapi_erode
RETURN TYPEGMat
Call structure. A void return can still write to destination arguments. The parameter descriptions define inputs, outputs and ownership.

Erodes an image by using a specific structuring element.

The function erodes the source image using the specified structuring element that determines the shape of a pixel neighborhood over which the minimum is taken:

\texttt{dst} (x,y) =  \min _{(x',y'):  \, \texttt{element} (x',y') \ne0 } \texttt{src} (x+x',y+y')

Erosion can be applied several (iterations) times. In case of multi-channel images, each channel is processed independently. Supported input matrix data types are CV_8UC1, CV_8UC3, CV_16UC1, CV_16SC1, and CV_32FC1. Output image must have the same type, size, and number of channels as the input image.

Note: - Rounding to nearest even is procedeed if hardware supports it, if not - to nearest.

  • Function textual ID is "org.opencv.imgproc.filters.erode"

See: dilate, morphologyEx

gapi_erode(src: GMat, kernel: Mat, anchor: Point, iterations: number, borderType: number, borderValue: Scalar): GMat;
5 available overloads
gapi_erode(src: GMat, kernel: Mat): GMat;
gapi_erode(src: GMat, kernel: Mat, anchor: Point): GMat;
gapi_erode(src: GMat, kernel: Mat, anchor: Point, iterations: number): GMat;
gapi_erode(src: GMat, kernel: Mat, anchor: Point, iterations: number, borderType: number): GMat;
gapi_erode(src: GMat, kernel: Mat, anchor: Point, iterations: number, borderType: number, borderValue: Scalar): GMat;
src

input image

kernel

structuring element used for erosion; if element=Mat(), a 3 x 3 rectangular structuring element is used. Kernel can be created using getStructuringElement.

anchor

position of the anchor within the element; default value (-1, -1) means that the anchor is at the element center.

iterations

number of times erosion is applied.

borderType

pixel extrapolation method, see cv::BorderTypes

borderValue

border value in case of a constant border

Returns

The GMat 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.