grabCut

Image processingfunctionOpenCV 5.0.0

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

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

Explore visually: GrabCut →

Alternate colour-model estimation and graph cuts to separate foreground from background.

VISUAL WALKTHROUGHSegmentation

REFERENCE INPUTObject inside a selection rectangle

The same scene stays here while the working view changes.

→

RESULTCut away probable background

The illustrative cut retains the selected object and removes surrounding pixels inside the rectangle. User labels can correct mistakes before another iteration.

Illustrative example. The stages explain the method; they are not a live OpenCV execution.

example: samples/cpp/grabcut.cpp An example using the GrabCut algorithm Runs the GrabCut algorithm.

The function implements the GrabCut image segmentation algorithm.

grabCut(img: Mat, mask: Mat, rect: Rect, bgdModel: Mat, fgdModel: Mat, iterCount: number, mode: number): void;

2 available overloads

grabCut(img: Mat, mask: Mat, rect: Rect, bgdModel: Mat, fgdModel: Mat, iterCount: number): void;

grabCut(img: Mat, mask: Mat, rect: Rect, bgdModel: Mat, fgdModel: Mat, iterCount: number, mode: number): void;

img

Input 8-bit 3-channel image.

mask

Input/output value, modified by the native operation. Input/output 8-bit single-channel mask. The mask is initialized by the function when mode is set to #GC_INIT_WITH_RECT. Its elements may have one of the #GrabCutClasses.

rect

ROI containing a segmented object. The pixels outside of the ROI are marked as "obvious background". The parameter is only used when mode==#GC_INIT_WITH_RECT .

bgdModel

Input/output value, modified by the native operation. Temporary array for the background model. Do not modify it while you are processing the same image.

fgdModel

Input/output value, modified by the native operation. Temporary arrays for the foreground model. Do not modify it while you are processing the same image.

iterCount

Number of iterations the algorithm should make before returning the result. Note that the result can be refined with further calls with mode==#GC_INIT_WITH_MASK or mode==GC_EVAL .

mode

Operation mode that could be one of the #GrabCutModes

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.