gapi_resize

gapifunctionOpenCV 5.0.0

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

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

ARGUMENTSsrc, dsize, fx, fy

FUNCTIONgapi_resize

RETURN TYPEGMat

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

gapi_colorconvert

Resizes an image.

The function resizes the image src down to or up to the specified size.

Output image size will have the size dsize (when dsize is non-zero) or the size computed from src.size(), fx, and fy; the depth of output is the same as of src.

If you want to resize src so that it fits the pre-created dst, you may call the function as follows:

    // explicitly specify dsize=dst.size(); fx and fy will be computed from that.
    resize(src, dst, dst.size(), 0, 0, interpolation);

If you want to decimate the image by factor of 2 in each direction, you can call the function this way:

    // specify fx and fy and let the function compute the destination image size.
    resize(src, dst, Size(), 0.5, 0.5, interpolation);

To shrink an image, it will generally look best with cv::INTER_AREA interpolation, whereas to enlarge an image, it will generally look best with cv::INTER_CUBIC (slow) or cv::INTER_LINEAR (faster but still looks OK).

Note: Function textual ID is "org.opencv.imgproc.transform.resize"

See: warpAffine, warpPerspective, remap, resizeP

gapi_resize(src: GMat, dsize: Size, fx: number, fy: number, interpolation: number): GMat;

4 available overloads

gapi_resize(src: GMat, dsize: Size): GMat;

gapi_resize(src: GMat, dsize: Size, fx: number): GMat;

gapi_resize(src: GMat, dsize: Size, fx: number, fy: number): GMat;

gapi_resize(src: GMat, dsize: Size, fx: number, fy: number, interpolation: number): GMat;

src: input image.
dsize: output image size; if it equals zero, it is computed as:

\texttt{dsize = Size(round(fx*src.cols), round(fy*src.rows))}

Either dsize or both fx and fy must be non-zero.
fx: scale factor along the horizontal axis; when it equals 0, it is computed as

\texttt{(double)dsize.width/src.cols}
fy: scale factor along the vertical axis; when it equals 0, it is computed as

\texttt{(double)dsize.height/src.rows}
interpolation: interpolation method, see cv::InterpolationFlags

Returns

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

Upstream declaration ↗

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