convertScaleAbs

Core and matricesfunctionOpenCV 5.0.0

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

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

ARGUMENTSsrc, dst, alpha, beta

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FUNCTIONconvertScaleAbs

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RETURN TYPEvoid

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

Scales, calculates absolute values, and converts the result to 8-bit.

On each element of the input array, the function convertScaleAbs performs three operations sequentially: scaling, taking an absolute value, conversion to an unsigned 8-bit type:

\texttt{dst} (I)= \texttt{saturate\_cast<uchar>} (| \texttt{src} (I)* \texttt{alpha} +  \texttt{beta} |)

In case of multi-channel arrays, the function processes each channel independently. When the output is not 8-bit, the operation can be emulated by calling the Mat::convertTo method (or by using matrix expressions) and then by calculating an absolute value of the result. For example:

    Mat_<float> A(30,30);
    randu(A, Scalar(-100), Scalar(100));
    Mat_<float> B = A*5 + 3;
    B = abs(B);
    // Mat_<float> B = abs(A*5+3) will also do the job,
    // but it will allocate a temporary matrix

See: Mat::convertTo, cv::abs(const Mat&)

convertScaleAbs(src: Mat, dst: Mat, alpha: number, beta: number): void;

3 available overloads

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

convertScaleAbs(src: Mat, dst: Mat, alpha: number): void;

convertScaleAbs(src: Mat, dst: Mat, alpha: number, beta: number): void;

src

input array.

dst

Output destination, filled by the native operation. output array.

alpha

optional scale factor.

beta

optional delta added to the scaled values.

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.