multiply

Core and matricesfunctionOpenCV 5.0.0

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

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

ARGUMENTSsrc1, src2, dst, scale

FUNCTIONmultiply

RETURN TYPEvoid

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

Calculates the per-element scaled product of two arrays.

The function multiply calculates the per-element product of two arrays:

\texttt{dst} (I)= \texttt{saturate} ( \texttt{scale} \cdot \texttt{src1} (I)  \cdot \texttt{src2} (I))

There is also a MatrixExpressions -friendly variant of the first function. See Mat::mul .

For a not-per-element matrix product, see gemm .

Note: Saturation is not applied when the output array has the depth CV_32S. You may even get result of an incorrect sign in the case of overflow.

Note: (Python) Be careful to difference behaviour between src1/src2 are single number and they are tuple/array. multiply(src,X) means multiply(src,(X,X,X,X)). multiply(src,(X,)) means multiply(src,(X,0,0,0)).

See: add, subtract, divide, scaleAdd, addWeighted, accumulate, accumulateProduct, accumulateSquare, Mat::convertTo

multiply(src1: Mat, src2: Mat, dst: Mat, scale: number, dtype: number): void;

3 available overloads

multiply(src1: Mat, src2: Mat, dst: Mat): void;

multiply(src1: Mat, src2: Mat, dst: Mat, scale: number): void;

multiply(src1: Mat, src2: Mat, dst: Mat, scale: number, dtype: number): void;

src1: first input array.
src2: second input array of the same size and the same type as src1.
dst: Output destination, filled by the native operation. output array of the same size and type as src1.
scale: optional scale factor.
dtype: optional depth of the output array

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.