opencv::core

Function gemm

Source 
pub fn gemm(
    src1: &impl ToInputArray,
    src2: &impl ToInputArray,
    alpha: f64,
    src3: &impl ToInputArray,
    beta: f64,
    dst: &mut impl ToOutputArray,
    flags: i32,
) -> Result<()>
Expand description

Performs generalized matrix multiplication.

The function cv::gemm performs generalized matrix multiplication similar to the gemm functions in BLAS level 3. For example, gemm(src1, src2, alpha, src3, beta, dst, GEMM_1_T + GEMM_3_T) corresponds to block formula

In case of complex (two-channel) data, performed a complex matrix multiplication.

The function can be replaced with a matrix expression. For example, the above call can be replaced with:

   dst = alpha*src1.t()*src2 + beta*src3.t();

§Parameters

  • src1: first multiplied input matrix that could be real(CV_32FC1, CV_64FC1) or complex(CV_32FC2, CV_64FC2).
  • src2: second multiplied input matrix of the same type as src1.
  • alpha: weight of the matrix product.
  • src3: third optional delta matrix added to the matrix product; it should have the same type as src1 and src2.
  • beta: weight of src3.
  • dst: output matrix; it has the proper size and the same type as input matrices.
  • flags: operation flags (cv::GemmFlags)

§See also

mulTransposed, transform

§C++ default parameters

  • flags: 0