Computes partial derivatives of the matrix product for each multiplied matrix

[dABdA, dABdB] = cv.matMulDeriv(A, B)

Input

• A First multiplied matrix.
• B Second multiplied matrix.

Output

• dABdA First output derivative matrix d(A*B)/dA of size (A.rows * B.cols)x(A.rows * A.cols) and same type as A.
• dABdB Second output derivative matrix d(A*B)/dB of size (A.rows * B.cols)x(B.rows * B.cols) and same type as A.

The function computes partial derivatives of the elements of the matrix product A*B with regard to the elements of each of the two input matrices. The function is used to compute the Jacobian matrices in cv.stereoCalibrate but can also be used in any other similar optimization function.