"Learning OpenCV" notes--matrix and image processing--cvgemm,cvgetcol,cvgetcols and Cvgetdiag

Matrix and image Manipulation

(1) Cvgemm function

Its structure

Double Cvgemm (//matrix generalized multiplication Operation const cvarr* src1,//multiplier Matrix const cvarr* src2,//multiplier matrix double alpha,//1 number matrix coefficient const cvarr* src3,// Weighted matrix double beta,//2 number matrix coefficient cvarr* dst,//result matrix int tabc = 0//transform tag);

TABC transformation markers and their corresponding meanings

cv_gemm_a_t	Transpose SRC1
cv_gemm_b_t	Transpose SRC2
cv_gemm_c_t	Transpose SRC3

the corresponding multiplication formula for the function is: DST = (ALPHA*SRC1) xsrc2+ (BETA*SRC3)

Instance Code

#include <cv.h> #include 

Output results



(2) Cvgetcol function
Its structure

cvmat* Cvgetcol (//Take out a column in the Matrix  const cvarr* arr,//target matrix  cvmat* submat,//matrix pointer  int col//The number of columns to be fetched);

Instance Code

#include <cv.h> #include 

Output results



(3) Cvgetcols function
Its structure

cvmat* cvgetcols (//Remove some columns in the matrix const cvarr* arr,//target matrix cvmat* submat,//matrix pointer int start_col,//start column. Includes the int end_col//end column. not included);

Instance Code

#include <cv.h> #include 

Output results



(4) Cvgetdiag function
Its structure

cvmat* Cvgetdiag (///Take out a specific diagonal const cvarr* arr,//target matrix cvmat* submat,//matrix pointer int diag = 0//control scalar, 0 main diagonal, 1 or-1 for 0 adjacent diagonal. And so on
);

Instance Code

#include <cv.h> #include 

Output results



To be Continued

 
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"Learning OpenCV" notes--matrix and image processing--cvgemm,cvgetcol,cvgetcols and Cvgetdiag