matlab opencv resize rotated by 180

Question

michael scheinfeild 2019-5-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464198-matlab-opencv-resize-rotated-by-180

hello all mexOpenCV to compile opencv code and use opencv resize , it works good but i recive rotated image by 180 , how i can correct this

also i want input and output will be uint8 and not single here is cpp file

also i need diffrent size at outputs(currenlty it is 227*227)

code::

mexOpenCV ResizeCV.cpp
peppersSmall=ResizeCV(single(peppersBig));

================

#include "opencvmex.hpp"
#define _DO_NOT_EXPORT
#if defined(_DO_NOT_EXPORT)
#define DllExport  
#else
#define DllExport __declspec(dllexport)
#endif
///////////////////////////////////////////////////////////////////////////
// Check inputs
///////////////////////////////////////////////////////////////////////////
void checkInputs(int nrhs, const mxArray *prhs[])
{    
	const mwSize * tdims, *fdims;
        
    // Check number of inputs
    if (nrhs != 1)
    {
        mexErrMsgTxt("Incorrect number of inputs. Function expects 2 inputs.");
    }
    
    // Check input dimensions
    tdims = mxGetDimensions(prhs[0]);
    //fdims = mxGetDimensions(prhs[1]);
    
    if (mxGetNumberOfDimensions(prhs[0])>2)
    {
        mexErrMsgTxt("Incorrect number of dimensions. First input must be a matrix.");
    }
    
}
///////////////////////////////////////////////////////////////////////////
// Main entry point to a MEX function
///////////////////////////////////////////////////////////////////////////
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{  
	// Check inputs to mex function
    checkInputs(nrhs, prhs);
    
    // Convert mxArray inputs into OpenCV types
  
    cv::Ptr<cv::Mat> imgCV         = ocvMxArrayToImage_single(prhs[0], true);
    
    // Allocate output matrix
    int outRows = 227;
    int outCols = 227;
    
    cv::Mat outCV;
    
    // Run the OpenCV template matching routine
    cv::resize(*imgCV,outCV, cv::Size(227,227) ,0,0, cv::INTER_CUBIC );
    
    // Put the data back into the output MATLAB array
    plhs[0] = ocvMxArrayFromImage_single(outCV);
}