function imagedata=improcess(filename,threshold); 
imagedata=double(imread(filename)); 
newbuf=imagedata; 
[M N]=size(imagedata); 
for i=1:1:M 
 for j=1:1:N 
  if imagedata(i,j)>threshold 
   newbuf(i,j)=255; 
  else 
   newbuf(i,j)=0; 
  end 
 end 
end 
imwrite(uint8(newbuf),'result.bmp'); 
return;

mcc -W cpplib:libMypr -T link:lib improcess.m

#include "mclmcrrt.h" 
#include "mclmcr.h" 
#include "mclcppclass.h" 
#include "matrix.h" 
#include <iostream> 
#include "libMypr.h" 
using namespace std； 
 
int main(int argc, char* argv[])  
{  
 //初始化， 在C++调用matlab时，必须要进行初始化。 
 if( !libMyprInitialize())  
 {  
  printf("Could not initialize !");  
  return -1;  
 }  
 char f_name[10]="lenna.pgm";  
//必须将lenna.pgm图像，拷贝到工程目录下  
 mwArray file_name(f_name);//'lenna.pgm' 
 mwArray m_threshold(1,1, mxDOUBLE_CLASS);  
 m_threshold(1,1)=128;//阈值为128  
 mwArray ImageData(512,512, mxDOUBLE_CLASS);  
 improcess(1,ImageData,file_name,m_threshold);  
//1,表示返回值的个数，ImageData用于接收返回值  
 printf("\n图像处理结束,已经图像以阈值128分割开！\n");  
 double *resultdata=new double[512*512];  
 ImageData.GetData(resultdata,512*512);  
 printf("\n已获得图像数据...\n");  
 for(int i=0;i<512;i++)  
 {  
  for(int j=0;j<512;j++)  
  {  
   printf("%0.1f ",resultdata[512*i+j]);  
  }  
  printf("\n");  
 }  
 delete []resultdata;  
 // 后面是一些终止调用的程序  
 // terminate the lib   
 libMyprTerminate();    
 return 0;  
}  

g++ - c test.cpp -I/usr/local/MATLAB/R2016b/extern/include/ -o test.o

export LD_LIBRARY_PATH="/home/liupeng/Desktop/test:/usr/local/MATLAB/R2016b/runtime/glnxa64:$LD_LIBRARY_PATH"

g++ -o testApp test.o -L/home/liupeng/Desktop/test
-L/usr/local/MATLAB/R2016b/runtime/glnxa64 -lmwmclmcrrt -L/home/liupeng/Desktop/test-lMypr