opencv中的图像阀值操作

 在OpenCv中提供一种自适应阀值技术,这种方法由cvAdaptiveThreadshold()来实现

#include <cv.h>
#include <highgui.h>
#include <math.h>
IplImage *Igray=0, *It = 0, *Iat;
int main( int argc, char** argv )
{
     if(argc != 7){return -1;          }
     //Command line
     double threshold = (double)atof(argv[1]);
     int threshold_type = atoi(argv[2]) ?
              CV_THRESH_BINARY : CV_THRESH_BINARY_INV;
     int adaptive_method = atoi(argv[3]) ?
              CV_ADAPTIVE_THRESH_MEAN_C : CV_ADAPTIVE_THRESH_GAUSSIAN_C;
     int block_size = atoi(argv[4]);
     double offset = (double)atof(argv[5]);
     //Read in gray image
     if((Igray = cvLoadImage( argv[6], CV_LOAD_IMAGE_GRAYSCALE)) == 0){
          return     -1;}
     // Create the grayscale output images
     It = cvCreateImage(cvSize(Igray->width,Igray->height),
                          IPL_DEPTH_8U, 1);
     Iat = cvCreateImage(cvSize(Igray->width,Igray->height),
                          IPL_DEPTH_8U, 1);
     //Threshold
     cvThreshold(Igray,It,threshold,255,threshold_type);
     cvAdaptiveThreshold(Igray, Iat, 255, adaptive_method,
                          threshold_type, block_size, offset);
     //PUT UP 2 WINDOWS
     cvNamedWindow("Raw",1);
     cvNamedWindow("Threshold",1);
     cvNamedWindow("Adaptive Threshold",1);
     //Show the results
     cvShowImage("Raw",Igray);
     cvShowImage("Threshold",It);
     cvShowImage("Adaptive Threshold",Iat);
     cvWaitKey(0);
     //Clean up
     cvReleaseImage(&Igray);
     cvReleaseImage(&It);
     cvReleaseImage(&Iat);
   cvDestroyWindow("Raw");
   cvDestroyWindow("Threshold");
   cvDestroyWindow("Adaptive Threshold");
   return(0);
}