【opencv】学习笔记（1）——例5-1

《learning opencv》例5-1

#include <stdio.h>
#include <cv.h>
#include <highgui.h>
#include <stdio.h>

#include <opencv2/legacy/legacy.hpp>
//#pragma comment(lib, "opencv_legacy244.lib")
//void cvPyrSegmentation( IplImage* src, IplImage* dst, CvMemStorage* storage, CvSeq** comp, int a,int b,int c );
void f(
  IplImage* src,
  IplImage* dst
) {
  CvMemStorage* storage = cvCreateMemStorage(0);
  CvSeq* comp = NULL;

  cvPyrSegmentation( src, dst, storage, &comp, 4, 200, 50 );
  int n_comp = comp->total;

  for( int i=0; i<n_comp; i++ ) {
    CvConnectedComp* cc = (CvConnectedComp*)
    cvGetSeqElem( comp, i );
    // do_something_with( cc );
  }
  cvReleaseMemStorage( &storage );
}

int main(int argc, char** argv)
{

  // Create a named window with a the name of the file.
  cvNamedWindow( "pic.jpg", 1 );
  // Load the image from the given file name.
  IplImage* src = cvLoadImage( "pic.jpg" );
  if(!src) { printf("Couldn't seem to Open %s, sorry\n","pic.jpg"); return -1;}
  IplImage* dst = cvCreateImage( cvGetSize(src), src->depth, src->nChannels);
  f( src, dst);

  // Show the image in the named window
  cvShowImage( "pic.jpg", dst );

  // Idle until the user hits the "Esc" key.
  while( 1 ) { if( cvWaitKey( 100 ) == 27 ) break; }

  // Clean up and don’t be piggies
  cvDestroyWindow( "pic.jpg" );
  cvReleaseImage( &src );
  cvReleaseImage( &dst );

}

ps：使用的例子是“pic.jpg”，原来的代码中是argv【1】，具体使用是直接替换即可

今天试了例5-1，其中cvPyrSegmentation( src, dst, storage, &comp, 4,

200, 50 );这个函数总是出问题，后来百度才知道是高版本的opencv无法兼容低

版本的函数问题，然后加两个头文件便可以解决问题，
#include <opencv2/legacy/legacy.hpp>
//#pragma comment(lib, "opencv_legacy244.lib")

其中我第二个无法解析找到，所以注释后也可以编译通过了,5-1使得图像变得模

糊化，像油笔效果

补充：

1. typedef struct CvConnectedComp   
2. {  
3. double area;   //区域的面积  
4. CvScalar value;  //区域颜色的平均值  
5. CvRect rect;  //是一个区域的外接矩形  
6. CvSeq * contour;   //指向另一个序列的指针  
7. };