OpenCV的一些功能的封装

　　写OpenCV程序的时候，感觉很多时候都会用到同样的功能，但是又需要写一大段的代码，感觉很不方面，接触C++之后，突然发现可以吧这些东西封装到一个类里面去，把接口定义的丰富一点，这样在后面时候的时候感觉挺方便的，不知道这样的可行性如何，但是感觉还是很不错的。

　　下面就是我定义的一个类，叫做Functionable,其中的头文件很源文件代码如下：

　　functionable.h:

#include <iostream>
using std::cout;
using std::endl;

#include <string>
using std::string;

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

class Functionable
{
public:
//	Functionable();
	void doShowImage(const char * filename, int waitKey, const char *windowName,int windowFlag);
	void doPlayAvi(const char *filename, int waitKey, const char *windowName, int windowFlag, int endKey );
	IplImage * doSmooth( IplImage * src );
	IplImage * doPyrDown( IplImage * src, int filter = 7,int multiple = 1);
	//The function doPyrDown didn't pass the test
	IplImage * doCanny( IplImage * sr, double lowThresh,double highThresh, double aperture );
	void doCamera( int cameraNumber, int waitKey, const char * windowName, int windowFlag, int endKey , int isSavaFile = 0, char * saveFileName = NULL );



private:
};

 　　这是functionable.cpp:

#include "functionable.h"


//function that use to show an image without some input
void Functionable::doShowImage(const char *filename, int waitKey, const char *windowName,int windowFlag){
	IplImage * img = cvLoadImage( filename );
	cvNamedWindow( windowName ,windowFlag );
	cvShowImage( windowName , img );
	cvWaitKey( waitKey );
	cvReleaseImage( &img );
	cvDestroyWindow( windowName ); 
}
//function that use to play an movie which's type is avi

void Functionable::doPlayAvi(const char *filename, int waitKey, const char *windowName, int windowFlag, int endKey )
{
	cvNamedWindow( windowName ,windowFlag );
	CvCapture * capture = cvCreateFileCapture( filename );
	IplImage * frame;
	while( 1 ){
		frame = cvQueryFrame( capture );
		if( !frame ){
			cout << "can not query frame!\n";
			break;
		}
		cvShowImage( windowName , frame );
		char c = cvWaitKey( waitKey );
		if( c == endKey )
			break;
	}
	cvReleaseCapture( &capture );
	cvDestroyWindow( windowName );
}
//let the image smoothed 
IplImage * Functionable::doSmooth( IplImage * src )
{
	IplImage * dst = cvCreateImage( cvGetSize( src ),src->depth,src->nChannels);
	cvSmooth( src, dst, CV_GAUSSIAN,3,3);
	return dst;
}
//minify the picture 
IplImage * Functionable::doPyrDown( IplImage * src, int filter ,int multiple )
{
	assert( src->width % multiple == 0 && src->height % multiple == 0);

	IplImage * dst = cvCreateImage(
		cvSize(src->width / multiple,src->height / multiple ),
		src->depth,
		src->nChannels
		);
	cvPyrDown( src,dst,filter );
	return dst;
}

//function the do canny for a picture
IplImage * Functionable::doCanny( IplImage * src, double lowThresh,double highThresh, double aperture )
{
	if( src->nChannels != 1 ){
		cout << "Can not canny the picture\n";
		return 0;
	}
	IplImage * dst = cvCreateImage(
		cvGetSize(src),
		IPL_DEPTH_8U,
		1
		);
	cvCanny( src, dst, lowThresh,highThresh, aperture );
	return dst;
}

//function that use to getVideo from camera
void Functionable::doCamera( int cameraNumber, int waitKey, const char * windowName, int windowFlag, int endKey , int isSavaFile , char * saveFileName )
{
	CvCapture* capture;
	capture = cvCreateCameraCapture( cameraNumber );
	assert( capture != NULL );
	cvNamedWindow( windowName, windowFlag );
	IplImage * frame;
	while( 1 ){
		frame = cvQueryFrame( capture );
		if( !frame ){
			cout << "can not query frame!\n";
			break;
		}
		cvShowImage( windowName , frame );
		char c = cvWaitKey( waitKey );
		if( c == endKey )
			break;
	}
	cvReleaseCapture( &capture );
	cvDestroyWindow( windowName );
}

 　　功能很不完善，有的函数还没有写完，继续...