2014 4.20
近期想做一个关于图像处理的软件玩玩，可惜也没有什么特别的想法，就当玩玩好了，准备用Opencv开源库实现下简单的功能吧。
Opencv是一个专业的图像处理库，里面有非常多基础函数能够实现非常多非常多功能，明天開始动工吧，真是兴致来了挡也档不住，思考一晚上！
2014 4.21
本来想用Vs2010做下，发现配置有点麻烦，还是选择Vc6干吧，选用的库为 Opencv1.0.
配置Visual C++ 6.0
全局设置
菜单Tools->Options->Directories：先设置lib路径，选择Library files，在下方填入路径：
E:\OpenCV\lib
然后选择include files，在下方填入路径：
E:\OpenCV\cxcore\include
E:\OpenCV\cv\include
E:\OpenCV\cvaux\include
E:\ml\include
E:\OpenCV\otherlibs\highgui
E:\otherlibs\cvcam\include
然后选择source files，在下方填入路径：
E:\OpenCV\cv\src
E:\OpenCV\cxcore\src
E:\OpenCV\cvaux\src
E:\OpenCV\otherlibs\highgui
E:\OpenCV\otherlibs\cvcam\src\windows
还有就是配置系统环境变量 E:\OpenCV\bin
然后选择右边的link标签，在Object/library modules附加上
cxcore.lib cv.lib ml.lib cvaux.lib highgui.lib cvcam.lib
关于配置的基本就到这里了，该用的基本都用上了。
以下就開始做小demo測试了。
2014 4.28
近期事情有点多，偷懒不想写，还是坚持下吧。
以下做一个人脸检測的demo，基于Win32 application，功能大致实现了，代码网上也有非常多，我来分析下代码吧。
#include "cv.h" //核心头文件
#include "highgui.h"//图像处理头文件
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include <float.h>
#include <limits.h>
#include <time.h>
#include <ctype.h>
#ifdef _EiC
#define WIN32
#endif
static CvMemStorage* storage = 0;
static CvHaarClassifierCascade* cascade = 0;
void detect_and_draw( IplImage* image );
const char* cascade_name =
"D:\\OpenCV 1.0\\data\\haarcascades\\haarcascade_frontalface_alt.xml";//人脸检測库文件
/* "haarcascade_profileface.xml";*/
int main( int argc, char** argv )
{
//cascade_name = "haarcascade_frontalface_alt.xml";
cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
if( !cascade )
{
fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
return -1;
}
storage = cvCreateMemStorage(0);
cvNamedWindow( "result", 1 ); //创建一个窗体 名称为result
const char* filename = "D:\\lena.jpg"; //目标图片
IplImage* image = cvLoadImage( filename, 1 );
if( image )
{
detect_and_draw( image );
cvWaitKey(0);
cvReleaseImage( &image );
}
cvDestroyWindow("result");
return 0;
}
void detect_and_draw(IplImage* img ) //把脸部范围圈出来
{
double scale=1.2;
static CvScalar colors[] = {
{{0,0,255}},{{0,128,255}},{{0,255,255}},{{0,255,0}},
{{255,128,0}},{{255,255,0}},{{255,0,0}},{{255,0,255}}
};//Just some pretty colors to draw with
//Image Preparation
//
IplImage* gray = cvCreateImage(cvSize(img->width,img->height),8,1);
IplImage* small_img=cvCreateImage(cvSize(cvRound(img->width/scale),cvRound(img->height/scale)),8,1);
cvCvtColor(img,gray, CV_BGR2GRAY);
cvResize(gray, small_img, CV_INTER_LINEAR);
cvEqualizeHist(small_img,small_img); //直方图均衡
//Detect objects if any
//
cvClearMemStorage(storage);
double t = (double)cvGetTickCount();
CvSeq* objects = cvHaarDetectObjects(small_img,
cascade,
storage,
1.1,
2,
0/*CV_HAAR_DO_CANNY_PRUNING*/,
cvSize(30,30));
t = (double)cvGetTickCount() – t;
printf( "detection time = %gms\n", t/((double)cvGetTickFrequency()*1000.) );
//Loop through found objects and draw boxes around them
for(int i=0;i<(objects? objects->total:0);++i)
{
CvRect* r=(CvRect*)cvGetSeqElem(objects,i);
cvRectangle(img, cvPoint(r->x*scale,r->y*scale), cvPoint((r->x+r->width)*scale,(r->y+r->height)*scale), colors[i%8]);
}
/*for( int j= 0; j < (objects? objects->total : 0); j++ )
{
CvRect* r = (CvRect*)cvGetSeqElem( objects, j );
CvPoint center;
int radius;
center.x = cvRound((r->x + r->width*0.5)*scale);
center.y = cvRound((r->y + r->height*0.5)*scale);
radius = cvRound((r->width + r->height)*0.25*scale);
cvCircle( img, center, radius, colors[j%8], 3, 8, 0 );
}*/
cvShowImage( "result", img );
cvReleaseImage(&gray);
cvReleaseImage(&small_img); //记得创建的指针得释放
}
效果大致是这种，把脸部圈出来了。
