OpenCV实现彩色图像转换为灰度图及二值化处理

OpenCV实现彩色图像转换为灰度图及二值化处理

C++代码

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

// lab_1.cpp : 定义控制台应用程序的入口点。 //   #include "stdafx.h"    #include <cv.h> #include <cxcore.h> #include <highgui.h> #include <iostream> using namespace std;    //声明图像IplImage指针 IplImage* pSrcImg=NULL; IplImage* pGrayImg=NULL; IplImage* pBinaryImg=NULL; int Thresh=127;//初始化滑动条位置    //滑动条响应函数 void onTrackerSlid(int thresh) {     //将图像转化为二值图     pBinaryImg=cvCreateImage(cvGetSize(pSrcImg),pSrcImg->depth,pSrcImg->nChannels);     cvCopy(pSrcImg,pBinaryImg);//复制图像数据     CvScalar scalar;     int avg;           for(int i=0;i<pBinaryImg->height;i++)     {         for(int j=0;j<pBinaryImg->width;j++)         {             scalar=cvGet2D(pBinaryImg,i,j);//获取点(i,j)的像素             avg=(scalar.val[0]+scalar.val[1]+scalar.val[2])/3;             if(avg<thresh)//与阈值比较             {                 scalar.val[0]=scalar.val[1]=scalar.val[2]=0;                 cvSet2D(pBinaryImg,i,j,scalar);             }             else             {                 scalar.val[0]=scalar.val[1]=scalar.val[2]=255;                 cvSet2D(pBinaryImg,i,j,scalar);             }         }     }       //显示图像     cvShowImage("二值化图像",pBinaryImg); }   int main(int argc, char** argv) {     if(argc!=2)         argv[1]="lena.jpg";       //载入图像     if((pSrcImg=cvLoadImage(argv[1],1))!=0)     {        cout<<"按Esc键退出..."<<endl;                //将颜色空间由RGB转化为Gray        pGrayImg=cvCreateImage(cvGetSize(pSrcImg),8,1);        cvCvtColor(pSrcImg,pGrayImg,CV_RGB2GRAY);          //创建图像窗口        cvNamedWindow("原图像",CV_WINDOW_AUTOSIZE);        cvNamedWindow("灰度图像",CV_WINDOW_AUTOSIZE);          cvNamedWindow("二值化图像",CV_WINDOW_AUTOSIZE);          //添加滑动条来调节阈值        cvCreateTrackbar("阈值","二值化图像",&Thresh,255,onTrackerSlid);        onTrackerSlid(Thresh);               //显示图像        cvShowImage("原图像",pSrcImg);        cvShowImage("灰度图像",pGrayImg);                 //保存图像        cvSaveImage("Gray_Image.jpg",pGrayImg);        cvSaveImage("Binary_Image.jpg",pBinaryImg);          //等待按"Esc"键退出        while(true)            if(cvWaitKey(100)==27)                break;          //销毁窗口        cvDestroyWindow("原图像");        cvDestroyWindow("灰度图像");        cvDestroyWindow("二值化图像");          //释放图像        cvReleaseImage(&pSrcImg);        cvReleaseImage(&pGrayImg);        cvReleaseImage(&pBinaryImg);                return 0;      }      return -1; }

描述：OpenCV+VS2010实现将彩色图像转换为灰度图，然后将其二值化。