opencv导入txt数据，画两幅图像的匹配点（像素精度）

#include <opencv2/opencv.hpp> using namespace cv; //-----------------------画匹配线--------------------------- static Scalar randomColor(RNG& rng) { int icolor = (unsigned)rng; return Scalar(icolor&255, (icolor>>8)&255, (icolor>>16)&255); } int main(int argc, char* argv[]) { IplImage *img1,*img2,*dst1,*dst2,*dst_big;//img1 img2 原图 dst1、dst2缩放后的图 dst_big 大图 CvRect rect1=cvRect(0,0,1920,1920);//两个ROI区域 CvRect rect2=cvRect(1920,0,1920,1920); img1=cvLoadImage("360_1.jpg"); img2=cvLoadImage("360_2.jpg"); dst1=cvCreateImage(cvSize(1920,1920),img1->depth,3); dst2=cvCreateImage(cvSize(1920,1920),img2->depth,3); dst_big=cvCreateImage(cvSize(3840,1920),img2->depth,3); cvResize(img1,dst1);//放缩 cvResize(img2,dst2); cvSetImageROI(dst_big,rect1);//设置ROI cvCopy(dst1,dst_big); cvSetImageROI(dst_big,rect2); cvCopy(dst2,dst_big); cvResetImageROI(dst_big);//释放ROI //----------------画匹配线------------------- FILE *file = fopen("input_point1.txt","r");; int line_num=1; int i; Point2d point1,point2; RNG rng(0xFFFFFFFF); while(!feof(file))//feof()有两个返回值:如果遇到文件结束，函数feof（）的值为非零值，否则为0。EOF作为文件结束标志 if(fgetc(file)=='\n')line_num++;//注意：需要去掉txt文件中没有数据的'\n'行 fseek(file,0,SEEK_SET); for(i = 0; i < line_num; i++) { fscanf(file,"%lf,%lf,%lf,%lf", &(point1.x), &(point1.y), &(point2.x), &(point2.y)); printf("%lf,%lf,%lf,%lf\n", point1.x, point1.y, point2.x, point2.y); cvLine(dst_big,cvPoint(point1.x,point1.y),cvPoint(point2.x+1920,point2.y)/*,CV_RGB(255,0,0)*/,randomColor(rng),1);//只能画整数坐标的直线，像素精度 } printf("line=%d\n",line_num); IplImage *temp_img = cvCreateImage(cvSize(1600,800),img2->depth,3); cvResize(dst_big,temp_img); IplImage *dst=cvCreateImage(cvSize(1600,800),temp_img->depth,3); cvCopy(temp_img,dst); cvNamedWindow("Display"); cvShowImage("Display",dst);//显示合并后的大图 cvWaitKey(); cvReleaseImage(&img1);//释放图像空间 cvReleaseImage(&img2); cvReleaseImage(&dst1); cvReleaseImage(&dst2); cvReleaseImage(&dst_big); cvReleaseImage(&dst); fclose(file); return 0; }