cvMatchTemplate无法获得结果?
问题描述:
我有两个字符“U”的图像。我使用cvMatchTemplate函数比较它们的相似性。然后,我使用cvMinMaxLoc 函数来查找像素及其相应位置的最大值和最小值。 但是,当我比较它们时,它返回一个最大值与字符“Q”和最大值和最小值是相同的。我不明白这里有什么问题? 图像的大小是相同的。 我的代码是:cvMatchTemplate无法获得结果?
#include "cv.h"
#include "cxcore.h"
#include "highgui.h"
#include <iostream>
#include <stdio.h>
using namespace std;
using namespace cv;
int main()
{
char text[]={'Q','U'};
IplImage * tmp[2];
tmp[0]=cvLoadImage("D:\\Standards\\u.bmp",1);
tmp[1]=cvLoadImage("D:\\Standards\\q.bmp",1);
IplImage* src;
IplImage* dst;
IplImage* gray;
IplImage* grayThresh;
IplImage* gray1[1];
IplImage* grayThresh1[1];
int threshold = 120, maxValue = 255;
int thresholdType = CV_THRESH_BINARY;
src = cvLoadImage("D:\\OU.bmp", 1);
gray = cvCreateImage(cvSize(src->width,src->height), IPL_DEPTH_8U, 1);
cvCvtColor(src, gray, CV_BGR2GRAY);
grayThresh = cvCloneImage(gray);
cvThreshold(gray, grayThresh, threshold, maxValue, thresholdType);
for(int i=0;i<=1;i++){
gray1[i] = cvCreateImage(cvSize(tmp[i]->width,tmp[i]->height), IPL_DEPTH_8U, 1);
cvCvtColor(tmp[i], gray1[i], CV_BGR2GRAY);
grayThresh1[i] = cvCloneImage(gray1[i]);
cvThreshold(gray1[i], grayThresh1[i], threshold, maxValue, thresholdType);
}
CvPoint minloc, maxloc;
double minval, maxval;
int iwidth = grayThresh1[0]->width - grayThresh->width + 1;
int iheight =grayThresh1[0]->height - grayThresh->height + 1;
IplImage *res=cvCreateImage(cvSize(iwidth,iheight),32,1);
for(int i=0;i<=1;i++){
cvMatchTemplate(grayThresh,grayThresh1[i],res,CV_TM_CCORR_NORMED);
cvMinMaxLoc(res, &minval, &maxval, &minloc, &maxloc, 0);
cout<<text[i]<<" maxval="<<maxval<<" minval="<<minval<<endl;}
cvDestroyWindow("grayThresh");
cvDestroyWindow("src");
cvDestroyWindow("dst");
cvDestroyWindow("grayThresh1");
cvReleaseImage(&src);
cvReleaseImage(&grayThresh);
cvReleaseImage(&dst);
for(int i=0;i<=1;i++)
cvReleaseImage(&grayThresh1[i]);
return 0;
}
答
你需要改变:
IplImage* gray1[1];
IplImage* grayThresh1[1];
到:
IplImage* gray1[2];
IplImage* grayThresh1[2];
请修正你的代码格式 - 这是相当难以阅读(因而难以调试)目前的形式。 – 2012-04-17 20:21:38