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我试图绘制3通道图像的直方图,以及“opencv_tut.exe中0x752e812f处未处理的异常:Microsoft C++异常:内存位置0x0019ef5c处的cv :: Exception”这个错误。甚至不能调试它继续进入组装。使用3通道使用opencv创建直方图图表
问题是在直方图中的线条绘制部分,其他人只是正常工作。
下面是代码:
空隙colorHistogram(){
Mat image = imread("c:/aaa.jpg");
vector<Mat> bgr_planes;
split(image, bgr_planes);
if(!image.data){
cout<<"No image"<<endl;
}
int histSize = 256;
float range[] = {0, 256};
const float* histRange = {range};
Mat b_hist, g_hist, r_hist;
calcHist(&bgr_planes[0], 1, 0, Mat(), b_hist, 1, &histSize, &histRange, true, false);
calcHist(&bgr_planes[1], 1, 0, Mat(), g_hist, 1, &histSize, &histRange, true, false);
calcHist(&bgr_planes[2], 1, 0, Mat(), r_hist, 1, &histSize, &histRange, true, false);
int hist_w = 512;
int hist_h = 400;
int bin_w = cvRound((double) hist_w/histSize);
Mat histImage(hist_h, hist_w, CV_8UC3, Scalar(0,0,0));
normalize(b_hist, b_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat());
normalize(g_hist, g_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat());
normalize(r_hist, r_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat());
for(int i=0; i<histSize; i++){
line(histImage, Point(bin_w*(i-1), hist_h - cvRound(b_hist.at<float>(i-1))) , Point(bin_w*(i), hist_h - cvRound(b_hist.at<float>(i))), Scalar(255, 0, 0), 2, 8, 0 );
line(histImage, Point(bin_w*(i-1), hist_h - cvRound(g_hist.at<float>(i-1))), Point(bin_w*(i), hist_h - cvRound(g_hist.at<float>(i))), Scalar(0, 255, 0), 2, 8, 0 );
line(histImage, Point(bin_w*(i-1), hist_h - cvRound(r_hist.at<float>(i-1))) , Point(bin_w*(i), hist_h - cvRound(r_hist.at<float>(i))), Scalar(0, 0, 255), 2, 8, 0 );
}
namedWindow("Histogram", CV_WINDOW_AUTOSIZE);
imshow("Histogram", histImage);
}
ty ..我只是复制这段代码因为它正在做我所需要的。 0是问题。 – 2013-03-07 17:52:13