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[英]Debug Assertion Failed _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)
[英]OpenCV: Debug Assertion Fail (pHead->nBlockUse)
我的程序正在從網絡攝像頭獲取輸入並實時輸出高斯金字塔。 程序運行良好,但是當我退出時(通過按一個鍵觸發 waitKey()),我收到一個錯誤:
Debug Assertion Failed!
_BLOCK_TYPE_IS_VALID(pHead->nBlockUse))
Line 52: dbgdel.cpp
我懷疑這與我用來創建高斯金字塔的buildPyramid()函數有關。 輸出需要一個 Mat 數組。 輸出的墊子數量取決於層數,因此輸出需要是一個指針。 我不知道問題是初始化變量還是最后沒有被刪除。 我也可能完全不關心這個原因。
我正在用這個制作數組數組:
std::vector<cv::Mat> GPyr;
我正在用這個制作高斯金字塔:
buildPyramid(imgMatNew, GPyr, levels, BORDER_DEFAULT);
關於導致錯誤的原因的任何想法?
完整來源:
#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#include "opencv2/core/core.hpp"
#include "opencv2/flann/miniflann.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/photo/photo.hpp"
#include "opencv2/video/video.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/ml/ml.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/contrib/contrib.hpp"
#include "opencv2/core/core_c.h"
#include "opencv2/highgui/highgui_c.h"
#include "opencv2/imgproc/imgproc_c.h"
#include "opencv2\objdetect\objdetect.hpp"
using namespace cv;
using namespace std;
int main()
{
CvCapture* capture = 0;
// imgMatNew, imgMatOut were used to grab the current frame
Mat frame, frameCopy, image, imgMatNew, imgMatOut;
std::vector<cv::Mat> GPyr;
int levels = 4;
capture = cvCaptureFromCAM(CV_CAP_ANY); //0=default, -1=any camera, 1..99=your camera
if (!capture)
{
cout << "No camera detected" << endl;
}
//cvNamedWindow("result", CV_WINDOW_AUTOSIZE);
namedWindow("GPyrOut", WINDOW_AUTOSIZE);
namedWindow("imageNew", WINDOW_AUTOSIZE);
if (capture)
{
cout << "In capture ..." << endl;
for (;;)
{
// capture frame from video camera
IplImage* iplImg = cvQueryFrame(capture);
frame = iplImg;
// convert ilpImg into Mat format for easy processing
imgMatNew = cvarrToMat(iplImg, 1);
// Start Image Processing Here
buildPyramid(imgMatNew, GPyr, levels, BORDER_DEFAULT);
// Show Window
imshow("GPyrOut", GPyr[levels]); //show G Pyr, at a certain level, mex index = levels
imshow("imageNew", imgMatNew); //show window
if (waitKey(10) >= 0)
break;
}
// waitKey(0);
}
cvReleaseCapture(&capture);
return 0;
}
所以,這里有兩件事不對。
a) 你不能使用 opencv 過時的 c-api,混合 c 和 c++ 調用是直奔地獄的道路。
b) c++ 從 0 開始索引,最后一個有效索引是 size-1,所以對於 4 個級別,levels[4] 越界。 在這種情況下,請運行調試版本以獲得正確的異常!
這是更正后的代碼:
Mat frame, frameCopy, image, imgMatNew, imgMatOut;
std::vector<cv::Mat> GPyr;
int levels = 4;
VideoCapture capture(0);
if (!capture.isOpened())
{
cout << "No camera detected" << endl;
return -1;
}
//cvNamedWindow("result", CV_WINDOW_AUTOSIZE);
namedWindow("GPyrOut", WINDOW_AUTOSIZE);
namedWindow("imageNew", WINDOW_AUTOSIZE);
cout << "In capture ..." << endl;
for (;;)
{
// capture frame from video camera
capture.read(frame);
// Start Image Processing Here
buildPyramid(frame, GPyr, levels, BORDER_DEFAULT);
// Show Window
imshow("GPyrOut", GPyr[levels-1]); //show last level
imshow("imageNew", frame); //show window
if (waitKey(10) >= 0)
break;
}
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