我对我正在从事的这个项目感到困惑。我的主要目标是将两个网络摄像头信息拼接在一起并对它们进行对象检测 - 边界框等......标准的东西。
不过，我无法摆脱缓冲区溢出的问题 - 下面稍微简化的代码（为了便于阅读）编译 x64 并且在我收到缓冲区溢出错误后不久，控制台中出现了这个：
"OpenCV Error: Assertion Failed (contour.checkVector(2) >= 0 && (contour.depth() == CV_32F || CV_32S) in unknown function, file...."
如果注释掉所有与轮廓有关的行（从主findContours到drawBoundingBoxes主），它编译并运行良好，直到我按空格键停止程序，然后我得到另一个缓冲区溢出错误。为了记录，我在编译 x32 时也遇到了同样的错误。
有什么帮助吗？相关代码/伪代码粘贴在下面：
// **defines.h**
//Definitions for anything in all caps, like WIDTH, HEIGHT, ERODEIT, etc...
// **protos.h**
// All function prototypes, nothing else
// **detection.cpp**
/* This is the code that related to background subtraction operations*/
#include <opencv2/opencv.hpp>
#include <iostream>
#include "defines.h"
using namespace std;
using namespace cv;
void initBackgroundSubtractor(BackgroundSubtractorMOG2 &bSub)
{
bSub.set("detectShadows", 1);
}
Mat doBackgroundSubtract(BackgroundSubtractorMOG2 &bSub, Mat panorama)
{
Mat foreground;
bSub.operator()(panorama, foreground);
erode(foreground, foreground, Mat(), Point(-1, -1), ERODEIT, BORDER_DEFAULT);
dilate(foreground, foreground, Mat(), Point(-1, -1), DILATEIT, BORDER_DEFAULT);
return foreground;
}
// **contourOps.cpp**
/* Functions that operate on, filter, or relate to OpenCV contours vectors */
#include <opencv2/opencv.hpp>
#include <vector>
#include <fstream>
#include "defines.h"
using namespace std;
using namespace cv;
/* Returns the centroid of a contour */
Point getCentroid(vector<Point> contour)
{
Point centroid;
Moments m;
m = moments(contour, false);
centroid.x = int(m.m10/m.m00);
centroid.y = int(m.m01/m.m00);
return centroid;
}
/* Draws a rectangle around a contour */
void drawBoundingBoxes(vector<vector<Point>> contours, Mat &img)
{
vector<Rect> boundRect(contours.size());
for(unsigned int j = 0; j < contours.size(); j++)
{
boundRect[j] = boundingRect(contours[j]);
rectangle(img, boundRect[j], Scalar(153,0,76), 2, 8, 0);
}
}
/* Removes contours from a vector if they're smaller than the argument "area" */
void contourSizeTrim (vector<vector<Point>> &contours, int area)
{
vector<vector<Point>>::iterator i = contours.begin();
while(i != contours.end())
{
if(contourArea(*i, false) < area)
i = contours.erase(i);
else
i++;
}
}
/* Removes contours from a vector if they're X % smaller than largest contour in vector */
void contourRelSizeTrim(vector<vector<Point>> &contours, int percent)
{
double maxArea = 0.0;
for(unsigned int i=0; i<contours.size(); i++)
{
if (contourArea(contours[i], false) > maxArea)
maxArea = contourArea(contours[i], false);
}
vector<vector<Point>>::iterator j = contours.begin();
while(j != contours.end())
{
if (contourArea(*j, false) < (double)(percent/100.0)*maxArea)
j = contours.erase(j);
else
j++;
}
}
// **realtimestitch.cpp**
#include <opencv2/opencv.hpp>
#include <opencv2/stitching/stitcher.hpp>
#include <vector>
#include <iostream>
#include "defines.h"
using namespace std;
using namespace cv;
void initStitcher(VideoCapture &capture1, VideoCapture &capture2, Stitcher &stitch)
{
capture1.set(CV_CAP_PROP_FRAME_WIDTH, WIDTH);
capture1.set(CV_CAP_PROP_FRAME_HEIGHT, HEIGHT);
capture2.set(CV_CAP_PROP_FRAME_WIDTH, WIDTH);
capture2.set(CV_CAP_PROP_FRAME_HEIGHT, HEIGHT);
detail::OrbFeaturesFinder *featureFinder = new detail::OrbFeaturesFinder(Size(3,1), 1000, 1.5f, 4);
stitch.setFeaturesFinder (featureFinder);
}
void calcCamTransform(VideoCapture &capture1, VideoCapture &capture2, Stitcher &stitch)
{
int64 t;
Mat fr1, fr2, copy1, copy2;
vector<Mat> imgs;
capture1 >> fr1;
capture2 >> fr2;
fr1.copyTo(copy1);
fr2.copyTo(copy2);
imgs.push_back(copy1);
imgs.push_back(copy2);
stitch.estimateTransform(imgs);
}
Mat doStitch(VideoCapture &capture1, VideoCapture &capture2, Stitcher &stitch)
{
Mat fr1, fr2, copy1, copy2, panorama;
vector<Mat> imgs;
capture1 >> fr1;
capture2 >> fr2;
fr1.copyTo(copy1);
fr2.copyTo(copy2);
imgs.push_back(copy1);
imgs.push_back(copy2);
Stitcher::Status status = stitch.composePanorama(imgs, panorama);
if (status != Stitcher::OK)
cout << "Error Stitching: Code: " << int(status) << endl;
return panorama;
}
// **main.cpp**
#include <opencv2/opencv.hpp>
#include <iostream>
#include <vector>
#include "defines.h"
#include "protos.h"
using namespace cv;
int main()
{
bool doTransform = true, doSizeFilter = true, doRelSizeFilter = true;
Mat pano, fGround;
vector<vector<Point>> contours;
VideoCapture cap1(0);
VideoCapture cap2(1);
Stitcher stitcher = Stitcher::createDefault();
BackgroundSubtractorMOG2 bGround;
initStitcher(cap1, cap2, stitcher);
initBackgroundSubtractor(bGround);
while (true)
{
if (doTransform)
{
calcCamTransform(cap1, cap2, stitcher);
doTransform = !doTransform;
}
pano = doStitch(cap1, cap2, stitcher);
fGround = doBackgroundSubtract(bGround, pano);
findContours(fGround, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);
if (doSizeFilter)
contourSizeTrim(contours, AREATHRESH);
if (doRelSizeFilter)
contourRelSizeTrim(contours, RELSIZEPERCENT);
drawBoundingBoxes(contours, pano);
imshow("Stitched Image", pano);
if(waitKey(1) >= 0)
break;
}
return 0;
}