一段时间以来,我一直在尝试用 OpenCV 构建一个小的光流示例。除了函数调用 calcOpticalFlowPyrLK 之外,一切正常,它在控制台窗口中打印以下失败的断言:
OpenCV 错误:断言失败 (mytype == typ0 || (CV_MAT_CN(mytype) == CV_MAT_CV(type0) && ((1 << type0) & fixedDepthMask) != 0)) 在未知函数中,文件...... \src\opencv\modules\core\src\matrix.cpp,第 1421 行
我正在解析的视频分为 300 张图像,分别标记为“caml00000.jpeg”、“caml00001.jpeg”、...、“caml00299.jpeg”。这是我写的代码:
#include <cv.h>
#include "opencv2/highgui/highgui.hpp"
using namespace cv;
using namespace std;
int main( int argc, char** argv ){
char buff[100];
int numFrames=300;
char fileFormat[]="images/caml%05d.jpeg";
string winname="Test Window";
vector<Mat> imgVec(numFrames);
auto itrImg=begin(imgVec);
auto itrEnd=end(imgVec);
vector<Point2f> featuresPrevious;
vector<Point2f> featuresCurrent;
namedWindow( winname, CV_WINDOW_AUTOSIZE );
int fileNum=0;
while(itrImg!=itrEnd){
Mat& imgRef=*itrImg; //get this frame's Mat from the vector iterator
//Calculate the name of the file;
sprintf(buff,fileFormat,fileNum);
string fileName=buff;
//string fileName="kitty.jpg"; //attempted using a static picture as well
cout << fileName << endl;
Mat cImage=imread(fileName, CV_LOAD_IMAGE_GRAYSCALE);
cImage.convertTo(imgRef, CV_8U); //also tried CV_8UC1
featuresPrevious=std::move(featuresCurrent);
goodFeaturesToTrack(imgRef,featuresCurrent,30, 0.01, 30); //calculate the features for use in next iteration
if(!imgRef.data){ //this never executes, so there isn't a problem reading the files
cout << "File I/O Problem!" << endl;
getchar();
return 1;
}
if(fileNum>0){
Mat& lastImgRef=*(itrImg-1); //get the last frame's image
vector<Point2f> featuresNextPos;
vector<char> featuresFound;
vector<int> err;
calcOpticalFlowPyrLK(lastImgRef,imgRef,featuresPrevious,featuresNextPos,featuresFound,err); //problem line
//Draw lines connecting previous position and current position
for(size_t i=0; i<featuresNextPos.size(); i++){
if(featuresFound[i]){
line(imgRef,featuresPrevious[i],featuresNextPos[i],Scalar(0,0,255));
}
}
}
imshow(winname, imgRef);
waitKey(1000/60); //not perfect, but it'll do
++itrImg;
++fileNum;
}
waitKey(0);
return 0;
}
我读到的关于这个异常的唯一一件事是它是在 Mats 采用不同格式时引起的,但是我尝试读取静态图像(参见上面关于“kitty.jpg”的代码),我仍然得到相同的失败断言. 有任何想法吗?