我试图将代码 IPL 更改为 mat
但失败了
我使用 OpenCV 4.1.2
此示例使用 OpenCV 2.4.13
https://jadeshin.tistory.com/entry/cvAcc 에-의한-배경-영상-계산
我不能使用 IPL
所以我改变了
#include <opencv2opencv.hpp>
#include <opencv2highguihighgui.hpp>
#include <opencv2coremat.hpp>
#include <opencv2imgproc.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main()
{
VideoCapture cap("ball.avi");
if (!cap.isOpened())
{
cout << "file not found." << endl;
return 0;
}
Mat image;
Size size = Size((int)CAP_PROP_FRAME_WIDTH, (int)CAP_PROP_FRAME_HEIGHT);
Mat grayImage(size, CV_8UC1);
Mat sumImage(size, CV_32FC1);
sumImage.setTo(Scalar::all(0));
int nFrameCount = 0;
for (;;)
{
cap.read(image);
if (image.empty())
{
cout << "could'nt capture" << endl;
break;
}
cvtColor(image, grayImage, COLOR_BGR2GRAY);
accumulate(grayImage, sumImage, NULL); //here is error
imshow("grayImage", grayImage);
char chKey = waitKey(50);
if (chKey == 27)
break;
nFrameCount++;
}
convertScaleAbs(sumImage, sumImage, 1.0 / nFrameCount);
imwrite("ballBkg.jpg", sumImage);
destroyAllWindows();
return 0;
}
编译没有错,但执行没有错
我也试过了,赶上
但也失败了
积累有什么问题?
C++版本的累积void accumulate(InputArray src, InputOutputArray dst, InputArray mask=noArray() )
您正在传递 NULL 而不是noArray()
. 所以只需做:
accumulate(grayImage, sumImage);
cv::noArray() is an empty Mat not NULL.
编辑:
也改变
Size size = Size((int)CAP_PROP_FRAME_WIDTH, (int)CAP_PROP_FRAME_HEIGHT);
自
Size size = Size((int)cap.get(CV_CAP_PROP_FRAME_WIDTH), (int)cap.get(CV_CAP_PROP_FRAME_HEIGHT));