我正在尝试将cv::mat
变量从一个C程序中输送到另一个c程序。
我已经创建了一个从论坛和搜索中采购的基本代码,我有2个程序writer.c
和reader.c
。
writer.c
中有一个 cv::mat img
变量,我需要将其管带到 reader.c
cv::mat img
,以用 imshow()
;
我正在从多个来源中合并代码,希望这项工作,因为我可以找到一个有效的示例
我的来源:
https://stackoverflow.com/a/2789967/11632453
https://stackoverflow.com/a/30274548/11632453
https://unix.stackexchange.com/questions/222075/pipe-named-fifo
https://stackoverflow.com/a/36080965/11632453
这是我到目前为止的进化:
文件writer.c
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
#include "opencv2/imgproc/imgproc.hpp"
using namespace cv;
using namespace std;
int main()
{
Mat img;
img = imread("/home/filipe/Documentos/QT_Projects/FIFO_Writer/download.jpeg", CV_LOAD_IMAGE_COLOR); // Read the file
if(! img.data ) // Check for invalid input
{
cout << "Could not open or find the image" << std::endl ;
return -1;
}
namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
imshow( "Display window", img );
//waitKey(0); // Wait for a keystroke in the window
//return 0;
int fd;
char * myfifo = "/tmp/myfifo";
// create the FIFO (named pipe)
mkfifo(myfifo, 0666);
// write "Hi" to the FIFO
fd = open(myfifo, O_WRONLY);
//write(fd, "Hi", sizeof("Hi"));
write(fd, img.data, sizeof(img.data));
close(fd);
// remove the FIFO
unlink(myfifo);
return 0;
}
reader.c
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
#include "opencv2/imgproc/imgproc.hpp"
using namespace cv;
using namespace std;
#define MAX_BUF 1024
int main()
{
int fd;
char * myfifo = "/tmp/myfifo";
char buf[MAX_BUF];
/* open, read, and display the message from the FIFO */
fd = open(myfifo, O_RDONLY);
read(fd, buf, MAX_BUF);
printf("Received: %sn", buf);
close(fd);
Mat img(177, 284, CV_8UC3, Scalar(0, 0, 0));
img.data= ((unsigned char*) (buf));
namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
imshow( "Display window", img );
waitKey(0); // Wait for a keystroke in the window
return 0;
}
我没有此代码的错误,但是,我没有图像以太没有要创建显示图像的窗口apear。
有帮助吗?有什么可以帮助我经过的吗?有方向吗?
谢谢
在https://answers.opencv.org/question/216274/is-there-a-better-way-to-to-pipe-a-cipe-a-cvmat-variable/
在此处解决
只需根据图像大小