I have installed OpenCV on Windows 10 and using C++ in Visual Studio.
Now I'm trying to make a program that makes several photos then saves them.
Problem:
I made a copy of project on USB flash (go to another PC) and when I try to start it from .exe file, I get this error:
How can start it without installing 1Gb of FULL OpenCV libraries?
I tried to start from release version.
My C++ source:
#include <opencv2/opencv.hpp>
#include <iostream>
#include <stdio.h>
#include <windows.h> // For Sleep
using namespace cv;
using namespace std;
int main(int, char**)
{
VideoCapture cap(0);
// Get the frame
Mat save_img; cap >> save_img;
if (save_img.empty())
{
std::cerr << "Something is wrong with the webcam, could not get frame." << std::endl;
}
// Save the frame into a file
imwrite("test.jpg", save_img); // A JPG FILE IS BEING SAVED
return 0;
}
My settings:
P.S. I want to make light program for making photo on Windows. And how to make real portable programs.
Related
I'm doing a project with OpenCV. I am trying to run a simple code:
#include<opencv2/core.hpp>
#include<opencv2/videoio.hpp>
#include<opencv2/highgui.hpp>
#include<opencv2/imgproc.hpp>
#include<opencv2/opencv.hpp>
#include<iostream>
#include<stdio.h>
#include<math.h>
using namespace cv;
using namespace std;
int main(int argc, char** argv) {
cv::Mat img2 = cv::imread("test.jpg", 1);
if (!img2.data) // Check for invalid input
{
cout << "Could not open or find the image" << std::endl;
cv::waitKey(5000);
return -1;
}
else {
cout << "Working" << endl;
cv::waitKey(5000);
}
return 0;
}
My project is a lot more bigger then this, however something simple like this isn't working for me. I have tried many things such as full path names // and \\, even tried an IplImage and convert it into Mat still no luck.
I have tried many different file types as well. If it helps I have coded it to stop the application after hitting any button, that does not work as it isn't taking any input from my keyboard.
How can I determine what is wrong?
I had this exact issue including the part about it only working in release mode. I found out I was using the release libraries for both release and debug. Because I had followed the tutorial on the OpenCV website for visual studio (incorrectly albeit), I changed the .lib folder to the correct d.lib and that fixed it.
I've been learning a bit of c++ lately and i keep getting the same error for some reason.
Apparently, imshow isn't able to find the file.
My codes are
#include "stdafx.h"
#include<opencv2/opencv.hpp>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include<iostream>
#include <conio.h>
using namespace std;
using namespace cv;
int main()
{
cv::Mat img;
img = imread("1.png");
if (img.empty())
{
cout << "can't find da file\n\n" ;
}
cv::namedWindow("test");
cv::imshow("test",img);
waitKey(0);
}
I've tried putting it in the project folder along with the ".exe",
I tried listing the whole directory of the image using "/" and "\"
I've also tried not using any extensions in the code but to no avail.
Error Signs
Thanks for helping you guys :)
I always advise the same thing for these cases. It just needs a little lateral thinking. Change your code to this
int main()
{
ofstream test("test.txt");
test << "I'm here!!\n";
}
Now run this program, it will create a file called test.txt. Find out where that file is on your system and that's where you should put your 1.png file. Then you can go back to your original program confident that the file is in the right place and any remaining issues are a different problem.
I am new to OpenCV (OpenCV 3.2 / opencv_ffmpeg320_64.dll / Windows 10 / Visual Studio 2017) and wrote a program dealing with a video stream of a webcam. Unfortunately the program has a memory leak. After hours of searching and googling I managed to break down the problem to the following minimal example:
#include <iostream>
#include <opencv2/opencv.hpp>
#include <thread>
CvCapture *capture;
IplImage *frame;
int main(int argc, char **argv)
{
capture = cvCreateFileCapture("http://192.168.1.123:8080/CamStream");
while (true)
{
cvWaitKey(1);
frame = cvQueryFrame(capture);
if (frame)
{
std::cout << "New image" << std::endl;
}
}
return 0;
}
As you can see I am capturing of a simple HTTP stream. After the capture is created new frames are received. Unfortunately the task manager shows a never stopping increase of memory:
What could cause this problem and what are possible approaches to solve it?
This is the code that I am trying out for a basic OpenCV program. I am using OpenCV 2.4.6.
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
Mat im = imread(argc == 2 ? argv[1] : "lenna.png", 1);
if (im.empty())
{
cout << "Cannot open image!" << endl;
return -1;
}
imshow("image", im);
waitKey(0);
return 0;
}
Also I am using MinGW and am including the required libraries using this guide. On building all the OpenCV functions are declared as undefined references and the compilation generates the error message saying Launch failed. Binary not launched.
I checked the answer given here but on applying the changes I still cannot get it to work. Where am I going wrong?
I am using OpenCV 2.4.6 and a 64-bit windows 7.
It sounds like the compiler/linker can't find OpenCV.
Where is it installed ? Are you sure the headers and dynamic libraries are available to Eclipse ?
Are you sure you are linking against it ?
I coded the below which tries to hold a picture and count number hundred and finally grab all them to a video with following codec MP42(MPEG4-V2)
#include <stdAfx.h>
#include <iostream>
#include <opencv2\opencv.hpp>
using namespace cv;
using namespace std;
int n=0;
char a;
int main(int, char** argv)
{
Mat image= imread("C:\\Users\\Metin\\Desktop\\images.jpg");
Mat newimage;
VideoWriter vide ("Hopdedik.avi",CV_FOURCC('M','P','4','2'),30.0,image.size());
vide.open("Hopdedik.avi",CV_FOURCC('M','P','4','2'),30.0,image.size());
for(int n=0; n<100;n++){
cout<<n<<'\n';
std::string s= to_string(static_cast<long long>(n));
image.copyTo(newimage);
putText(newimage,s,Point(100,40),cv::FONT_HERSHEY_COMPLEX,2,cv::COLORMAP_COOL,2,2,false);
imshow("asd",newimage);
if(!vide.isOpened())cout<<"can not opened";
vide.write(newimage);
waitKey(10);
}
vide.release();
return 0;
}
I started debugging on Release mode and copied the .exe files to Virtualbox Win7-64 bit. Right after I put necessary .dll files exe works but the code can't properly create the video.
I have tried to install following two codecs:
http://www.fourcc.org/downloads/angel-potion-mpeg-4--8/
and Indeo which is: http://www.afreecodec.com/codec-by-code/iv45-160.html
But it did not work.
Once I faced a similar problem where opencv couldn't read a video. There was no warning at all. The reason was that an automated string maker resulted in "opencv_mmpeg.dll" which was missing from the system. So, I debugged up to cap_ffmpeg.cpp and found this:
#if defined WIN32 || defined _WIN32
const char* module_name = "opencv_ffmpeg"
CVAUX_STR(CV_MAJOR_VERSION) CVAUX_STR(CV_MINOR_VERSION) CVAUX_STR(CV_SUBMINOR_VERSION)
#if (defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__)
"_64"
#endif
".dll";
So, copy opencv_ffmpeg_64.dll to your folder and you might have some results. Else, you need to debug deeply. Start by inserting into your project the file opencv/modules/highgui/src/cap.cpp (and the headers needed to be compiled) so you can debug line by line. I suppose many other files will be needed to go further down into the code.