i made a code for solving soduko and now i want to convert sudoku of real life to digital grid using opencv. But i can't import libraries in vscode 2019. Plz help. i get include error
i can't find anywhere how to get it to work. I dont want to work in visual basic but just c++ file
#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
so i get import errors on these and i can't find where to import it. I added to Path the opencv bin folder
Related
I want to use CUDA/GPU in OpenCV in Visual Studio. For example, cuda::GpuMat. I successfully build OpenCV with the extra modules with CUDA enabled
I tried the following code
#include <string>
#include <opencv2/core/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/photo/cuda.hpp>
#include <opencv2/photo.hpp>
using namespace std;
using namespace cv;
int main(){
string imageName("input.bmp");
//CPU version
Mat image = imread(imageName.c_str(), IMREAD_GRAYSCALE);
//CUDA version
cuda::GpuMat imageGPU;
cuda::GpuMat downloadGPU;
Mat buff;
imageGPU.upload(image);
downloadGPU.download(buff);
imwrite("gpu.bmp", buff);
return 0;
}
But I get an unhandled exception error.
I originally downloaded OpenCV in C:\Users\me\Downloads\opencv
I then downloaded and installed the latest OpenCV extra modules with CUDA on in
In Property Pages->C/C++->General->Additional Include Directories, I have:
C:\Users\me\Downloads\opencv\build\include\opencv
C:\Users\me\Downloads\opencv\build\include\opencv2
C:\Users\me\Downloads\opencv\build\include\
In Property Pages->Linker->General->Additional Library Directories, I have:
C:\Users\me\Downloads\opencv\build\x64\vc15\lib
and in Property Pages->Linker->Input->Additional Dependencies, I have:
opencv_world343d.lib
opencv_world343.lib
what else am I supposed to include so I can get GpuMat to work properly?
Most of the cases, yes, but you need to know which library you need to add, it may be cufft.lib, cublas.lib, cudnn.lib, etc. It depends of the function you use inside your code.
Opencv includes a cmake include file that would set all of this up for you if you use cmake to build you VS test project. This file will be in the root of the opencv install directory, i.e. after building opencv running cmake --install or the equivalent in VS. The file is OpenCVConfig.cmake, and it would be included in the CMakeLists.txt file for your project. Then you would call FindPackage(OpenCV), which would locate the OpenCV install, setup a few variables, which you would then use to link against your app.
I can post a sample CMakeList.txt file if you feel that would help.
I've built OpenCV from source along with the contrib modules. But when I include the tracking module with:
#include <opencv2/tracking.hpp>
or
#include <opencv2/tracking/tracking.hpp>
or
#include <opencv2/video/tracking.hpp>
and then try to use a tracker like this:
cv::Ptr<cv::Tracker> tracker;
I get an error saying that "Tracker is not a member of 'cv'".
What is the proper way to include the tracking API and how can I troubleshoot possible installation errors?
First, I am new to C++ and dlib but I have successfully built the examples and started working on my own project. Things have been progressing smoothly until I try to save a jpeg. Attempting to compile code using dlib::save_jpeg throws a linker error and I cannot track down the solution. I have attempted to add #define DLIB_JPEG_SUPPORT above and below my #includes but no luck. I am using XCode and used cmake -G "Xcode" .. when I compiled the examples. Relevant code below. Since I am on a Mac, I have added header and library search paths for X11 (for dlib gui), OpenCV, and DLIB. I have libjpeg.dylib and linked that to my project with and without #define DLIB_JPEG_SUPPORT in main.cpp. Is there some other build setting I need to specify? Thank you in advance for your help.
Finally, I have seen other questions and pages about dlib and libjpeg issues but no luck yet. And yes I have source.cpp included in the project.
// the standard stuff
#include <string>
#include <iostream>
#include <unistd.h>
// opencv mat object
#include <opencv2/opencv.hpp>
// dlib>
#include <dlib/opencv.h>
#include <dlib/image_io.h>
#include <dlib/gui_widgets.h>
#include <dlib/image_transforms.h>
int main(int argc, const char * argv[]) {
// retrieving images from a TCP connection
// decode data stream
img = cv::imdecode(rawImage, CV_LOAD_IMAGE_COLOR);
// perform image processing
dlib::cv_image<dlib::bgr_pixel> d_image(img);
// finally save the result to jpg
std::string fname = argv[1] + std::to_string(image_id) + ".jpg";
dlib::save_jpeg(d_image, fname); // <- line that won't compile
return 0;
}
After quit a bit of struggling and side-by-side comparisons I finally found the issue. In XCode go to to Build Settings and modify Other Linker Flags, Run Search Paths, and Other C++ Flags to match the compiled and working face_ex example. I wholesale copied all of those flags and included a missing libjpeg.dylib and was able to get things running. It should look something like this for the C++ flags . Hope this helps the next person.
my name is Ulrich and I just started writing my bachelor thesis, which includes a part where i write a program, which needs a Singular Value Decompostion.
At first i need to say, English is my 2nd language and I'm totally new to programming. So please help me with easy words ;)
After some research, I found that Armadillo offers a good SVD()-function, which is based on the Lapack library, so I downloaded them both and tried to install them correctly, and I think i failed at that part:
So here is the relevant parts of my written code:
#include <iostream>
#include <vector>
#include <random>
#include <time.h>
#include <math.h>
#include <fstream>
#include <cmath>
#include <sstream>
#include <armadillo>
using namespace std;
using namespace arma;
mat A(N,2*N+1, fill::zeros); //the zeroess will be replaced later, don't worry i know a SVD of zeroes is stupid ;)
mat U;
mat V;
vec S=svd(A);
The compilation error is:
undefined reference to 'dgesdd_'
What I use:
Code Blocks with MinGW compiler (Probably latest version; I installed it 3 days ago).
Armadillo Library 4.650.4
Lapack Library 3.5.0
Windows 8.1
What I have done:
I linked in the settings of Codeblocks the compiler with the Folder containing a lot of .header files from Armadillo (.../include/armadillo_bits/)
and i linked in the same way the Lapack folder with 4 .header files(.../lapacke/include/)
Furthermore the readme from armadillo said I shall comment out certain lines from a file called config.hpp
i looked through the whole file, but i think i don't have to uncomment anything. but just in case you need to see it, I can upload the file for you.
PS: while searching for a solution I came across this question which looked quite similar to my problem and seems to be easy fixable, but unfortunately I don't understand anything of it:
Question from stackoverflow
i hope you can help me with this,
Ulli
So i am really new to openCV and all the image recognition stuff. So i use monodevelop and i installed OpenCV using apt-getand i included these files
include "opencv2/highgui/highgui.hpp"
include "opencv2/imgproc/imgproc.hpp"
include <opencv2/opencv.hpp>
include <opencv2/imgproc/imgproc.hpp>
include<iostream>
include<vector>
include<algorithm>
include <X11/Xlib.h>
include <X11/Xutil.h>
but this function convexityDefects() shows as undefined
EDIT
So the problem is that the compiler shows that function convexityDefects is not defined in this scope
Here is the full code that i cant get to work -> Code
Could you please point me out!?
Thank you.
So i found the answer i was looking for.....
The libraries i used to compile my project where in wrong location.
so i used pkg-config --libs --cflags opencv to find exactly where are my libs....
After that i included these libraries in Code-Blocks and everything magicly started to work.