I'm using openCV-3.2.0 and getting an identifier undefined error when initializing the line :
CvRTrees rtrees;
I think i have added all the necessary header files. So why am i getting this error?
#include <stdio.h>
#include<conio.h>
#include <opencv/cv.h>
#include <opencv2/highgui/highgui.hpp>
#include <opencv/cvaux.h>
#include <opencv/ml.h>
#include <opencv2/core/core.hpp>
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <math.h>
#include <windows.h>
#include <string>
#include <stdlib.h>
#include <exception>
#include <array>
#include "opencv2/ml/ml.hpp"
using namespace std;
using namespace cv;
This class exists in OpenCV 2.4.x, However it is not available in newer versions of OpenCV like 3.2.0. Check here the list of all cv::ml classes for OpenCV 3.2.0. I suggest you to use RTrees instead. To do this you do not need to include all headers, just include the machine learning module:
#include "opencv2/ml/ml.hpp"
Related
I was getting SIGILL Runtime Error on one of my codes.
But then i noticed that just changing the libraries used made it run normally.
Previous code(throws Runtime Error on C++14):
#pragma GCC target("avx2")
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <list>
#include <chrono>
#include <random>
#include <cstdlib>
#include <cmath>
#include <ctime>
#include <cstring>
#include <iomanip>
Modified version(Gave AC on C++14):
#include<bits/stdc++.h>
What might be the reason for this?
#include <DriverSpecs.h>
_Analysis_mode_(_Analysis_code_type_user_code_)
#define INITGUID
//#include<iostream>
#include <windows.h>
#include <strsafe.h>
#include <cfgmgr32.h>
#include <stdio.h>
#include <stdlib.h>
#include "public.h"
When I tried to use <iostream> in a sample driver solution I got an error.
I'd like to know if is it possible to get input or output while a driver is running.
I'm trying to follow this tutorial for object detection but I stuck at the beginning.
Until now my code is this:
#include <stdio.h>
#include <stdlib.h>
#include <opencv2/opencv.hpp>
#include <fstream>
#include <iostream>
#include <string>
#include <dirent.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
using namespace cv;
using namespace std;
int main() {
Ptr<DescriptorExtractor> extractor = DescriptorExtractor::create("SURF");
//Mat training_descriptors(1, extractor->descriptorSize(), extractor->descriptorType());
extractor->descriptorSize();
return 0;
}
The following line extractor->descriptorSize(); gives a Segmentation fault (core dumped) and I don't know why. Do you have any ideas?
I found out that the nonfree module of OpenCV was not installed. After installation I included the nonfree library #include <opencv2/nonfree/nonfree.hpp> and then called cv::initModule_nonfree();. The problem is solved.
I am using jni and want to read file from path, i used:
while (std::getline(file, str)) {
...
}
but it get an error : Function 'getline' could not be resolved, i have added:
#include <vector>
#include <string.h>
#include <jni.h>
#include <fstream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <iostream>
and they are Ok. How do i resolved this problem? Please help me.
use:
#include <string>
instead of:
#include <string.h>
The latter one is the C variant and will not have the std namespace. Also see:
Difference between <string> and <string.h>?
I am using VS 2008 with OpenCV 2.1 installed as per the installation guide. FeatureDetector/SurfFeatureDetector are listed as classes in the documentation, but they are considered "syntax error : identifier 'SurfFeatureDetector"
This is pretty much the entirety of my code.
#include "cv.h"
#include "highgui.h"
Ptr<FeatureDetector> *detect = new SurfFeatureDetector();
I've tried a bunch of random combinations to get this to work. How can I initialize a featuredetector?
You're declaring a pointer to a cv::Ptr -- you really should just have the cv::Ptr. Change your code to
#include "cv.h"
#include "highgui.h"
using namespace cv;
Ptr<FeatureDetector> detect = new SurfFeatureDetector();
and it should work.
I think you have installation problem, try resinstalling from here: sourceforge.net/projects/opencvlibrary/files/opencv-win/2.2
anther other option is that your precompiler already has __OPENCV_OLD_CV_H__ defined.
Try undefining it before #include "cv.h"
When you type #include "cv.h"
It automatically should include featurs2d. in fact cv.h includes the following:
#include "opencv2/core/core_c.h"
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc_c.h"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/video/tracking.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/flann/flann.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/legacy/compat.hpp"
You need the OpenCV 2.x style C++ include. See below
#include "opencv2/features2d/features2d.hpp"
#include "cv.h"
#include "highgui.h"
using namespace cv;
Ptr<FeatureDetector> detect = new SurfFeatureDetector();
You need to:
#include <opencv2/nonfree/nonfree.hpp>
(from here: http://answers.opencv.org/question/411/feature-detector-crash/)