I'm trying to run a bit of code to add trackbars onto some video, it's from the Learning OpenCV Second Edition book, but I can't compile my code and gives the error "namespace cv has no member CAP_PROP_POS_FRAMES"
Here's the first bit of the code
#include <opencv2\highgui\highgui.hpp>
#include <opencv2\imgproc\imgproc.hpp>
#include <iostream>
#include <fstream>
using namespace std;
int g_slider_position = 0;
int g_run = 1, g_dontset = 0; //start out in a single step mode
cv::VideoCapture g_cap;
void onTrackbarSlide(int pos, void *) {
g_cap.set(cv::CAP_PROP_POS_FRAMES, pos);
if(!g_dontset)
g_run = 1;
g_dontset = 0;
}
It's CV_CAP_PROP_POS_FRAMES (note the S) and it should be brought in by highgui.hpp. It's an unnamed enum in the global namespace.
Related
sorry to bother. Could you know maybe how can i fix my code. It gives me this error:
/usr/include/eigen3/Eigen/src/Core/DenseCoeffsBase.h:365: Eigen::DenseCoeffsBase<Derived, 1>::Scalar& Eigen::DenseCoeffsBase<Derived, 1>::operator()(Eigen::Index, Eigen::Index) [with Derived = Eigen::Matrix<float, -1, -1>; Eigen::DenseCoeffsBase<Derived, 1>::Scalar = float; Eigen::Index = long int]: Assertion `row >= 0 && row < rows() && col >= 0 && col < cols()' failed.
I think that I declared matrix in right way. My mistake (I think) is when i try to fill her with values in Possible transforms function. I think it might be wrong transform1(0, position)=.. I tried it to comment that lines of code and wrote a simple code like transform1(0, position)=1; and it gave the same error.
Sorry to bother,
Kind regards.
My code :
#include "ros/ros.h"
#include <cstdlib>
#include <fstream>
#include <stdio.h>
#include <regex>
#include "sensor_msgs/PointCloud2.h"
#include <pcl_conversions/pcl_conversions.h>
#include <pcl/point_types.h>
#include <pcl/PCLPointCloud2.h>
#include <pcl/conversions.h>
#include <pcl_ros/transforms.h>
#include <boost/shared_ptr.hpp>
#include "pcl_ros/point_cloud.h"
#include "sensor_msgs/PointField.h"
#include <pcl/io/pcd_io.h>
#include "nav_msgs/Odometry.h"
#include "eigen3/Eigen/SVD"
#include "eigen3/Eigen/Dense"
#include "clustering/Track.h"
#include "eigen3/Eigen/Core"
#include "eigen3/Eigen/Sparse"
using namespace Eigen;
int number_od_possible_tracks = 15;
class Odometry_class {
ros::NodeHandle nodeh;
ros::Subscriber sub;
ros::Publisher pub;
public:
Odometry_class();
void Odometry(const sensor_msgs::PointCloud2 &msg);
bool Has_pointcloud_min3points(pcl::PointCloud<pcl::PointXYZIVSI> cloud);
bool Possible_transform(pcl::PointCloud<pcl::PointXYZIVSI> cloud);
void Restore_Ids();
pcl::PointCloud<pcl::PointXYZIVSI> last_cloud;
Eigen::MatrixXf transform1 = (Eigen::MatrixXf(3,15));
Eigen::MatrixXf transform2=(Eigen::MatrixXf(3,15));
int consecutive_Ids_current[15];
int consecutive_Ids_previous[15];
int position;
void Transform();
};
Odometry_class::Odometry_class(){
sub = nodeh.subscribe("trackers", 10, &Odometry_class::Odometry, this);
pub = nodeh.advertise<nav_msgs::Odometry>("odometry", 10);
}
void Odometry_class::Odometry(const sensor_msgs::PointCloud2 &msg ){
pcl::PCLPointCloud2 pcl_pc2;
pcl_conversions::toPCL(msg, pcl_pc2);
pcl::PointCloud<pcl::PointXYZIVSI> cloud;
pcl::fromPCLPointCloud2(pcl_pc2, cloud);
if(Possible_transform(cloud)){
ROS_INFO("Transformation is possible");
}
else{
ROS_INFO("Transformation is not possible");
}
Restore_Ids();
pcl::fromPCLPointCloud2(pcl_pc2, last_cloud);
}
void Odometry_class::Restore_Ids(){
int i=0;
while(consecutive_Ids_current[i]!=0){
consecutive_Ids_current[i]=0;
consecutive_Ids_previous[i]=0;
i++;
}
}
bool Odometry_class::Has_pointcloud_min3points(pcl::PointCloud<pcl::PointXYZIVSI> cloud){
bool has=false;
if(cloud.width>=3){
has=true;
}
return has;
}
bool Odometry_class::Possible_transform(pcl::PointCloud<pcl::PointXYZIVSI> cloud){
bool possible=false;
position=0;
if(Has_pointcloud_min3points(cloud)&Has_pointcloud_min3points(last_cloud)){
for(int i=0;i<cloud.width;i++){
for(int j=0;j<last_cloud.width;j++){
if(cloud[i].id==last_cloud[j].id){
consecutive_Ids_current[position]=i;
consecutive_Ids_previous[position]=j;
position++;
}
}
}
}
if(position>=3){
possible=true;
transform1.resize(3,position);
transform2.resize(3,position);
for(int i=0;i<position;i++){
transform1(0,position)= cloud[consecutive_Ids_current[i]].x;
transform1(1,position)= cloud[consecutive_Ids_current[i]].y;
transform1(2,position)= cloud[consecutive_Ids_current[i]].z;
transform2(0,position)= cloud[consecutive_Ids_previous[i]].x;
transform2(1,position)= cloud[consecutive_Ids_previous[i]].y;
transform2(2,position)= cloud[consecutive_Ids_previous[i]].z;
}
}
return possible;
}
int main(int argc, char **argv) {
ros::init(argc, argv, "Odometry");
Odometry_class Odometry;
ros::spin();
return 0;
}
I think you mixed up your loop variable, i, and upper limit, position. Using position as an index would result in accessing the matrix out of bounds, and the Eigen library catches that in an assertion. Using the loop variable should resolve the error.
transform1(0,i)= cloud[consecutive_Ids_current[i]].x;
And likewise for the rest of the transform1 and transform2 assignments.
below I've posted my code which is meant to store hits collections in HCE (hit collection of events).
The code compiles successfully but on running the program, the following error is printed to the terminal seven times:
< SiHCollection> is ambiguous.
I have a feeling it is because I am using namespace std although I don't know how to amend the code. Any thoughts?
#include "SiSD.h"
#include "SiHit.h"
#include "G4HCofThisEvent.hh"
#include "G4Step.hh"
#include "G4ThreeVector.hh"
#include "G4SDManager.hh"
#include "G4ios.hh"
#include "G4UnitsTable.hh"
#include <fstream>
#include <iostream>
#include <sstream>
using namespace std;
extern ofstream outfile;
SiSD::SiSD(G4String name)
:G4VSensitiveDetector(name)
{
collectionName.insert("SiHCollection");
}
SiSD::~SiSD(){ }
void SiSD::Initialize(G4HCofThisEvent* HCE)
{
SiHCollection = new SiHitsCollection(SensitiveDetectorName,
collectionName[0]);
static G4int HCID = -1;
if(HCID<0)
{
HCID = G4SDManager::GetSDMpointer()->GetCollectionID(collectionName[0]);
}
HCE->AddHitsCollection(HCID, SiHCollection);
}
G4bool SiSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{
if(aStep->GetTrack()->GetTrackID() > 0) {
G4double edep = aStep->GetTotalEnergyDeposit();
if(edep==0) return false;
SiHit* aHit = new SiHit();
aHit->SetEdep(edep);
SiHCollection->insert(aHit);
return true;
} else return false;
}
I have written the code to access opencv(Mainly used for image processing) function from Scilab(numerical computation software). When I run bilder gateway file, I am encountering below error.
opencv_NormalizeHist.cpp:47:34: error: 'NormalizeHist' was not declared in this scope.
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
extern "C"
{
#include "api_scilab.h"
#include "Scierror.h"
#include "BOOL.h"
#include <localization.h>
#include "../common.h"
int opencv_NormalizeHist(char *fname, unsigned long fname_len)
{
SciErr sciErr;
int iRows=0,iCols=0;
int *piAddr2 = NULL;
//checking input argument
CheckInputArgument(pvApiCtx, 2, 2);
CheckOutputArgument(pvApiCtx, 0, 0) ;
//Define histogram
Mat hist;
retrieveImage(hist,1);
double *factor;
//for value of factor
sciErr = getVarAddressFromPosition(pvApiCtx,2,&piAddr2);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
sciErr = getMatrixOfDouble(pvApiCtx, piAddr2, &iRows, &iCols ,&factor);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
NormalizeHist(hist, factor[0]); //Normalizing hist
string tempstring = type2str(hist.type());
char *checker;`enter code herek
checker = (char *)malloc(tempstring.size() + 1);
memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
returnImage(checker,hist,1); //here, remove the temp as a parameter as it is not needed, and instead add 1 as the third parameter. 1 denotes that the first output argument will be this variable
free(checker); //free memory taken up by checker, i missed this earlier
//Assigning the list as the Output Variable
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
//Returning the Output Variables as arguments to the Scilab environment
ReturnArguments(pvApiCtx);
return 0;
}
/* ==================================================================== */
}
I'm writing a little tool with llvm to parse C and C++ code, but I can't seem to get it to successfully parse C++ at all. I'm probably missing something obvious.
This is what I have so far:
#include <iostream>
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/raw_ostream.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/FrontendOptions.h"
#include "clang/Frontend/LangStandard.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/DirectoryLookup.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/Parse/ParseAST.h"
class MyASTConsumer : public clang::ASTConsumer {
public:
bool HandleTopLevelDecl(clang::DeclGroupRef d);
virtual ~MyASTConsumer() { }
};
bool MyASTConsumer::HandleTopLevelDecl(clang::DeclGroupRef d)
{
for(auto ii = d.begin(); ii != d.end(); ii++)
{
printf("decl type: %s\n", (*ii)->getDeclKindName());
auto namedDecl = llvm::dyn_cast<clang::NamedDecl>(*ii);
if(namedDecl)
{
printf("name: %s\n", namedDecl->getName().data());
}
}
return true;
}
int main(int, char **argv)
{
using clang::CompilerInstance;
using clang::TargetOptions;
using clang::TargetInfo;
using clang::FileEntry;
using clang::DiagnosticOptions;
using clang::TextDiagnosticPrinter;
using clang::SrcMgr::CharacteristicKind;
using clang::StringRef;
using clang::DirectoryLookup;
using llvm::MemoryBuffer;
using clang::LangOptions;
using clang::FrontendOptions;
using clang::LangStandard;
using clang::CompilerInvocation;
using clang::InitializePreprocessor;
using clang::Preprocessor;
using clang::PreprocessorOptions;
using clang::HeaderSearch;
using clang::HeaderSearchOptions;
CompilerInstance ci;
DiagnosticOptions diagnosticOptions;
ci.createDiagnostics();
CompilerInvocation *invocation = new CompilerInvocation;
LangOptions &langOpts = ci.getLangOpts();
langOpts.RTTI = 1;
langOpts.Bool = 1;
langOpts.CPlusPlus11 = 1;
langOpts.GNUKeywords = 1;
langOpts.CXXExceptions = 1;
langOpts.POSIXThreads = 1;
langOpts.SpellChecking = 1;
invocation->setLangDefaults(langOpts, clang::IK_CXX, LangStandard::lang_gnucxx11);
ci.setInvocation(invocation);
llvm::IntrusiveRefCntPtr<TargetOptions> pto( new TargetOptions() );
pto->Triple = llvm::sys::getDefaultTargetTriple();
llvm::IntrusiveRefCntPtr<TargetInfo> pti(TargetInfo::CreateTargetInfo(ci.getDiagnostics(), pto.getPtr()));
ci.setTarget(pti.getPtr());
ci.createFileManager();
auto &fileManager = ci.getFileManager();
ci.createSourceManager(fileManager);
llvm::IntrusiveRefCntPtr<HeaderSearchOptions> headerSearchOpts( new HeaderSearchOptions() );
ci.createPreprocessor();
auto &pp = ci.getPreprocessor();
pp.setPredefines(builtinMacros);
HeaderSearch &headerSearch = pp.getHeaderSearchInfo();
for(auto &inc: builtinIncludePaths)
{
auto dirEntry = fileManager.getDirectory(StringRef(inc), true);
DirectoryLookup dirLookup(dirEntry, CharacteristicKind::C_System, false);
headerSearch.AddSearchPath (dirLookup, true);
}
MyASTConsumer *astConsumer = new MyASTConsumer();
ci.setASTConsumer(astConsumer);
ci.createASTContext();
const FileEntry *pFile = fileManager.getFile(argv[1]);
auto &sourceManager = ci.getSourceManager();
sourceManager.createMainFileID(pFile);
ci.getDiagnosticClient().BeginSourceFile(
ci.getLangOpts(),
&pp
);
clang::ParseAST(pp, astConsumer, ci.getASTContext());
ci.getDiagnosticClient().EndSourceFile();
return 0;
}
It does parse C just fine, but it errors out on the namespace keyword and extern "C" { blocks. So far I'm stumped. If anyone has a clue, something I'm missing, please share.
I believe I figured out the problem. You should always call setInvocation on the compiler instance before calling a lot of the methods on the compiler instance, as it actually just proxies to the invocation.
I moved the setInvocation call to right after the CompilerInvocation object is created, and things now work.
I have a c++ program that generates random files filled with gibberish, but for it to work it needs to run in the background. The method I am using generates a null window. I have made other programs using this background method, but it doesn't work in this program:
#include <iostream>
#include <string>
#include <time.h>
#include <stdlib.h>
#include <fstream>
#include <windows.h>
using namespace std;
string random(int len)
{
string a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
string r;
srand(time(NULL));
for(int i = 0; i < len; i++) r.push_back(a.at(size_t(rand() % 62)));
return r;
}
int main(){
restart:
/*This is the background code*/
HWND window;
AllocConsole();
window - FindWindowA("ConsoleWindowClass", NULL);
ShowWindow(window, 0);
std::string file=random(1);
std::ofstream o(file.c_str());
o << random(999) << std::endl;
goto restart;
return 0;
}
I am using the dev C++ compiler
I just realized my problem, the goto statement needed to not include the null window rendering part, so the window wasn't re-rendered and de-rendered every time. Also there was a - that needed to be an =.