I have cross compiled sample c++ program for riscv,and i am trying to executing in riscv-linux.Here riscv-linux there is now facility to display image as a result,so i am generating a result image matrix as a Text file and i am planing to see result in X86 architecture.but i am getting error before generating text file.

Makefile:-

CXX =riscv64-unknown-linux-gnu-g++ CXXFLAGS += -c -Wall $(shell pkg-config --cflags /home/billa/Downloads/opencv-3.4.2/platforms/linux/riscv_build/install/lib/pkgconfig/opencv.pc) LDFLAGS += $(shell pkg-config --libs --static /home/billa/Downloads/opencv-3.4.2/platforms/linux/riscv_build/install/lib/pkgconfig/opencv.pc) all: example example: example.o; $(CXX) $< -o $@ $(LDFLAGS) %.o: %.cpp; $(CXX) $< -o $@ $(CXXFLAGS) clean: ; rm -f example.o example

Error: -

BusyBox v1.26.2 (2018-06-27 09:49:37 IST) built-in shell (ash)

/opencv/example

/opencv/example Built with OpenCV 3.4.2 VIDEOIO ERROR: V4L: can't open camera by index 0 No capture

My Sample c++ Program:

include "opencv2/core.hpp"

include "opencv2/imgproc.hpp"

include "opencv2/highgui.hpp"

include "opencv2/videoio.hpp"

include <iostream>

include <fstream>

using namespace cv; using namespace std;

void drawText(Mat & image);

int main() { cout << "Built with OpenCV " << CV_VERSION << endl; Mat image; VideoCapture capture; capture.open(0); if(capture.isOpened()) { cout << "Capture is opened" << endl; for(;;) { capture >> image; if(image.empty()) break; drawText(image); imshow("Sample", image); if(waitKey(10) >= 0) break; } } else { cout << "No capture" << endl; image = Mat::zeros(480, 640, CV_8UC1); drawText(image); //cout << image<<endl; imshow("sample",="" image);<="" p="">

FileStorage fs("myfile.txt",FileStorage::WRITE); fs << "mat1" << image;

return 0;

} }

void drawText(Mat & image) { putText(image, "Hello Welcome to RISCV OpenCV", Point(20, 50), FONT_HERSHEY_COMPLEX, 1, // font face and scale Scalar(255, 255, 255), // white 1, LINE_AA); // line thickness and type }

I have cross compiled sample c++ program for riscv,and i am trying to executing in riscv-linux.Here riscv-linux there is now facility to display image as a result,so i am generating a result image matrix as a Text file and i am planing to see result in X86 architecture.but i am getting error before generating text file.

Makefile:-

CXX =riscv64-unknown-linux-gnu-g++
CXXFLAGS += -c -Wall $(shell pkg-config --cflags /home/billa/Downloads/opencv-3.4.2/platforms/linux/riscv_build/install/lib/pkgconfig/opencv.pc)
LDFLAGS += $(shell pkg-config --libs --static /home/billa/Downloads/opencv-3.4.2/platforms/linux/riscv_build/install/lib/pkgconfig/opencv.pc)
all: example
example: example.o; $(CXX) $< -o $@ $(LDFLAGS)
%.o: %.cpp; $(CXX) $< -o $@ $(CXXFLAGS)
clean: ; rm -f example.o example
example

BusyBox v1.26.2 (2018-06-27 09:49:37 IST) built-in shell (ash)
 
/opencv/example
 
(ash)
# /opencv/example
/opencv/example
Built with OpenCV 3.4.2
VIDEOIO ERROR: V4L: can't open camera by index 0
No capturecapture

#include "opencv2/core.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/videoio.hpp"
#include <iostream>
#include <fstream>

using namespace cv;
using namespace std;
 
std;
void drawText(Mat & image);
 
image);
int main()
{
cout << "Built with OpenCV " << CV_VERSION << endl;
Mat image;
VideoCapture capture;
capture.open(0);
if(capture.isOpened())
{
cout << "Capture is opened" << endl;
for(;;)
{
capture >> image;
if(image.empty())
break;
drawText(image);
imshow("Sample", image);
if(waitKey(10) >= 0)
break;
}
}
else
{
cout << "No capture" << endl;
image = Mat::zeros(480, 640, CV_8UC1);
drawText(image);
//cout << image<<endl; imshow("sample",="" image);<="" p="">
image<<endl;
//imshow("Sample", image);
FileStorage fs("myfile.txt",FileStorage::WRITE);
fs << "mat1" << image;
 
image;
return 0;
 
}
}
 
}
void drawText(Mat & image)
{
putText(image, "Hello Welcome to RISCV OpenCV",
Point(20, 50),
FONT_HERSHEY_COMPLEX, 1, // font face and scale
Scalar(255, 255, 255), // white
1, LINE_AA); // line thickness and type
}}