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@kevinhughes27
Last active January 24, 2024 19:39
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A simple program showing how to capture from a Point Grey Research Camera and display the image using OpenCV
#include "FlyCapture2.h"
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace FlyCapture2;
int main()
{
Error error;
Camera camera;
CameraInfo camInfo;
// Connect the camera
error = camera.Connect( 0 );
if ( error != PGRERROR_OK )
{
std::cout << "Failed to connect to camera" << std::endl;
return false;
}
// Get the camera info and print it out
error = camera.GetCameraInfo( &camInfo );
if ( error != PGRERROR_OK )
{
std::cout << "Failed to get camera info from camera" << std::endl;
return false;
}
std::cout << camInfo.vendorName << " "
<< camInfo.modelName << " "
<< camInfo.serialNumber << std::endl;
error = camera.StartCapture();
if ( error == PGRERROR_ISOCH_BANDWIDTH_EXCEEDED )
{
std::cout << "Bandwidth exceeded" << std::endl;
return false;
}
else if ( error != PGRERROR_OK )
{
std::cout << "Failed to start image capture" << std::endl;
return false;
}
// capture loop
char key = 0;
while(key != 'q')
{
// Get the image
Image rawImage;
Error error = camera.RetrieveBuffer( &rawImage );
if ( error != PGRERROR_OK )
{
std::cout << "capture error" << std::endl;
continue;
}
// convert to rgb
Image rgbImage;
rawImage.Convert( FlyCapture2::PIXEL_FORMAT_BGR, &rgbImage );
// convert to OpenCV Mat
unsigned int rowBytes = (double)rgbImage.GetReceivedDataSize()/(double)rgbImage.GetRows();
cv::Mat image = cv::Mat(rgbImage.GetRows(), rgbImage.GetCols(), CV_8UC3, rgbImage.GetData(),rowBytes);
cv::imshow("image", image);
key = cv::waitKey(30);
}
error = camera.StopCapture();
if ( error != PGRERROR_OK )
{
// This may fail when the camera was removed, so don't show
// an error message
}
camera.Disconnect();
return 0;
}
@burakkurtt
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hey vandanv,
try: g++ -o balltrack balltrack.cpp pkg-config opencv --cflags --libs -L ../flycapture.2.9.3.43_armhf/lib -lflycapture
it is worked for me

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ghost commented Dec 7, 2016

I get a segmentaion fault when calling

camera.StartCapture();

Does anyone know this issue?

Update:
this helped:

sudo sh -c 'echo 1000 > /sys/module/usbcore/parameters/usbfs_memory_mb'

@ashnarayan13
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How do I run this file? I tried adding the package to CMakeLists but I get the same errors as @vandanv. I tried the g++ option, i get g++: error: pkg-config: No such file or directory
Thanks!

@BhanuKiranChaluvadi
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BhanuKiranChaluvadi commented Jul 19, 2017

Thank you for sharing the code. It took no time to interface, just like a plug and play.

@arteagac
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arteagac commented Apr 8, 2018

@ashnarayan13 to run the file you need to make sure that you include headers and libs for flycapture and opencv. You can use for example:

g++ -std=c++11 mycppfile.cpp -I/usr/include/flycapture -lflycapture `pkg-config --libs --cflags opencv` -o mycppfile

Also, make sure FlyCaptureSDK is properly installed.

@anilyuce
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Thanks for the code Kevin. Do you (or anyone else) by any chance have any experience with the SetUserBuffers function from FlyCapture2? The documentation is quite scarce and I was wondering if the image.convert operation also uses the same buffer for the rgbimage in this case.

@vgenten
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vgenten commented Jul 27, 2018

My program gets stuck in line 53 on "camera.RetrieveBuffer( &rawImage );"
But I don't get any error message . I tried to make a console output immediately after that call, but I don't receive anything.
Do you have an idea what the problem could be?

@vefak
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vefak commented Aug 26, 2020

hi, when run the code, the image that grabbing is in Gray format not RGB? Anyone have same problem?

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