SampleCvTestbed.cpp

This is an example of how to use the CvTestbed and Capture classes in order to make quick OpenCV prototype applications.

#include "CvTestbed.h"
#include "Shared.h"
using namespace alvar;
using namespace std;
void videocallback(IplImage *image)
{
static IplImage *img_gray=NULL;
assert(image);
if (img_gray == NULL) {
// Following image is toggled visible using key '0'
img_gray = CvTestbed::Instance().CreateImageWithProto("Grayscale", image, 0, 1);
}
if (image->nChannels > 1) {
cvCvtColor(image, img_gray, CV_RGB2GRAY);
} else {
cvCopy(image, img_gray);
}
// TODO: Do your image operations
}
int main(int argc, char *argv[])
{
try {
// Output usage message
std::string filename(argv[0]);
filename = filename.substr(filename.find_last_of('\\') + 1);
std::cout << "SampleCvTestbed" << std::endl;
std::cout << "===============" << std::endl;
std::cout << std::endl;
std::cout << "Description:" << std::endl;
std::cout << " This is an example of how to use the 'CvTestbed', 'CaptureFactory' and" << std::endl;
std::cout << " 'Capture' classes. The 'CaptureFactory' can create 'Capture' objects" << std::endl;
std::cout << " from many different backends (see SampleCvTestbed.cpp). You can also" << std::endl;
std::cout << " show/hide the 1st ten images created using 'CvTestbed' using the number" << std::endl;
std::cout << " keys. In this example you can use key '0' to show/hide a grayscale" << std::endl;
std::cout << " version of the captured image." << std::endl;
std::cout << std::endl;
std::cout << "Usage:" << std::endl;
std::cout << " " << filename << " [device]" << std::endl;
std::cout << std::endl;
std::cout << " device integer selecting device from enumeration list (default 0)" << std::endl;
std::cout << " highgui capture devices are prefered" << std::endl;
std::cout << std::endl;
std::cout << "Keyboard Shortcuts:" << std::endl;
std::cout << " 0: show/hide grayscale image" << std::endl;
std::cout << " q: quit" << std::endl;
std::cout << std::endl;
// Initialise CvTestbed
// Enumerate possible capture plugins
if (plugins.size() < 1) {
std::cout << "Could not find any capture plugins." << std::endl;
return 0;
}
// Display capture plugins
std::cout << "Available Plugins: ";
std::cout << std::endl;
// Enumerate possible capture devices
if (devices.size() < 1) {
std::cout << "Could not find any capture devices." << std::endl;
return 0;
}
// Check command line argument for which device to use
int selectedDevice = defaultDevice(devices);
if (argc > 1) {
selectedDevice = atoi(argv[1]);
}
if (selectedDevice >= (int)devices.size()) {
selectedDevice = defaultDevice(devices);
}
// Display capture devices
std::cout << "Enumerated Capture Devices:" << std::endl;
outputEnumeratedDevices(devices, selectedDevice);
std::cout << std::endl;
// Create capture object from camera
Capture *cap = CaptureFactory::instance()->createCapture(devices[selectedDevice]);
std::string uniqueName = devices[selectedDevice].uniqueName();
// Handle capture lifecycle and start video capture
// Note that loadSettings/saveSettings are not supported by all plugins
if (cap) {
std::stringstream settingsFilename;
settingsFilename << "camera_settings_" << uniqueName << ".xml";
cap->start();
cap->setResolution(640, 480);
if (cap->loadSettings(settingsFilename.str())) {
std::cout << "Loading settings: " << settingsFilename.str() << std::endl;
}
std::stringstream title;
title << "SampleCvTestbed (" << cap->captureDevice().captureType() << ")";
CvTestbed::Instance().StartVideo(cap, title.str().c_str());
if (cap->saveSettings(settingsFilename.str())) {
std::cout << "Saving settings: " << settingsFilename.str() << std::endl;
}
cap->stop();
delete cap;
}
else if (CvTestbed::Instance().StartVideo(0, argv[0])) {
}
else {
std::cout << "Could not initialize the selected capture backend." << std::endl;
}
return 0;
}
catch (const std::exception &e) {
std::cout << "Exception: " << e.what() << endl;
}
catch (...) {
std::cout << "Exception: unknown" << std::endl;
}
}


ar_track_alvar
Author(s): Scott Niekum
autogenerated on Mon Jun 10 2019 12:47:03