String
BaslerCamera::capture(const String& outdir) {
String outfile;
// Let the camera acquire one single image ( Acquisiton mode equals
// SingleFrame! )
_cam->AcquisitionStart.Execute();
// Wait for the grabbed image with a timeout of 3 seconds
if (_streamGrabber->GetWaitObject().Wait(3000)) {
// Get the grab result from the grabber's result queue
GrabResult res;
_streamGrabber->RetrieveResult(res);
if (res.Succeeded()) {
// Get the pointer to the image buffer
const uint8_t *pImageBuffer = (uint8_t *) res.Buffer();
// Save the buffer as a JPEG-compressed image in a unique filename inside outdir and return its name
outfile = saveJpegImage(outdir, pImageBuffer, res.GetSizeX(), res.GetSizeY());
// Prepare for next frame
_streamGrabber->QueueBuffer(res.Handle(), res.Context());
}
else
throw RuntimeError("An error occurred when trying to capture the image from camera " + _name);
}
else {
// Get the pending buffer back (You are not allowed to deregister
// buffers when they are still queued)
_streamGrabber->CancelGrab();
// Get all buffers back
for (GrabResult r; _streamGrabber->RetrieveResult(r););
throw RuntimeError("Acquisition from camera " + this->getName() + " timed out!");
}
return outfile;
}
