ImageBuffer* CanvasSurface::buffer() const
{
if (!m_hasCreatedImageBuffer)
createImageBuffer();
return m_imageBuffer.get();
}
int main (int argc, char** argv)
{
// Open a webcamera
cv::VideoCapture camera(0);
cv::Mat frame;
if(!camera.isOpened()) return -1;
camera.set(CV_CAP_PROP_FRAME_WIDTH, 640);
camera.set(CV_CAP_PROP_FRAME_HEIGHT, 480);
camera >> frame;
// create CPU/GPU shared images - one for the initial and one for the result
cv::Mat sGray(frame.size(),
CV_8U,
createImageBuffer(frame.size().width * frame.size().height));
cv::Mat dGray(frame.size(),
CV_8U,
createImageBuffer(frame.size().width * frame.size().height));
cv::Mat eGray(frame.size(),
CV_8U,
createImageBuffer(frame.size().width * frame.size().height));
cv::cvtColor(frame, dGray, CV_BGR2GRAY);
cv::cvtColor(frame, eGray, CV_BGR2GRAY);
// Create the capture windows
cv::namedWindow("Source");
cv::namedWindow("Greyscale");
cv::namedWindow("Blurred");
cv::namedWindow("Sobel");
// Loop while capturing images
while(1)
{
// Capture the image and store a gray conversion for the gpu
camera >> frame;
cv::cvtColor(frame, sGray, CV_BGR2GRAY);
// Perform the gpu based blur
struct timeval tv;
struct timezone tz;
struct tm *tm;
gettimeofday(&tv, &tz);
tm=localtime(&tv.tv_sec);
printf(" %d:%02d:%02d %d \n", tm->tm_hour, tm->tm_min,
tm->tm_sec, tv.tv_usec);
boxfilter(frame.size().width, frame.size().height, sGray.data, dGray.data, 3, 3);
sobelfilter(frame.size().width, frame.size().height, dGray.data, eGray.data);
gettimeofday(&tv, &tz);
tm=localtime(&tv.tv_sec);
printf(" %d:%02d:%02d %d \n", tm->tm_hour, tm->tm_min,
tm->tm_sec, tv.tv_usec);
// Show the results
cv::imshow("Source", frame);
cv::imshow("Greyscale", sGray);
cv::imshow("Blurred", dGray);
cv::imshow("Sobel", eGray);
}
// Exit
destroyImageBuffer(sGray.data);
destroyImageBuffer(dGray.data);
destroyImageBuffer(eGray.data);
return 0;
}
