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How to convert openni stream data to cv::gpumat As per stackoverflow openni questionThe data in the openni RGB888Pixel a

How to convert openni stream data to cv::gpumat As per stackoverflow openni questionThe data in the openni RGB888Pixel a

How to convert openni stream data to cv::gpumat As per stackoverflow openni questionThe data in the openni RGB888Pixel a

I need to copy the non zero elements of a gpumat to a new gpumat with corresponding indices. I intend to use thrust iter

I need to copy the non zero elements of a gpumat to a new gpumat with corresponding indices. I intend to use thrust iter

compilation error with opencv/...gpu/gpu-thrust-interop/ code I get compilation error if I try to compile the opencv sam

How to create thrust device_vector from opencv gpumat and vice-versa I need to convert a opencv::gpumat to a thrust::dev

How to create thrust device_vector from opencv gpumat and vice-versa I need to convert a opencv::gpumat to a thrust::dev

How to calibrate two cameras whose field of View is 180 deg apart I have two cameras which are fixed back to back and th

ok. I ll edit it and put it.

I need to find the extrinsics between the two cameras. They dont have fish eye lenses. The cameras are two primesense RG

How to calibrate two cameras whose field of View is 180 deg apart I have two cameras which are fixed back to back and th

opencv 3.3 multicamera calibration: size of pattern I am trying to use the opencv multi camera calibration from http://d

I am using the following code(from simulataneous_minoru3d_opencv_forums) to access video from minoru 3d webcam. However there is observable lag between left and right frame. I have tried increasing frame rate, reducing image size but all are failing. How can I reduce the time lag between the frames? It should be possible as i ahave seen youtube videos captured by minoru which dont seem to have any lag.

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
using namespace cv;
using namespace std;

void Main_GrabFrom2CamWriteMosaic()
{
// SELECT CAM ID FOR YOUR CAMS
int camL = 0, camR = 1;

VideoCapture capL(camL);
VideoCapture capR(camR);

//SET SAME SETTINGS ON BOTH CAM
Size frameSize(320, 240);
double fps = 30;

capL.set(CV_CAP_PROP_FRAME_WIDTH, frameSize.width);
capL.set(CV_CAP_PROP_FRAME_HEIGHT, frameSize.height);
capL.set(CV_CAP_PROP_FPS, fps); //desired  FPS 

capR.set(CV_CAP_PROP_FRAME_WIDTH, frameSize.width);
capR.set(CV_CAP_PROP_FRAME_HEIGHT, frameSize.height);
capR.set(CV_CAP_PROP_FPS, fps); //desired  FPS 

// GRAB ONCE TO GET FRAME INFO (we'll lost this frames)
Mat imgL, imgR;
if (!(capL.read(imgL) && capR.read(imgR))) {
    std::cerr << "Unable to grab from some CAM";
    capL.release(); capR.release();
    return;
}

// ENSURE RIGHT TYPE AND SIZE
frameSize = imgL.size();
// this will hold images from both cams 
Mat frame(Size(2 * frameSize.width, frameSize.height), imgL.type());
// define ROI to compose mosaic
Mat frameL(frame(Rect(0, 0, frameSize.width, frameSize.height)));
Mat frameR(frame(Rect(frameSize.width, 0, frameSize.width, frameSize.height)));
// IN CASE YOU WANT TO SAVE A VIDEO
bool isColor = imgL.type() == CV_8UC3;
CV_Assert(isColor);
double fourcc;

// THE GRAB LOOP
for (;;)
{
    // GRAB THE NEXT FRAME FROM VIDEO CAMERA
    if (! (capL.grab() && capR.grab()) ) {
        std::cerr << "Unable to grab from one or both cameras"; 
        break;
    }
    // ENCODE AND RETURN THE JUST GRABBED FRAME
    // you can't grab into a ROI
    capL.retrieve(imgL);
    capR.retrieve(imgR);
    if (imgL.empty() || imgR.empty()) {
        std::cerr << "Empty frame received from some CAM !";
        break;
    }
    // COMPOSE MOSAIC show and save
    imgL.copyTo(frameL);
    imgR.copyTo(frameR);
    cv::imshow("frame", frame);
    if (cv::waitKey(30) >= 0) break;
}
capL.release();
capR.release();

}

int main() {

Main_GrabFrom2CamWriteMosaic();

return 0;
}