OpenCV-mobile with alternate sensors

Duo
1

I am using OpenCV mobile captures with an OV5647 camera sensor. The sensor works when I symlink the correct sensor config and use the camera-test.sh script. However, when I try to use the following OpenCV code, I always get blank frames and an empty jpeg at the end.

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

#include <unistd.h>   // sleep()

int main()
{
    cv::VideoCapture cap;
    cap.set(cv::CAP_PROP_FRAME_WIDTH, 320);
    cap.set(cv::CAP_PROP_FRAME_HEIGHT, 240);
    cap.open(0);

    const int w = cap.get(cv::CAP_PROP_FRAME_WIDTH);
    const int h = cap.get(cv::CAP_PROP_FRAME_HEIGHT);
    fprintf(stderr, "%d x %d\n", w, h);

    cv::Mat bgr;
    for (int i = 0; i < 3; i++)
    {
        cap >> bgr;
        // ignore first frame because of image processor
        if (bgr.empty() && i != 0) {
            fprintf(stderr, "blank frame!\n");
        }

        sleep(1);
    }

    cap.release();


    // write image
    cv::imwrite("out.jpg", bgr);

    return 0;
}

Is there something special that I need to do to get OpenCV to use the correct camera config? It appears it is still trying to use the camera as a GC2083 as shown by the program output:

opencv-mobile MIPI CSI camera with cvi
opencv-mobile HW JPG decoder with cvi
ISP Vipipe(0) Allocate pa(0x96822000) va(0x0x3fd6566000) size(291120)
pfnSnsProbe failed ffffffff
gc2083_standby
1 Like
2

Hi! You finally got it working? I need to take a photo with OV5647 and I don’t know how to do it. Thanks!!

1 Like