benwade's profile - activity

I want to stabilize an uncompressed image sequence, can I use videostab module to do this without convert the sequence to video? or there are other ways to stabilize image sequence?

When I use ocl module on Intel hd graphics 4000 (select manually), I got an error message

OpenCV Error: Unknown error code -220 (CL_INVALID_MEM_OBJECT) in cv::ocl::openCL ExecuteKernel, file ......\src\modules\ocl\src\cl_operations.cpp, line 408

but the same code works on Nvidia GPU (auto selection), please help if anyone have idea~

After execute sample code "stereo_calib", it will show rectified images with some green lines, in addition I can get ROI rectangle of each view, but the rectangle size of each view was not equal, so I crop both images to make them the same size, but there's a problem, how do I determine the new principle point of each view? or the principle point still remain the same?

Hi, everyone, I want to know is it possible to get image sequence like this?

Frame0 (exposure A) -> Frame1 (exposure B) -> Frame2 (exposure A) -> Frame3 (exposure B)

As following was the way I tried, I expected that the “exposure 0” window showing the loner exposure image, and “exposure 1” showing the shorter one, but the result was both windows blink at the same time.

VideoCapture vc(0);

Mat src;

while( true )
{
    vc.set(CV_CAP_PROP_EXPOSURE, 0);
    vc >> src;
    imshow("exposure 0", src);

    vc.set(CV_CAP_PROP_EXPOSURE, -2);
    vc >> src;
    imshow("exposure 1", src);

    waitKey(1);
}

I guess there are some sync problem, because longer exposure makes longer response time, is there any solution?