salahuddin_12's profile - activity

I think i was unable to explain my question, but the link which you shared really helped. All i was asking how to write

I think i was unable to explain my question, but the link which you shared really helped. All i was how to write warp_fl

Isn't it possible when we have already calculated flow values by using both next and prev images?

Isn't it possible when we have already calculated flow valued by using both next and prev images?

What i'm trying to do is, I'm trying to regenerate next image from prev image. I thought that there might be some way to

Applying dense optical flow to image I need help in applying dense optical flow to an image. This is how I'm generation

I have been trying to stitch two spherical (fish eye) images together by using opencv. I have tried there sample code: https://raw.githubusercontent.com/ope... but it haven't given me much success (It says that it don't have sufficient features). I want to know exact steps which are required here. Do i need to defish it first? Do i need to remove these black border. I want to create Stereographic or Equirectangular projection from them. Can someone please guide me how this can be done ?

yes i think thats the only option i have with me right now. Thanks for replying.

Actually my cameras are fixed. Im using a 7 rig Gopro.

I'm Quite new with OpenCv. What I'm trying to do is I'm trying to Stitch few images together using stitching_detailed.cpp. Problem which I'm facing is due to lack of feature it is dropping one image out. So for the dropped Image I have to manually calculate the camera angle.

Following are the camera Rotation Matrix:

cam1.jpg
[0.15191515, 0.032542922, 0.9878577;
-0.016061526, 0.99940717, -0.030453419;
-0.98826301, -0.011240158, 0.15234777]

cam3.jpg
[0.7509135, 0.0035269554, -0.66039109;
-0.021461653, 0.99958795, -0.019064991;
0.66005164, 0.028489247, 0.75067973]

cam4.jpg
[1, 4.1909516e-09, 0;
 7.9162419e-09, 1, 0;
 0, 3.7252903e-09, 0.99999994]

cam5.jpg
[0.75491911, 0.024605259, 0.65535617;
-0.01778595, 0.99969661, -0.017045438;
-0.65557659, 0.0012118071, 0.75512767]

As you can see Rotation Matrix for Cam 2 is missing. Can anyone help me in calculation Rotation matrix for Cam2

I will try to improve calibration. Thanks for helping me out

origional undistorted Can you check again

I was acceding my comment limit so i had to divide it in two. If you see I'm loosing some of the image in undistorted version. Any idea how to avoid it.

undistorted

origional

It worked like a charm. Can you write it as an answer so then i can mark it. One more thing. After applying the distortion I'm loosing some of the image (Is there a way to avoid that).

I used "opencv/samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp" script.

Following is the error which I'm getting

'error: (-215) K.size() == Size(3, 3) && (D.empty() || D.total() == 4) in function initUndistortRectifyMap'

I'm trying to do fish an image by providing "camera_matrix" and "distortion_coefficients" to cv::fisheye::undistortImage. problem is I'm getting Assertion error. Reason is the distortion coefficients which i'm getting through camera calibration are 5x1

<distortion_coefficients type_id="opencv-matrix"> <rows>5</rows> <cols>1</cols> <dt>d</dt> <data> -2.0834245161331000e-01 5.8179563841609050e-02 0. 0. -8.0440183287724919e-03</data></distortion_coefficients>

but undistortImage method accepts 4X1 distortion matrix. Any idea whats the way around to this problem

Thanks .. I will check it

Thanks for the information. I will look into it. :)

I'm trying to create a 3d sphere with by using opencv sample code "stitching_detailed.cpp". Pictures have been taken by 7 camera (5 in ring and 1 for top and 1 for bottom). Any idea which prams i can use to stitch top and bottom?

Following are top and bottom.

Here are result i achieved without bottom and top image.

I'm quite new to opencv so pardon me if I'm asking a question which is already been answered. I'm trying to find a way do defish an fisheye image (Taken from a gopro). Can someone guide me how i can achieve that, and are intrinsic matrices values required for this purpose? If they are required can i find them for gopro online or do i have to some how calculate them.