Profile for Insta360 Ace Pro?

1

Would a profile exist for the Ace Pro?

2

You can take a calibration video like https://download.actionstitch.com/calibration_sample.mp4 and send the video to me.

For the checkerboard, you can pick one from Calibration Checkerboard Collection | Mark Hedley Jones and show it on a big screen monitor or TV.

3

Calibration video link below:

4

Try to save the following to a json file and then click the ‘load from file’ button when selecting the camera model:

{
  "distortion_coefficients": [0.02112606897801234,0.027886087199325404,0.0017451854473992216,-0.00022830866816450434,-0.0057879860366943465,0.05614027775698095,0.02952486665541023,-0.006170962586071728,0.0,0.0,0.0,0.0,0.0,0.0
],
  "intrinsic_matrix": [963.6572908622179,0.0,1868.9684452421743,0.0,969.0182276166269,1016.1201702523331,0.0,0.0,1.0
]
}

However, the calibration error appears to be somewhat high, possibly due to the checkerboard paper not being completely flat. If it does not give you good stitching, taping down the paper and ensuring it is completely flat. Or show the checkerboard on a large screen as I suggested.

5

I tried again using the laptop screen. Hopefully this one is better:

6

This one is definitely better:

{
  "distortion_coefficients": [-0.1647360848041398,2.6906346963272587,0.004584968225237256,-0.0035081324045695642,101.66987257348822,0.24211761993434164,0.5859486126124166,113.99014878968399,0.0,0.0,0.0,0.0,0.0,0.0
],
  "intrinsic_matrix": [3856.1313022872505,0.0,1938.799429270209,0.0,3856.3473479137483,1050.6054725078939,0.0,0.0,1.0
]
}
7

Thanks for the profile.

I finally had the chance to record something but am wondering what I am doing wrong to cause the double image in the picture? It seems to be right along the stitch line.

Clipboard_10-28-2024_01
Clipboard_10-28-2024_011123×928 139 KB

8

That is usually caused by a stitching issue. Can you share with me the raw videos from the cameras? You can just PM me the links.

9

For those interested, this is the final calibration data for Insta360 Ace Pro that can make good stitching:

{
  "distortion_coefficients": [2.5727545103253506,5.2989996334944465,0.0006351176415961906,-0.0016746310632084012,0.5367350766479837,2.8366139058253665,5.992898313631504,1.8369571395352544,0.0,0.0,0.0,0.0,0.0,0.0
],
  "intrinsic_matrix": [1877.2108278924832,0.0,2017.6687661598814,0.0,1840.7301313663204,1526.2751345045565,0.0,0.0,1.0
]
}

You videos must be taken in FreeFrame mode.

10

I’ve finally taken a video of a full size game. What is the most common reason for the field being on the angle? I also notice that the stitch hasn’t worked quite right but is this because of the angle issue?

11

I’m not sure what you meant by “the field being on the angle”, but obviously the stitching was quite off. Make sure left video and right video match well within the overlapped area when in the stitching dialog. Select different frames with players scattered around to see which one gives the best results. If none gives a good result, click the ‘manual stitch’ button to select stitch points manually. If you still can’t get good results, share the raw videos with me and I’ll take a look.

12

I’ll have a look at the cameras and stitching again.

I just thought that the pitch looked like it had an acute angle instead of a line for the sideline.

Could that be a result of the cameras not being angled down enough?