Right Camera Calibration Issues

OpenCV, Python and other image processing questions
Post Reply
atrunyan
Posts: 8
Joined: Fri Oct 22, 2021 4:36 pm

Right Camera Calibration Issues

Post by atrunyan »

I'm using the stereopi set up, and created my own script using opencv for calibration. The chessboard corners are detected very well in the left camera images each time, but the right camera images struggle to correctly identify chessboard corners. Below is the link to my github with the code. I have been using the images in the "pairs_land_calib" folder as well as the script, cv_calibrate_stereo.py

https://github.com/atrunyan/stereopi_URIL.git
Image

stereomaton
Posts: 214
Joined: Tue May 21, 2019 12:33 pm
Location: France

Re: Right Camera Calibration Issues

Post by stereomaton »

I did not test your code, but by reading it rapidly, I noticed an error here:
https://github.com/atrunyan/stereopi_UR ... reo.py#L56
Not read afterwards.
Stereophotographer and hacker
Despite my quite active participation in the forum, I am not in the StereoPi team
StereoPi (v1) Standard Edition + CM3Lite module + a few cameras

atrunyan
Posts: 8
Joined: Fri Oct 22, 2021 4:36 pm

Re: Right Camera Calibration Issues

Post by atrunyan »

Thank you! I actually caught this same error shortly after posting my issue. It is now fixed!

I am still not getting a well-defined disparity map though. My maps are all very noisy, there is no clear shapes even for a basic picture of a box against a blank wall.

User avatar
Realizator
Site Admin
Posts: 875
Joined: Tue Apr 16, 2019 9:23 am
Contact:

Re: Right Camera Calibration Issues

Post by Realizator »

Hi atrunyan,

I've spotted your "cutted" pairs looks swapped, i.e. left image is actually a right image.
Examples:
https://github.com/atrunyan/stereopi_UR ... eft_01.png
https://github.com/atrunyan/stereopi_UR ... ght_01.png

Could you please check this part of your pair-cutting code?

Also I can't realize either you are using a wide-angle camera, or the chess-board is not a plane? ( I guess it's a widfe-angle with specific optics...)
Eugene a.k.a. Realizator

Post Reply