I was testing importing stereo MHA data using the old Calibration app (offline) vs LLH in UE 5.7 using a non-standard calibration board (in this case, the smaller board used by FG, 9x12 6mm).
Calibration results were similar (mse of 0.113 offline vs 0.125 from UE 5.7) which are extremely good, but the depth map reconstruction was way different.
Now, in UE 5.7, the calibration process appears to be 2 step: There’s a “pre-select” frames button and “run calibration” button. By the way they are placed, I assume you run the pre-select first then run the calibration.
I’ve done this before with the standard board, with no issues, but the pre-selection process would not select any frames with the non-standard board. (and I did make sure the numbers were correct in config)
However, it does seem that the first step is optional to some extent, as I could still run the calibration without that (resulting in the calibration results seen below)
So my questions are: Why can’t the “pre-select” frames not discover any with this non-standard board, what is the purpose of pre-selecting in the first place and why are the depth map results so different with similar calibration results?
I know it is preview and all, and not quite finished, but I found it interesting.