I was in the middle of a camera analysis, when the progress bar stopped. Looking in a shell I get: failed to compute a step eigen failure unable to perform dense cholesky factorization
Anyone know what the hell it means?
The pipeline tried to compute an optimization step.
To do that, it needed to solve a linear system using Cholesky.
Cholesky requires a positive‑definite matrix.
Eigen detected that the matrix wasn’t positive‑definite and refused to continue.
The optimizer then aborted the iteration.
This kind of failure is typically caused by weak camera geometry — for example, very little translation, strong rotation, and many tracked points lying on or near a single plane. Under those conditions, the system becomes under‑constrained and the Hessian loses positive definiteness.
Is your shot an aerial pan from a drone?
It’s a QT of a crane shot, I was purely checking our tracking for bidding puropses.
If it’s a crane shot with little to no 3 axis rotation (probably 1 axis rotation) you may make more progress with a planar track?
Cholesky and Eigen walk into a bar. Cholesky asks for a positive matrix, bartender gives him a vector, Eigen gets up and leaves…
that’s what happens when you bring a vector to a Cholesky fight
Eigen failure? You’ve just gotta install a Tanhauser gate.
I feel like I just walked into https://old.reddit.com/r/VXJunkies/
-Ted