janniswi00

Add convergence safeguards to threshold_li with oscillation detection and iteration limit

5

## Description This PR improves the robustness of threshold_li by adding a mechanism to detect and handle threshold oscillation during iteration. Specifically: - A warning is now raised if the...

threshold_li gets stuck in infinite loop due to value oscillation

5

### Description: When applying `skimage.filters.threshold_li` to a specific float32 image, the algorithm enters an infinite loop. The threshold value oscillates between two close values and never converges. This happens in...