Bone length coherence represents how well the initial inter-articular length is maintained throughout the sequence. Near the maximum value, similar to the initial bone length, near the minimum value, different from the initial bone length. If bone length consistency is measured low, people may question the integrity of the data. 

To find the local minima, we identify the ranges where the values reach a low point within the dataset. A local minimum is a point where the value is lower than its neighboring values. This indicates periods of less activity or reduced movement. The detection is based on a threshold percentage (e.g., 20% above the minimum value) to focus on the most significant dips. The output lists the frame ranges where these dips occur and their respective values.