CSL
Circular Smooth Label
**Circular Smooth Label** (CSL) is a classification-based rotation detection technique for arbitrary-oriented object detection. It is used for circularly distributed angle classification and addresses the periodicity of the angle and increases the error tolerance to adjacent angles.
On the Arbitrary-Oriented Object Detection: Classification based Approaches Revisited
https://paperswithcode.com/paper/arbitrary-oriented-object-detection-with
On the Arbitrary-Oriented Object Detection: Classification based Approaches Revisited