Class Agnostic Recall < Class Aware Recall

[emirhanbayar]

Hi,

The average recall with the maximum number of detections decreases when I set the useCats parameter to 0. I understand why it decreases for maxDets = 1, 10, 100. This is because predictions are sorted separately for each category, and the top maxDets for each category are evaluated.

However, I cannot understand why it decreases when I set maxDets to the total number of detections produced by the detector per frame. Do you have any idea how this might be possible?

Thank you for this great contribution!