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Fix for AP calculation limits 0.0 - 1.0 (#4563) 

This PR brings alignment in AP computation practices with Detectron2 and MMDetection. 

Problem first noted by @yusiyoh in https://github.com/ultralytics/yolov5/issues/4546
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Glenn Jocher 2021-08-27 13:23:29 +02:00 committed by GitHub
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1 changed files with 2 additions and 2 deletions
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4
utils/metrics.py
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@ -91,8 +91,8 @@ def compute_ap(recall, precision):
"""
# Append sentinel values to beginning and end
mrec = np.concatenate(([0.], recall, [recall[-1] + 0.01]))
mpre = np.concatenate(([1.], precision, [0.]))
mrec = np.concatenate(([0.0], recall, [1.0]))
mpre = np.concatenate(([1.0], precision, [0.0]))
# Compute the precision envelope
mpre = np.flip(np.maximum.accumulate(np.flip(mpre)))