The employment of convolutional neural networks has led to significant performance improvement on the task of object detection. However, when applying existing detectors to continuous frames in a video, we often encounter momentary miss-detection of objects, that is, objects are undetected exceptionally at a few frames, although they are correctly detected at all other frames. In this paper, we analyze the mechanism of how such miss-detection occurs. For the most popular class of detectors that are based on anchor boxes, we show the followings: i) besides apparent causes such as motion blur, occlusions, background clutters, etc., the majority of remaining miss-detection can be explained by an improper behavior of the detectors at boundaries of the anchor boxes; and ii) this can be rectified by improving the way of choosing positive samples from candidate anchor boxes when training the detectors.
@article{arxiv.1910.09212,
title = {Analysis and a Solution of Momentarily Missed Detection for Anchor-based Object Detectors},
author = {Yusuke Hosoya and Masanori Suganuma and Takayuki Okatani},
journal= {arXiv preprint arXiv:1910.09212},
year = {2020}
}