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Background Subtraction for Moving Object Detection in RGBD Data: A Survey
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J. Imaging 2018, 4(6), 78;

Analytics of Deep Neural Network-Based Background Subtraction

Graduate School of Information Science and Electrical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
Author to whom correspondence should be addressed.
Received: 14 May 2018 / Revised: 5 June 2018 / Accepted: 5 June 2018 / Published: 8 June 2018
(This article belongs to the Special Issue Detection of Moving Objects)
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Deep neural network-based (DNN-based) background subtraction has demonstrated excellent performance for moving object detection. The DNN-based background subtraction automatically learns the background features from training images and outperforms conventional background modeling based on handcraft features. However, previous works fail to detail why DNNs work well for change detection. This discussion helps to understand the potential of DNNs in background subtraction and to improve DNNs. In this paper, we observe feature maps in all layers of a DNN used in our investigation directly. The DNN provides feature maps with the same resolution as that of the input image. These feature maps help to analyze DNN behaviors because feature maps and the input image can be simultaneously compared. Furthermore, we analyzed important filters for the detection accuracy by removing specific filters from the trained DNN. From the experiments, we found that the DNN consists of subtraction operations in convolutional layers and thresholding operations in bias layers and scene-specific filters are generated to suppress false positives from dynamic backgrounds. In addition, we discuss the characteristics and issues of the DNN based on our observation. View Full-Text
Keywords: background subtraction; background modeling; convolutional neural network background subtraction; background modeling; convolutional neural network

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Minematsu, T.; Shimada, A.; Uchiyama, H.; Taniguchi, R.-I. Analytics of Deep Neural Network-Based Background Subtraction. J. Imaging 2018, 4, 78.

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