46,099 research outputs found
Tracking-by-Trackers with a Distilled and Reinforced Model
Visual object tracking was generally tackled by reasoning independently on fast processing algorithms, accurate online adaptation methods, and fusion of trackers. In this paper, we unify such goals by proposing a novel tracking methodology that takes advantage of other visual trackers, offline and online. A compact student model is trained via the marriage of knowledge distillation and reinforcement learning. The first allows to transfer and compress tracking knowledge of other trackers. The second enables the learning of evaluation measures which are then exploited online. After learning, the student can be ultimately used to build (i) a very fast single-shot tracker, (ii) a tracker with a simple and effective online adaptation mechanism, (iii) a tracker that performs fusion of other trackers. Extensive validation shows that the proposed algorithms compete with real-time state-of-the-art trackers
Reinforced Axial Refinement Network for Monocular 3D Object Detection
Monocular 3D object detection aims to extract the 3D position and properties
of objects from a 2D input image. This is an ill-posed problem with a major
difficulty lying in the information loss by depth-agnostic cameras.
Conventional approaches sample 3D bounding boxes from the space and infer the
relationship between the target object and each of them, however, the
probability of effective samples is relatively small in the 3D space. To
improve the efficiency of sampling, we propose to start with an initial
prediction and refine it gradually towards the ground truth, with only one 3d
parameter changed in each step. This requires designing a policy which gets a
reward after several steps, and thus we adopt reinforcement learning to
optimize it. The proposed framework, Reinforced Axial Refinement Network
(RAR-Net), serves as a post-processing stage which can be freely integrated
into existing monocular 3D detection methods, and improve the performance on
the KITTI dataset with small extra computational costs.Comment: Accepted by ECCV 202
Index to NASA Tech Briefs, 1975
This index contains abstracts and four indexes--subject, personal author, originating Center, and Tech Brief number--for 1975 Tech Briefs
Aerospace Medicine and Biology: A continuing bibliography with indexes, supplement 145
This bibliography lists 301 reports, articles, and other documents introduced into the NASA scientific and technical information system in August 1975
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