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Ze-Jin Sun

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Preprint Oct 2026

CodecMotion-OAD: Efficient Online Action Detection with Compressed-Domain Motion

Online action detection (OAD) identifies ongoing actions in streaming videos. Many existing OAD systems combine RGB appearance with optical flow, but dense-flow extraction remains a major computational bottleneck. Codec motion vectors (MVs) are available during decoding, avoiding a separate optical-flow computation. On...

Ze-Jin Sun, Nai-Chuan Zheng, Hai-Lun Xia et al. · 0 citations

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