Search Results for author: Lin Xi

Found 5 papers, 3 papers with code

Online Unsupervised Video Object Segmentation via Contrastive Motion Clustering

2 code implementations21 Jun 2023 Lin Xi, Weihai Chen, Xingming Wu, Zhong Liu, Zhengguo Li

Online unsupervised video object segmentation (UVOS) uses the previous frames as its input to automatically separate the primary object(s) from a streaming video without using any further manual annotation.

Clustering Contrastive Learning +6

Image Enhancement for Remote Photoplethysmography in a Low-Light Environment

1 code implementation16 Mar 2023 Lin Xi, Weihai Chen, Changchen Zhao, Xingming Wu, Jianhua Wang

Using collected dataset, we found 1) face detection algorithm cannot detect faces in video captured in low light conditions; 2) A decrease in the amplitude of the pulsatile signal will lead to the noise signal to be in the dominant position; and 3) the chrominance-based method suffers from the limitation in the assumption about skin-tone will not hold, and Green and ICA method receive less influence than POS in dark illuminance environment.

Face Detection Heart rate estimation +2

Weighted combination and singular spectrum analysis based remote photoplethysmography pulse extraction in low-light environments

no code implementations Medical Engineering & Physics 2022 Lin Xi, Xingming Wu, Weihai Chen, Jianhua Wang, Changchen Zhao

The test results verify that the proposed method has stronger robustness to low illumination than state-of-the-art methods, effectively improving the signal-to-noise ratio and heart rate estimation precision.

Heart rate estimation

Implicit Motion-Compensated Network for Unsupervised Video Object Segmentation

1 code implementation6 Apr 2022 Lin Xi, Weihai Chen, Xingming Wu, Zhong Liu, Zhengguo Li

Unsupervised video object segmentation (UVOS) aims at automatically separating the primary foreground object(s) from the background in a video sequence.

Motion Compensation Semantic Segmentation +2

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