An accurate optical flow estimation of PIV using fluid velocity decomposition

2021 ◽  
Vol 62 (4) ◽  
Author(s):  
Jin Lu ◽  
Hua Yang ◽  
Qinghu Zhang ◽  
Zhouping Yin
Keyword(s):  
Optical Flow ◽  
Fluid Velocity ◽  
Flow Estimation ◽  
Optical Flow Estimation ◽  
Velocity Decomposition

scholarly journals Every Frame Counts: Joint Learning of Video Segmentation and Optical Flow

2020 ◽  
Vol 34 (07) ◽  
pp. 10713-10720
Author(s):  
Mingyu Ding ◽  
Zhe Wang ◽  
Bolei Zhou ◽  
Jianping Shi ◽  
Zhiwu Lu ◽  
...  
Keyword(s):  
Optical Flow ◽  
Video Segmentation ◽  
Video Clip ◽  
Semantic Segmentation ◽  
Temporal Consistency ◽  
Flow Estimation ◽  
Optical Flow Estimation ◽  
Optical Flows ◽  
Benchmark Datasets ◽  
Spatio Temporal

A major challenge for video semantic segmentation is the lack of labeled data. In most benchmark datasets, only one frame of a video clip is annotated, which makes most supervised methods fail to utilize information from the rest of the frames. To exploit the spatio-temporal information in videos, many previous works use pre-computed optical flows, which encode the temporal consistency to improve the video segmentation. However, the video segmentation and optical flow estimation are still considered as two separate tasks. In this paper, we propose a novel framework for joint video semantic segmentation and optical flow estimation. Semantic segmentation brings semantic information to handle occlusion for more robust optical flow estimation, while the non-occluded optical flow provides accurate pixel-level temporal correspondences to guarantee the temporal consistency of the segmentation. Moreover, our framework is able to utilize both labeled and unlabeled frames in the video through joint training, while no additional calculation is required in inference. Extensive experiments show that the proposed model makes the video semantic segmentation and optical flow estimation benefit from each other and outperforms existing methods under the same settings in both tasks.

A neural-based method for optical flow estimation using phase correlation

2018 ◽  
Vol 8 (5) ◽  
pp. 526
Author(s):  
Khalid Ghoul ◽  
Mohamed Berkane ◽  
Mohamed Chaouki Batouche
Keyword(s):  
Optical Flow ◽  
Phase Correlation ◽  
Flow Estimation ◽  
Optical Flow Estimation
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