Global motion estimation in model-based image coding by tracking three-dimensional contour feature points

1998 ◽  
Vol 8 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Soo-Chang Pei ◽  
Ching-Wen Ko ◽  
Ming-Shing Su
Keyword(s):  
Motion Estimation ◽  
Image Coding ◽  
Three Dimensional ◽  
Feature Points ◽  
Global Motion ◽  
Global Motion Estimation ◽  
Model Based ◽  
Contour Feature

scholarly journals Robust Global Motion Estimation for Video Stabilization Based on Improved K-Means Clustering and Superpixel

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2505
Author(s):  
Rouwan Wu ◽  
Zhiyong Xu ◽  
Jianlin Zhang ◽  
Lihong Zhang
Keyword(s):  
Motion Estimation ◽  
Motion Vector ◽  
Similarity Index ◽  
Video Frame ◽  
Cluster Center ◽  
Video Stabilization ◽  
Feature Points ◽  
Global Motion ◽  
Simple Method ◽  
Global Motion Estimation

Obtaining accurate global motion is a crucial step for video stabilization. This paper proposes a robust and simple method to implement global motion estimation. We don’t extend the framework of 2D video stabilization but add a “plug and play” module to motion estimation based on feature points. Firstly, simple linear iterative clustering (SLIC) pre-segmentation is used to obtain superpixels of the video frame, clustering is performed according to the superpixel centroid motion vector and cluster center with large value is eliminated. Secondly, in order to obtain accurate global motion estimation, an improved K-means clustering is proposed. We match the feature points of the remaining superpixels between two adjacent frames, establish a feature points’ motion vector space, and use improved K-means clustering for clustering. Finally, the richest cluster is being retained, and the global motion is obtained by homography transformation. Our proposed method has been verified on different types of videos and has efficient performance than traditional approaches. The stabilization video has an average improvement of 0.24 in the structural similarity index than the original video and 0.1 higher than the traditional method.

Video Stabilization Algorithm Based on Background Feature Points Matching

2015 ◽  
Vol 738-739 ◽  
pp. 690-693
Author(s):  
Shu Jiao Ji ◽  
Ming Zhu ◽  
Yan Min Lei
Keyword(s):  
Motion Estimation ◽  
Video Quality ◽  
Video Stabilization ◽  
Feature Points ◽  
Global Motion ◽  
Global Motion Estimation ◽  
Affine Transform ◽  
Feature Points Matching ◽  
Inter Frame ◽  
Background Feature

Global motion estimation between two successive frames is important to the process of video stabilization. In the proposed approach, the estimation of global motion was based on the background feature points (BFPS). First, feature points (FPS) were collected from the input video by FAST operator; second, feature point’s descriptor and matching were based on FREAK operator.The M-SAC is used to classify the BFPS. Last, the six parameters of the affine transform model to calculate the interframe motion estimation vector. The experiment results show that he proposed method can stabilize inter-frame jitter, in the meanwhile, it improve the video quality effectively.

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