Improving Sampling Criterion for Alpha Matting

2013 ◽  
Author(s):  
Jun Cheng ◽  
Zhenjiang Miao
Keyword(s):  
Alpha Matting

Motion Segmentation and Matting by Graph Cut

2012 ◽  
pp. 95-117
Author(s):  
Jiangjian Xiao
Keyword(s):  
Video Sequence ◽  
Graph Cut ◽  
The Other ◽  
Robust Approach ◽  
Alpha Matting ◽  
Optical Flow Field ◽  
Segmentation Boundary ◽  
Clustering Approach ◽  
Multiple Frames ◽  
Layer Segmentation

Given a video sequence, obtaining accurate layer segmentation and alpha matting is very important for video representation, analysis, compression, and synthesis. By assuming that a scene can be approximately described by multiple planar or surface regions, this chapter describes a robust approach to automatically detect the region clusters and perform accurate layer segmentation for the scene. The approach starts from optical flow field or small corresponding seed regions and applies a clustering approach to estimate the layer number and support regions. Then, it uses graph cut algorithm combined with a general occlusion constraint over multiple frames to solve pixel assignment over multiple frames to obtain more accurate segmentation boundary and identify the occluded pixels. For the non-textured ambiguous regions, an alpha matting technique is further used to refine the segmentation and resolve the ambiguities by determining proper alpha values for the foreground and background, respectively. Based on the alpha mattes, the foreground object can be transferred into the other video sequence to generate a virtual video. The author’s experiments show that the proposed approach is effective and robust for both the challenging real and synthetic sequences.

Parallelisation of practical shared sampling alpha matting with OpenMP

2020 ◽  
Vol 21 (1) ◽  
pp. 105
Author(s):  
Kuan Ching Li ◽  
Huimin Lu ◽  
Tien Hsiung Weng ◽  
Meng Yen Hsieh ◽  
Chi Ching Chiu
Keyword(s):  
Alpha Matting

An alpha matting algorithm based on collaborative swarm optimization for high-resolution images

2020 ◽  
Vol 50 (3) ◽  
pp. 424-437
Author(s):  
Yihui LIANG ◽  
Zhaoquan CAI ◽  
Han HUANG ◽  
Qiuxia WU ◽  
Fujian FENG ◽  
...  
Keyword(s):  
High Resolution ◽  
Swarm Optimization ◽  
Alpha Matting ◽  
High Resolution Images

Improving alpha matting and motion blurred foreground estimation

2013 ◽  
Author(s):  
Rolf Kohler ◽  
Michael Hirsch ◽  
Bernhard Scholkopf ◽  
Stefan Harmeling
Keyword(s):  
Alpha Matting

Efficient quality enhancement of disparity maps based on alpha matting

2014 ◽  
Author(s):  
Nicole Brosch ◽  
Matej Nezveda ◽  
Margrit Gelautz ◽  
Florian Seitner
Keyword(s):  
Quality Enhancement ◽  
Alpha Matting ◽  
Disparity Maps
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