DocumentCode :
2828060
Title :
Filter based alpha matting for depth image based rendering
Author :
Kodera, Naoki ; Fukushima, Norishige ; Ishibashi, Yutaka
Author_Institution :
Grad. Sch. of Eng., Nagoya Inst. of Technol., Nagoya, Japan
fYear :
2013
fDate :
17-20 Nov. 2013
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, we propose a free viewpoint image rendering method combined with filter based alpha matting for improving the image quality of image boundaries. When we synthesize a free viewpoint image, blur around object boundaries in an input image spills foreground/background color in the synthesized image. To generate smooth boundaries, alpha matting is a solution. In our method based on filtering, we make a boundary map from input images and depth maps, and then feather the map by using guided filter. In addition, we extend view synthesis method to deal the alpha channel. Experiment results show that the proposed method synthesizes 0.4 dB higher quality images than the conventional method without the matting. Also the proposed method synthesizes 0.2 dB higher quality images than the conventional method of robust matting. In addition, the computational cost of the proposed method is 100x faster than the conventional matting.
Keywords :
filtering theory; image colour analysis; image restoration; background color; depth image based rendering; filter based alpha matting; foreground color; free viewpoint image rendering method; guided filter; image boundaries; image quality; input image spills; object boundaries; view synthesis method; Image color analysis; Image reconstruction; Kernel; PSNR; Rendering (computer graphics); Robustness; Strips; alpha matting; depth image based rendering; depth map refinement; view synthesis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Visual Communications and Image Processing (VCIP), 2013
Conference_Location :
Kuching
Print_ISBN :
978-1-4799-0288-0
Type :
conf
DOI :
10.1109/VCIP.2013.6706412
Filename :
6706412
Link To Document :
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