Rotate Intra Block Copy for Still Image Coding
Name
zhang_icip_2015.pdf
Size
1.41 MB
Format
Adobe PDF
Checksum (MD5)
25906277076a0c6cd9de4952d1f478f2
Author(s)
Zhang, Zhengdong
Sze, Vivienne
Date Issued
September 2015
Journal
Proceedings of the IEEE International Conference on Image Processing (ICIP)
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Zhang, Zhengdong, and Vivienne Sze. "Rotate Intra Block Copy for Still Image Coding." IEEE International Conference on Image Processing (ICIP) (September 2015).
Version
Author's final manuscript
Abstract
This paper proposes a method called rotate intra block copy, which extends the intra block copy technique by making the block matching process invariant to rotation. HEVC intra prediction plus rotate intra block copy gives an average of 20% reduction in residual energy (i.e. prediction error) compared to HEVC intra prediction plus intra block copy. As the motion vector correlation in rotate intra block copy is different from the intra block copy, a new method of motion vector coding is presented. The impact of angular resolution on residual energy reduction is also evaluated. In a full codec pipeline, this reduction in residual energy translates into a coding gain in BD-rate of 3.4% over HEVC intra prediction plus intra block copy for both screen content and camera-captured gray scale images.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
http://www.icip2015.org/doc/Program-ICIP2015.pdf
