Joint Chroma Downsampling and Upsampling for Screen Content Image

doi:10.1109/TCSVT.2015.2461891

CORC > 北京大学 > 信息科学技术学院

	Joint Chroma Downsampling and Upsampling for Screen Content Image
	Wang, Shiqi ; Gu, Ke ; Ma, Siwei ; Gao, Wen
刊名	IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
	2016
关键词	Chroma component downsampling screen content compression screen content image upsampling RATE-DISTORTION OPTIMIZATION STRUCTURAL SIMILARITY QUALITY ASSESSMENT VIDEO COMPRESSION COMPOUND IMAGES HEVC INTERPOLATION STATISTICS
DOI	10.1109/TCSVT.2015.2461891
英文摘要	Screen content images are originally captured in a full-chroma format. The chroma downsampling, which is commonly applied to the chroma component in screen content image representation and processing (e.g., YUV4:2:0 compression), will significantly degrade the image quality and create annoying artifacts such as blur and color shifting. To tackle this problem, in this paper we propose luma aware chroma downsampling and upsampling algorithms to jointly improve the quality of the chroma image reconstruction. Guided by the luma information, the chroma upsampling algorithm is proposed with the utilization of major color and index map representation. The geometric information-based linear mapping is developed to transfer the structure of luma to the interpolated chroma. Subsequently, the error sensitivity of the upsampling method is analyzed, and content dependent downsampling algorithm is presented to minimize the error sensitivity function. We further explore the applicability of the proposed scheme in the scenario of screen content compression, targeting at improving the decoded chroma image quality for display. Extensive experimental results demonstrate the viability and efficiency of the proposed scheme.; National Basic Research Program of China (973 Program) [2015CB351800]; National Science Foundation of China [61322106, 61421062]; Cooperative Medianet Innovation Center; SCI(E); EI; ARTICLE; sqwang1986@gmail.com; gukesjtuee@gmail.com; swma@pku.edu.cn; wgao@pku.edu.cn; 9; 1595-1609; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494405]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Shiqi,Gu, Ke,Ma, Siwei,et al. Joint Chroma Downsampling and Upsampling for Screen Content Image[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY,2016.
APA	Wang, Shiqi,Gu, Ke,Ma, Siwei,&Gao, Wen.(2016).Joint Chroma Downsampling and Upsampling for Screen Content Image.IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY.
MLA	Wang, Shiqi,et al."Joint Chroma Downsampling and Upsampling for Screen Content Image".IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY (2016).