A fast algorithm for YCbCr to perception color model conversion based on fixed-point DSP

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• 作者：Yifang Liu ; Yunfeng Zhang ; Caiming Zhang
• 关键词：Real ; time video system ; Color space conversion ; Perception color model ; Video quality assessment
• 刊名：Multimedia Tools and Applications
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：74
• 期：15
• 页码：6041-6067
• 全文大小：3,755 KB
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• 作者单位：Yifang Liu (1) (2)
  Yunfeng Zhang (1) (2)
  Caiming Zhang (1) (2)
  
  1. School of Computer Science & Technology, Shandong University of Finance and Economics, Jinan, 250014, China
  2. Shandong Provincial Key Laboratory of Digital Media Technology, Jinan, 250014, China
  
• 刊物类别：Computer Science
• 刊物主题：Multimedia Information Systems
  Computer Communication Networks
  Data Structures, Cryptology and Information Theory
  Special Purpose and Application-Based Systems
  
• 出版者：Springer Netherlands
• ISSN：1573-7721

文摘

Real-time video processing heavily relies on the color space conversion. Due to the real-time requirement, the traditional conversion methods often suffer from the moderate conversion speed, inaccuracy and low video quality. In order to meet the efficiency requirement of color space conversion in real-time video systems, we present a fast algorithm for color space YCbCr to perception color model conversion, which is based on the simplified shift and look-up table (SSLUT). The approach can be divided into two steps. At first, the simplified fixed-point shift method is used to convert YCbCr to RGB. Then look-up table assists with the YCbCr to perception color model conversion, such as HSV, HSI and HSL. To validate the proposed fast algorithm, the conversion speed and accuracy are compared with the traditional methods based on Code Composer Studio (CCS) test platform. Moreover, we make the video quality evaluation by using the peak signal-to-ratio (PSNR) and the structural similarity (SSIM). Experimental results illustrate the real-time, robustness and accuracy of the fast algorithm.