基于SSLUT的颜色空间转换的快速算法

山东大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (1): 41-47.

基于SSLUT的颜色空间转换的快速算法

刘一方1,2, 张云峰1,2*, 迟静1,2,张彩明1,2

1. 山东财经大学计算机科学与技术学院, 山东济南 250014;
2. 山东省数字媒体技术重点实验室,山东济南 250014

收稿日期:2012-12-05 出版日期:2013-02-20 发布日期:2012-12-05
通讯作者: 张云峰(1977- ),男,山东高唐人,教授,博士,主要研究方向为计算几何与图像处理.E-mail:yfzhang@sdufe.edu.cn
作者简介:刘一方(1990- ),女,山东青州人,硕士研究生,主要研究方向为图像处理.E-mail:sdliuyifang@163.com
基金资助:
国家自然科学基金资助项目(61073080); 山东省自然科学基金资助项目(ZR2010FQ025); 济南市科技明星计划资助项目(201101-0113)

A fast algorithm for color space transformation based on SSLUT

LIU Yi-fang1,2, ZHANG Yun-feng1,2*, CHI Jing1,2, ZHANG Cai-ming1,2

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

Received:2012-12-05 Online:2013-02-20 Published:2012-12-05

摘要/Abstract

摘要：

为了满足实时视频分析中颜色空间转换的效率要求,本研究提出了一种DSP上基于简化移位和查表法(simplified shift and lookup table method, SSLUT)的YCbCr到HSV颜色空间的快速转换算法,并对转换后的图像质量做了综合评价。首先,采用定点移位法把YCbCr转换到RGB,再用查表法将RGB转换到HSV,以实现YCbCr到HSV的快速转换。其次,分别基于DSP和PC两个平台上分析了算法速度。最后,从客观测量和满足人眼视觉特性两个方面,利用峰值信噪比和结构相似性算法综合评价转换后的图像质量。通过算法时间和图像质量评价实验的结果表明,该算法具有良好的实时性。同时,可使图像有较高的保真度

关键词: 结构相似性算法, 峰值信噪比, 色彩空间转换, 图像质量评价

Abstract:

To meet the efficiency requirement of color space conversion in real-time video systems, a new fast algorithm for the color space YCbCr to HSV conversion was proposed based on the simplified shift and look-up table (SSLUT). The transformed image quality assessment was implemented. The process of color space conversion was divided into two steps. First, the fixed-point shift method was used to convert YCbCr to RGB. Second, the color space RGB to HSV conversion was used for look-up table method. The fast algorithm speed was tested based on DSP and PC Testing Platform. The image quality assessment was achieved using the structural similarity (SSIM) and the peak signal to noise ratio (PSNR). The results showed that the real-time capability was satisfactory and the transformed image had high fidelity.

Key words: color space conversion, structural similarity, image quality assessment, PSNR

中图分类号:

TP391

刘一方1,2, 张云峰1,2*, 迟静1,2,张彩明1,2. 基于SSLUT的颜色空间转换的快速算法[J]. 山东大学学报(工学版), 2013, 43(1): 41-47.

LIU Yi-fang1,2, ZHANG Yun-feng1,2*, CHI Jing1,2, ZHANG Cai-ming1,2. A fast algorithm for color space transformation based on SSLUT[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2013, 43(1): 41-47.

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