<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<!-- saved from url=(0061)http://blog.csdn.net/colorant/archive/2007/12/03/1913162.aspx -->
<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>YUV / RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客</TITLE>
<META content=彩色蚂蚁 name=author>
<META content=Csdn name=Copyright>
<META content=分析色彩空间模型原理,设计快速转换算法 name=description>
<META http-equiv=Content-Type content="text/html; charset=utf-8"><LINK
href="http://profile.csdn.net/colorant/picture/1.ico" rel="Shortcut Icon"><LINK
media=all
href="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/Cogitation_1.css"
type=text/css rel=stylesheet><LINK media=all
href="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/csdn_favbykimi.css"
type=text/css rel=stylesheet>
<SCRIPT
src="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/jquery-1.2.3.pack.js"
type=text/javascript></SCRIPT>
<SCRIPT
src="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/jquery.highlighter.js"
type=text/javascript></SCRIPT>
<SCRIPT
src="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/highlighter.js"
type=text/javascript></SCRIPT>
<LINK title=RSS href="http://feeds.feedsky.com/csdn.net/colorant"
type=application/rss+xml rel=alternate>
<META content="MSHTML 6.00.2900.3527" name=GENERATOR></HEAD>
<BODY id=defaultuser>
<DIV id=csdnblog_allwrap>
<FORM id=Form1 name=Form1 action=1913162.aspx method=post><INPUT
id=" __VIEWSTATE" type=hidden name=__VIEWSTATE>
<DIV id=csdnblog_midwrap>
<DIV id=csdnblog_header>
<H1><A id=Header1_HeaderTitle
href="http://blog.csdn.net/colorant/">colorant的专栏</A></H1>
<H2>彩色蚂蚁的Linux博客</H2>
<UL id=personalnav>
<LI><A href="http://hi.csdn.net/my.html" target=_blank>欢迎
zhenwenxian!</A></LI>
<LI><A href="http://writeblog.csdn.net/Signout.aspx">退出</A></LI>
<LI><A href="http://blog.csdn.net/zhenwenxian">我的博客</A></LI>
<LI><A href="http://writeblog.csdn.net/configure.aspx"
target=_blank>配置</A></LI>
<LI><A href="http://writeblog.csdn.net/PostEditPlain.aspx"
target=_blank>写文章</A></LI>
<LI><A href="http://writeblog.csdn.net/PostList.aspx"
target=_blank>文章管理</A></LI>
<LI><A href="http://blog.csdn.net/" target=_blank>博客首页</A></LI></UL>
<UL id=blogsearchsty>
<LI><INPUT class=bolgsearch id=inputSearch
onkeydown="return keyb(event)"></LI>
<LI class=selectsty><SELECT id=Search_ddlSearchScope
name=Search:ddlSearchScope><OPTION value=all selected>全站</OPTION><OPTION
value=colorant>当前博客</OPTION></SELECT></LI>
<LI><INPUT class=bolggobtn onclick=checkNull() type=button value=搜索></LI></UL>
<UL id=menu>
<LI><A href="http://hi.csdn.net/colorant">空间</A></LI>
<LI><A class=on href="http://blog.csdn.net/colorant">博客</A></LI>
<LI><A
href="http://hi.csdn.net/colorant/profile/contactlist/1.html">好友</A></LI>
<LI><A href="http://album.hi.csdn.net/" target=_blank>相册</A></LI>
<LI><A class=last
href="http://hi.csdn.net/colorant/profile/notebook/1.html">留言</A></LI></UL></DIV>
<DIV id=csdnblog_content>
<DIV class=gutter>
<DIV class=default_contents>
<DIV class=user_article>
<SCRIPT
src="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/LoadFeedbackCount.js"
type=text/javascript></SCRIPT>
<H1 class=title_txt><IMG height=16 alt=原创
src="YUV - RGB 格式分析及快速查表算法设计 - colorant的专栏 - CSDN博客.files/authorship.gif"
width=15 border=0> YUV / RGB 格式分析及快速查表算法设计<CITE
class=fav_csdnstylebykimi><A class=fav_csdnstylebykimi title=收藏到我的网摘中,并分享给我的朋友
href="javascript:d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(saveit=window.open('http://wz.csdn.net/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'saveit','scrollbars=no,width=590,height=300,left=75,top=20,status=no,resizable=yes'));saveit.focus();">收藏</A></CITE></H1>
<DIV class=blogstory>
<SCRIPT>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</SCRIPT>
<DIV align=center><STRONG><SPAN style="FONT-SIZE: 22pt"></SPAN></STRONG></DIV>
<DIV><STRONG><FONT size=6><SPAN>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作者:刘旭晖</SPAN><FONT
face="Times New Roman"> <SPAN lang=EN-US><A href="mailto:colorant@163.com"><FONT
color=#000080>colorant@163.com</FONT></A> </SPAN></FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">转载请注明出处</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><FONT color=#000080 size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><A
href="http://blog.csdn.net/colorant/">http://blog.csdn.net/colorant/</A></SPAN></FONT></P></SPAN></FONT></STRONG></DIV>
<DIV><STRONG><FONT size=6><SPAN>1<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN>前言</FONT></STRONG></DIV>
<DIV> </DIV>
<DIV>自然界的颜色千变万化,为了给颜色一个量化的衡量标准,就需要建立色彩空间模型来描述各种各样的颜色,由于人对色彩的感知是一个复杂的生理和心理联合作用的过程,所以在不同的应用领域中为了更好更准确的满足各自的需求,就出现了各种各样的色彩空间模型来量化的描述颜色。我们比较常接触到的就包括
RGB / CMYK / YIQ / YUV / HSI等等。</DIV>
<DIV> </DIV>
<DIV>对于数字电子多媒体领域来说,我们经常接触到的色彩空间的概念,主要是RGB ,
YUV这两种(实际上,这两种体系包含了许多种具体的颜色表达方式和模型,如sRGB, Adobe RGB, YUV422, YUV420 …),
RGB是按三基色加光系统的原理来描述颜色,而YUV则是按照 亮度,色差的原理来描述颜色。</DIV>
<DIV> </DIV>
<DIV><SPAN> </SPAN>即使只是RGB
YUV这两大类色彩空间,所涉及到的知识也是十分丰富复杂的,在下自知不具备足够的相关专业知识,所以本文主要针对工程领域的应用及算法进行讨论。</DIV>
<DIV> </DIV>
<DIV><STRONG><FONT size=6><SPAN>2<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN>YUV相关色彩空间模型</FONT></STRONG></DIV>
<DIV><STRONG><FONT size=5><SPAN>2.1<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN>YUV 与 YIQ YcrCb</FONT></STRONG></DIV>
<DIV>对于YUV模型,实际上很多时候,我们是把它和YIQ / YCrCb模型混为一谈的。</DIV>
<DIV>实际上,YUV模型用于PAL制式的电视系统,Y表示亮度,UV并非任何单词的缩写。</DIV>
<DIV>YIQ模型与YUV模型类似,用于NTSC制式的电视系统。YIQ颜色空间中的I和Q分量相当于�