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色彩管理(续2)

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发表于 2004-4-5 22:49:00 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 佣书自雄 于 2016-4-10 20:38 编辑

< align=center class=MsoNormal style="TEXT-ALIGN: center"><SPAN style="FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">       
< class=MsoNormal><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">参考色空间</SPAN><SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o:p></o:p></SPAN></B>
< class=MsoNormal style="TEXT-INDENT: 17.95pt; mso-char-indent-count: 1.71; mso-char-indent-size: 10.45pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">今天我们使用的色彩管理系统实际上使用了两个参考色空间,分别被称作</SPAN><SPAN lang=EN-US>CIE XYZ(1931)</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN lang=EN-US>CIE Lab(1976)</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。我们已经在上一讲里了解到关于这两个色空间的较为详细的说明。要想明白色彩管理系统是如何工作的,对于这两个色空间你只需要了解两件事情:</SPAN>
< class=MsoNormal style="MARGIN-LEFT: 21pt; TEXT-INDENT: -21pt; tab-stops: list 21.0pt; mso-list: l0 level1 lfo12"><SPAN lang=EN-US style="FONT-FAMILY: Wingdings">l<SPAN style="FONT: 7pt 'Times New Roman'">                                                                 </SPAN></SPAN><SPAN lang=EN-US>Lab</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是</SPAN><SPAN lang=EN-US>XYZ</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的数学等价变换</SPAN>
< class=MsoNormal style="MARGIN-LEFT: 21pt; TEXT-INDENT: -21pt; tab-stops: list 21.0pt; mso-list: l0 level1 lfo12"><SPAN lang=EN-US style="FONT-FAMILY: Wingdings">l<SPAN style="FONT: 7pt 'Times New Roman'">                                                                 </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">无论</SPAN><SPAN lang=EN-US>XYZ</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">还是</SPAN><SPAN lang=EN-US>Lab</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">描述的色彩都是根据我们人类的感觉来定义的,而不是象那些产生色彩的设备一样通过控制的电信号来产生色彩。换句话说,这两个颜色空间所定义的颜色都是一个有着正常视觉的人可以看见的,这个人我们在上一节课已经认识了,叫做“标准观察者</SPAN><SPAN lang=EN-US>1931</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”。其结果就是,</SPAN><SPAN lang=EN-US>XYZ</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN lang=EN-US>Lab</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的值定义的颜色都是明确的,而不是像</SPAN><SPAN lang=EN-US>RGB</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN lang=EN-US>CMYK</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这些设备相关的色空间模型,虽然知道了数值,但如果不指明具体设备,还是不能预知确切的颜色。</SPAN>
<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设备特性文件</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></B>
<P class=MsoNormal style="TEXT-INDENT: 17.95pt; mso-char-indent-count: 1.71; mso-char-indent-size: 10.45pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设备特性文件给我们提供了所使用的彩色设备描述颜色的行为方式,如果这是一个</SPAN><SPAN lang=EN-US>RGB</SPAN><SPAN style="FONT-FAMILY: 宋

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非澹泊无以明志,非宁静无以致远。 QQ:404934485

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 楼主| 发表于 2004-4-5 22:49:00 | 只看该作者
本帖最后由 佣书自雄 于 2016-4-10 20:38 编辑

<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">色彩引擎</SPAN></B>
<P class=MsoNormal style="TEXT-INDENT: 17.95pt; mso-char-indent-count: 1.71; mso-char-indent-size: 10.45pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">色彩引擎——也被叫做</SPAN><SPAN lang=EN-US>CMM</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">(</SPAN><SPAN lang=EN-US>Color Matching Method </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或者</SPAN><SPAN lang=EN-US>Color Management Module</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">),是一段程序,当文件在设备之间传递时它实际改变着我们文件中的</SPAN><SPAN lang=EN-US>RGB</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或</SPAN><SPAN lang=EN-US>CMYK</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">数值,从而使颜色保持一致。</SPAN>
<P class=MsoNormal style="TEXT-INDENT: 17.95pt; mso-char-indent-count: 1.71; mso-char-indent-size: 10.45pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">现在让我们再回到图示</SPAN><SPAN lang=EN-US>1</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的例子,扫描仪看到的颜色是</SPAN><SPAN lang=EN-US>R247</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>G160</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>B91</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,在</SPAN><SPAN lang=EN-US>LAB</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中的值分别是</SPAN><SPAN lang=EN-US>L*76</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>a*19</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>b*46</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。现在我知道要想使同样的颜色显示在我的显示器上,我需要将</SPAN><SPAN lang=EN-US>RGB</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的值改变为</SPAN><SPAN lang=EN-US>R250</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>G175</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>B100</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。而要想在我的爱普生喷墨打印机上打印出相同的颜色,我需要将</SPAN><SPAN lang=EN-US>RGB</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">值改为</SPAN><SPAN lang=EN-US>R244</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>G192</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</SPAN><SPAN lang=EN-US>B148</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Rom

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非澹泊无以明志,非宁静无以致远。 QQ:404934485

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发表于 2004-4-5 23:41:00 | 只看该作者

色彩管理(续2)

本帖最后由 佣书自雄 于 2016-4-10 20:38 编辑

谢谢技术共享
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