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关系等</span><span
lang=3DEN-US>)</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>和高层语&#=
20041;特征</span><span
lang=3DEN-US>(</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>是人们对&#=
22270;像内容概念级的反ą=
44;,一般是对图像内容=
的文字性描述</span><span
lang=3DEN-US>)</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span><span lang=3DEN-US>=
CBIR</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>突破了传统的基=
于关键字的表达式检=
2034;的局限,直接对图ࠔ=
7;内容进行分析和特征&=
#25552;取,利用这些描述=
270;像内容的特征建立索=
;引。</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal><span lang=3DEN-US>CBIR </span><span style=3D'font-fam=
ily:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>的特点主要有:</span></p>
<p class=3DMsoNormal><span lang=3DEN-US>1)</span><span style=3D'font-family=
:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>基于内容的图像检ŀ=
34;是一种近似匹配,即=
按照某种相似性度量=
5292;比较图像特征间的௥=
6;似度。相似度较高的&=
#22270;像将作为检索结果$=
820;回给用户。</span></p>
<p class=3DMsoNormal><span lang=3DEN-US>2)</span><span style=3D'font-family=
:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>特征提取和匹配可Ĭ=
01;计算机自动完成。</span><=
/p>
<p class=3DMsoNormal><span lang=3DEN-US>3)</span><span style=3D'font-family=
:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>为了提高检索的准Ĵ=
30;性,整个过程是个逐=
步逼近和相关反馈的=
6807;程。用户的交互性ࣜ=
6;强了表达查询、评价&=
#26597;询结果和基于评价 =
467;果进行进一步检索的=
;能力。</span><span
lang=3DEN-US> </span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;mso-char-indent-count:2.0'=
><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>目前已有许多通=
用目的的图像搜索引=
5806;,例如,在商用领ࣉ=
5;,</span><span
lang=3DEN-US>IBM </span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>首先=
研制出了</span><span
lang=3DEN-US>QBIC</span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>系统=
;在学术研究领域,</s=
pan><span
lang=3DEN-US>MIT</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>的</span><=
span
lang=3DEN-US>Photobook</span><span style=3D'font-family:SimSun;mso-ascii-fo=
nt-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>系统=
,新加坡国立大学的</s=
pan><span
lang=3DEN-US>CORE</span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>系统=
,美国哥伦比亚大学=
0340;</span><span
lang=3DEN-US>VisualSEEK</span><span style=3D'font-family:SimSun;mso-ascii-f=
ont-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>系统=
,加利福尼亚大学</span><span
lang=3DEN-US>Santa Barbara</span><span style=3D'font-family:SimSun;mso-asci=
i-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>分校=
的</span><span
lang=3DEN-US>Netra</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>、伊=
利诺依大学的</span><span
lang=3DEN-US>MARS</span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>、</span><=
span
lang=3DEN-US>CMU</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>的</span><=
span
lang=3DEN-US>Infomedia</span><span style=3D'font-family:SimSun;mso-ascii-fo=
nt-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>以及=
哥伦比亚大学的</span><span
lang=3DEN-US>VideoQ</span><span style=3D'font-family:SimSun;mso-ascii-font-=
family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>等。=
</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;mso-char-indent-count:2.0'=
><span
lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>运用颜色&#=
30452;方图进行检索有如Ç=
79;三种方式:</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>(</span><span lang=3DEN-US>=
1</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>)指明颜色组成=
</span><span
lang=3DEN-US>--</span><span style=3D'font-family:SimSun;mso-ascii-font-fami=
ly:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>该法需要&#=
29992;户对图像中的颜色ƃ=
50;常敏感,而且使用起=
来也不方便,检索的=
6597;准率和查全率并不ོ=
0;,因此暂时不做进一&=
#27493;开发。</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>(</span><span lang=3DEN-US>=
2</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>)指明一幅示例=
图像</span><span
lang=3DEN-US>--</span><span style=3D'font-family:SimSun;mso-ascii-font-fami=
ly:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>通过与用&#=
25143;确定的图像的颜色İ=
52;方图的相似性匹配得=
到查询结果,这是该=
5838;题研究方法的根本Ӎ=
0;</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>(</span><span lang=3DEN-US>=
3</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>)指明图像中一=
个子图</span><span
lang=3DEN-US>--</span><span style=3D'font-family:SimSun;mso-ascii-font-fami=
ly:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>分割图像&#=
20026;各个小块,然后利ī=
92;选择小块来确定图像=
中感兴趣的对象的轮=
4275;,通过建立更复杂௚=
0;颜色关系(如颜色对&=
#26041;法)来查询图像,#=
813;方法是进一步优化检=
;索的一个设想。</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;mso-char-indent-count:2.0'=
><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>在颜色空间选取=
方面,最常用的颜色=
1354;间是</span><span
lang=3DEN-US>RGB</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>颜色=
空间。通常,人们采=
9992;欧氏距离来刻划两మ=
1;颜色之间的差异,</span><s=
pan
lang=3DEN-US>RGB</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>空间=
存在的一个严重问题=
6159;其中所计算出来的ߐ=
4;种颜色之间的距离无&=
#27861;正确表征人们实际=
152;感知到的这两种颜色=
;之间的真实差异。</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;mso-char-indent-count:2.0'=
><span
lang=3DEN-US>HSI</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>空间=
比较直观并且符合人=
0340;视觉特性。</span><span
lang=3DEN-US>HSI</span><span style=3D'font-family:SimSun;mso-ascii-font-fam=
ily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>颜色=
模型有两个重要的特=
8857;作为基础。首先,</span=
><span
lang=3DEN-US>I</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>分量与彩&#=
33394;信息无关,其次</span><span
lang=3DEN-US>H</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>和</span><span lang=3DEN-US>=
S</span><span
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