subject_16476.htm

一些关于vc的问答

<p>
序号：16476 发表者：firebolt 发表日期：2002-09-28 16:59:32
<br>主题：请教模式识别入门级问题
<br>内容：问题： <BR>在一个固定的区域里，有黑、白、红、绿、蓝5个大小相同的球（二维），第一步，分别提取5个球的特征；第二，当球的位置发生变化后能准确的找到5个球在图象上的位置。<BR><BR>1、怎样提取特征；<BR>2、怎样准确、快速的定位；<BR><BR>请给出最快的算法 <BR><BR><BR>
<br><a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p>
<hr size=1>
<blockquote><p>
回复者：Hongfeng Wang 回复日期：2002-10-05 04:13:44
<br>内容：In R/G/B channels, binarize the image and retrieve the contour seperately,<BR>and put things together.
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：firebolt 回复日期：2002-10-05 16:04:50
<br>内容：请讲的具体一些好吗，我是刚开始做这个东西的
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：Hongfeng Wang 回复日期：2002-10-07 22:39:16
<br>内容：Firstly, I suggest you use OpenCV&nbsp;&nbsp;and IPL, which have many useful routines.<BR>To make life easier, consider 2 balls case:<BR>suppose you have a background of color RGB(0,0,0),<BR>a red ball of color RGB(255,0,0), a green ball of color(0,255,0).<BR>Then in red channel, use a threshold 128, and retrieve the contour,<BR>you can get the red ball size/position. Similarly get the green ball size/position.<BR><BR>You can figure out the 5 balls case.<BR>(Sorry, I am slow at inputing chinese)
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：firebolt 回复日期：2002-10-08 10:11:59
<br>内容：你的意思是说通过阀值先分割图象，在跟踪轮廓，然后得到球的大小和位置，我的英文不好：）。
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
<font color=red>答案被接受</font><br>回复者：Hongfeng Wang 回复日期：2002-10-08 21:44:52
<br>内容：对。这种方法速度远远高于Template Matching,<BR>而且对球的尺寸没有要求。<BR>如果你预先知道球的尺寸，可以采用combing的方法<BR>来获得Contour，速度会更快。<BR><BR>OpenCV has full source code, you can have a look.
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：firebolt 回复日期：2002-10-08 22:11:39
<br>内容：谢谢了，我现在做的一个项目需要用到模式识别，但我对图象处理还不了解，以后还请您多多指教，我的QQ33956652，希望您能加我，谢谢
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：Hongfeng Wang 回复日期：2002-10-08 22:21:22
<br>内容：You are welcome.<BR>I use yahoo messenger, ID: hongfeng_wang<BR>if you want to chat.
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：dr0 回复日期：2002-10-08 22:42:38
<br>内容：各位算法高手能否指点一下在下：<BR>http://www.vchelp.net/cndevforum/subject_view.asp?subject_id=16762&forum_id=-1
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：Hongfeng Wang 回复日期：2002-10-08 22:55:58
<br>内容：Is that a editor?<BR>Sounds like not related to this topic,?
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：dr0 回复日期：2002-10-09 19:35:14
<br>内容：whether an editor is not so important, I just wanna&nbsp;&nbsp;<BR>know how to recognize the lines: added, deleted , modified<BR>lines<BR>in a source file, e.g, *.c file.<BR>I read your post here and consider that maybe u can <BR>help me . u know I need a relatively accurate algorithm<BR>but I know nothing about pattern recognization .<BR>thanks in advance.
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：Hongfeng Wang 回复日期：2002-10-09 22:12:53
<br>内容：It's not difficult to detect text change,<BR>but if you want to detect semantic changes,<BR>it's not a easy thing, I am afraid.<BR>This is by far beyond my knowledge.
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：dr0 回复日期：2002-10-09 22:52:36
<br>内容：just as u said, i need a semantic recognization.<BR>anyway, thank u for your time.<BR>2002-10-9 22:52:49