boreasy 发表于 2006-5-13 10:53:00

[下载]安防行业基础技术知识

<p>安防行业基础知识,本人花费好多时间整理,希望能对大家有所帮助!另:本人还有些报警类/机器视觉类/自动控制类/工业检测类/图像处理类的资料,看回复情况贴出来!</p><p></p><br/>
[此贴子已经被作者于2006-5-13 11:31:04编辑过]

boreasy 发表于 2006-5-13 11:01:00

&nbsp;<p class="MsoNormal" style="MARGIN-LEFT: 36pt; MARGIN-RIGHT: 36pt; WORD-BREAK: break-all; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><shapetype id="_x0000_t75"></shapetype><stroke></stroke><stroke></stroke><formulas></formulas><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><formulas></formulas><path></path><path></path><lock></lock><lock></lock><shapetype></shapetype><shape id="_x0000_i1025" style="HEIGHT: 15.75pt; WIDTH: 15.75pt;"></shape><imagedata></imagedata><imagedata></imagedata><shape></shape></span><b><span style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">安防知识</span></b><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"> <p></p></span></p><p></p><p></p><p style="LINE-HEIGHT: 125%; MARGIN-LEFT: 36pt; MARGIN-RIGHT: 36pt; WORD-BREAK: break-all;"><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">   什么是</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CMOS</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">摄像机?和</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CCD</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">摄像机有何不同?</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/>CMOS</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">传感器是一种通常比</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CCD</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">传感器低</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">10</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">倍感光度的传感器。因为人眼能看到</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">1Lux</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">照度(满月的夜晚)以下的目标,</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CCD</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">传感器通常能看到比人眼略好在</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">0.1~3Lux</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,是</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CMOS</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">传感器感光度的</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">3</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">到</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">10</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">倍。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><p></p></span></p><p></p><p></p><p style="MARGIN-LEFT: 36pt; MARGIN-RIGHT: 36pt; WORD-BREAK: break-all;"><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">镜头探析</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/>1</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">.镜头的种类(根据应用场合分类)</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">&nbsp;<br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  广角镜头:视角</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">90</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">度以上,观察范围较大近处图像有变形。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  标准镜头:视角</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">30</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">度左右,使用范围较广。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  长焦镜头:视角</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">20</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">度以内,焦距可达几十毫米或上百毫米。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  变焦镜头:镜头焦距连续可变,焦距可以从广角变到长焦,焦距越长则成像越大。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  针孔镜头:用于隐蔽观察,经常被安装在如天花板或墙壁等地方。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><p></p></span></p><p></p><p></p><p style="MARGIN-LEFT: 36pt; MARGIN-RIGHT: 36pt; WORD-BREAK: break-all;"><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">2</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">.被摄物体的大小、距离与焦距的关系</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  假设被摄物体的宽度和高度分别为</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">W.H,</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">被摄物体与镜头间的距离为</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">L</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,镜头的焦距为</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">F</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><p></p></span></p><p></p><p></p><p style="MARGIN-LEFT: 36pt; MARGIN-RIGHT: 36pt; WORD-BREAK: break-all;"><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">3</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">.相对孔径</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><br/></span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">  为了控制通过镜头的光通量的大小,在镜头的后部均设置了光圈。假定光圈的有效孔径为</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">d</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,由于光线折射的关系,镜光实际有效的有效孔径为</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">D</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,比</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">d</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">大,</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">D</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">与焦距</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">f</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">之比定义为相对孔径</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">A</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,即</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">A=D/f</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">,镜头的相对孔径决定被摄像的照度,像的照度与镜头的相对孔径的倒数来表示镜头光圈的大小。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">F</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">值越小,光圈越大,到达</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">CCD</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">芯片的光通量就越大。所以在焦距</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">f</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">相同的情况下,</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;">F</span><span style="FONT-SIZE: 9pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana;">值越小,表示镜头越好。</span><span lang="EN-US" style="FONT-FAMILY: Verdana; FONT-SIZE: 9pt;"><p></p></span></p><p></p><p></p>

hdq211 发表于 2006-5-14 19:45:00

<p>好资料,谢谢啦</p>

boreasy 发表于 2006-5-15 11:22:00

<p>不客气,共同学习</p><p></p>

szstv8888 发表于 2006-5-15 11:36:00

<p>好资料,我收下啦,希望多多努力,发表更多的好贴子。</p>

lucency 发表于 2006-5-15 22:26:00

<p>可以的话送一份给我的邮箱.谢谢</p><p>etcte@126.com</p>

duyuzu 发表于 2006-6-5 15:09:00

好东东,谢谢

boreasy 发表于 2006-6-20 19:27:00

<p>安防这个行业很大也很乱,安防的老板也很多</p>

bxruilang 发表于 2006-7-19 13:52:00

好资料,

soundIP 发表于 2006-7-19 15:10:00

学习

维瑞特 发表于 2006-7-26 05:28:00

<p>下两次了。</p><p>倒!!!!</p>

sihan2004 发表于 2006-8-4 14:56:00

ding

粤涯 发表于 2006-8-4 15:10:00

感谢楼主的无私奉献

ntdiy 发表于 2006-8-5 19:38:00

谢谢啦

lzzql 发表于 2010-3-29 21:35:00

<img style="BORDER-BOTTOM: #fff 1px="1px"solid; BORDER-LEFT: #ccc 1px="1px"solid; BORDER-TOP: #ccc 1px="1px"solid; BORDER-RIGHT: #fff 1px="1px"solid" id="dvedit_0_emot_56" onmouseover="window.dv___.t.setIcon(this,2)" onmouseout="window.dv___.t.setIcon(this,0)" onmousedown="window.dv___.t.setIcon(this,1)"src="http://www.1000bbs.com/images/emot/em56.gif"/>

newsdream 发表于 2010-3-31 23:46:00

<p>积人不够 能否发一分到 <a href="mailto:tlzchcg@126.com">tlzchcg@126.com</a> 多谢了</p>

apple8888 发表于 2010-4-1 08:32:00

好资料,下载学习一下

amouruuu 发表于 2010-4-1 08:59:00

技术交流还有积分限制#80

drops 发表于 2010-4-5 23:43:00

<p>好东西, </p>

a43353041 发表于 2010-4-6 14:49:00

先顶
页: [1] 2 3
查看完整版本: [下载]安防行业基础技术知识