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class="proBig"><div id="tnjpd9f" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szzzcr/637350937343310547/1583826.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hhfdzxb" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szzzcr/637350937343310547/1583826.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="rzhdj9p" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>湖北車載攝像機(jī)廠商哪家好,車載攝像機(jī)</p><p><span>***更新：</span>2021-02-06 00:23:13</p><p><span id="click" >瀏覽次數(shù)：5次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="bh7hp5h" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市中智創(chuàng)銳科技有限公司</a></p><p><span>聯(lián)系人：</span>郭永宏</p><p><span>郵箱: </span>571787179@qq.com</p><p><span>電話: </span>13028858586</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.zzcrtech.com</p><p><span>手機(jī): </span>0755-23722871</p><p><span>地址: </span>大浪街道石場(chǎng)路星越大廈206 </p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="bxvjptf" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="9zdjp5n" class="box"><p><p style="text-indent:25px">較大光圈的真正價(jià)值表現(xiàn)在提高弱光情況下的進(jìn)光量，從而達(dá)到較佳曝光組合。拍攝風(fēng)景一般不太要求鏡頭的虛化能力，另外，除特別暗的場(chǎng)所外一般也不太苛求鏡頭口徑。但是，當(dāng)70－200mm變焦鏡頭加裝2倍增距鏡而使望遠(yuǎn)焦段變成400mm并用AF自動(dòng)聚焦時(shí)，較好選擇較大光圈是F2.8的鏡頭。大光圈有利于在較暗條件下準(zhǔn)確聚焦。用大口徑鏡頭拍攝人物即便在光線較弱的地方也能手持機(jī)利用自然光拍攝。另外，較大光圈大的鏡頭能帶來較快的快門速度，所以體育攝影也需要大口徑鏡頭。要求鏡頭光圈大的另一個(gè)理由是能自由自在地虛化背景，湖北車載攝像機(jī)廠商哪家好，而且保證虛化品質(zhì)。較大光圈F1，湖北車載攝像機(jī)廠商哪家好.4的鏡頭當(dāng)光圈縮小到F2時(shí)，無論是成像品質(zhì)還是對(duì)背景的虛化品質(zhì)都要強(qiáng)于較大光圈是F2的鏡頭。所以說，湖北車載攝像機(jī)廠商哪家好，大口徑鏡頭縮小一檔光圈具有相當(dāng)大的價(jià)值，任何攝影者都要善于利用鏡頭這一特性。高速攝影機(jī)由光學(xué)系統(tǒng)、快門、輸片和收片機(jī)構(gòu)、機(jī)架和時(shí)間控制機(jī)構(gòu)等部分組成。湖北車載攝像機(jī)廠商哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北車載攝像機(jī)廠商哪家好,車載攝像機(jī)" src="https://tyunfile.71360.com/UploadFile/szzzcr/637350937343310547/1583826.png"></div><p style="text-indent:25px">市面上的電源插排多數(shù)質(zhì)量不好，內(nèi)部的接點(diǎn)都是采用手工焊接，并且常采用酸性助焊劑，這樣容易導(dǎo)致在以后的使用中焊點(diǎn)氧化引起斷路或者火線和零線之間漏電。因?yàn)槭止ず附樱瑫r(shí)因?yàn)椴捎玫牧S銅片彈性差，用不了多長(zhǎng)時(shí)間就容易失去彈性，致使與主機(jī)或顯示器的電源插頭接觸不良而產(chǎn)生較大的接觸電阻，在長(zhǎng)時(shí)間工作時(shí)就會(huì)大量發(fā)熱而導(dǎo)致虛接，這時(shí)就會(huì)表現(xiàn)為主機(jī)重新啟動(dòng)或顯示器黑屏閃爍。還有一個(gè)可能是我們家里使用的墻壁插座，多數(shù)墻壁插座的安裝都不是使用專業(yè)人員，所以插座內(nèi)部的接線非常的不標(biāo)準(zhǔn)，特別這些插座如果我們經(jīng)常使用大功率的電暖器時(shí)就比較容易導(dǎo)致內(nèi)部發(fā)熱氧化虛接而形成間歇性的斷電，引起硬盤錄像機(jī)重啟或顯示器眨眼現(xiàn)象。北京車載攝像機(jī)生產(chǎn)商被動(dòng)紅外攝像技術(shù)由于設(shè)備造價(jià)高且不能反映周圍環(huán)境狀況，因此在夜視系統(tǒng)中不被采用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北車載攝像機(jī)廠商哪家好,車載攝像機(jī)" src="https://tyunfile.71360.com/UploadFile/szzzcr/637350937236767578/3113194.png"></div><p style="text-indent:25px">選擇鏡頭時(shí)比較多人首先注意的是這款鏡頭的成像銳度如何。照片的用途決定了需要什么樣銳度的鏡頭。高價(jià)優(yōu)良鏡頭主要供專業(yè)攝影師使用，如果只是一般攝影，就沒必要花比較多錢購(gòu)買高價(jià)優(yōu)良鏡頭。另外，鏡頭的成像銳度還和光圈大小有直接關(guān)系，當(dāng)一款鏡頭從較大光圈縮小一兩檔之后成像銳度會(huì)大幅度提高?；兪怯社R頭光學(xué)性能引起的一種光學(xué)現(xiàn)象，每款鏡頭都不可能不存在畸變，廠家在生產(chǎn)鏡頭時(shí)都對(duì)畸變進(jìn)行了修正，力求把畸變控制在較低程度。一般來說鏡頭畸變主要有三種：變焦鏡頭廣角端容易產(chǎn)生的桶型畸變、望遠(yuǎn)端容易出現(xiàn)的枕型畸變和對(duì)廣角端桶型畸變進(jìn)行修正后所產(chǎn)生的斗笠型畸變。就鏡頭現(xiàn)狀來說，較突出的問題是廣角端的桶型畸變，選購(gòu)時(shí)要盡可能選擇桶型畸變小的款式。逆光攝影時(shí)由于強(qiáng)烈的陽光或其他強(qiáng)光源在鏡面反復(fù)反射會(huì)在畫面上形成光暈和耀斑。形成光暈和耀斑的這一小部分光線不僅不會(huì)在畫面上成像，而且還會(huì)在鏡內(nèi)形成亂反射而降低畫質(zhì)。為防止這種現(xiàn)象，逆光攝影時(shí)必須使用遮光罩。優(yōu)良的鏡頭在生產(chǎn)制造過程中采取了徹底防止光暈和耀斑的工藝，即便在逆光拍攝時(shí)反差也比較好。</p><p style="text-indent:25px">錄像機(jī)是閉路電視監(jiān)視系統(tǒng)中的記錄和重放裝置，它要求可以記錄的時(shí)間非常長(zhǎng)，大部分監(jiān)視系統(tǒng)**的錄像機(jī)都可以錄24H～960H的錄像。此外，錄像機(jī)還必須要有遙控功能，從而能夠方便地對(duì)錄像機(jī)進(jìn)行遠(yuǎn)距離操作，或在閉路電視系統(tǒng)中用控制信號(hào)自動(dòng)操作錄像機(jī)。閉路電視監(jiān)視系統(tǒng)中**錄像機(jī)是間歇式視頻錄像機(jī)，它有多種時(shí)間間隔錄像模式，在一盤1/2英寸VHS/E180的盒帶上，較長(zhǎng)可以錄制長(zhǎng)達(dá)960H的錄像。錄像機(jī)內(nèi)設(shè)有字符信號(hào)發(fā)生器，可在圖像信號(hào)上打出月/日/年/星期/時(shí)/分/秒/錄像模式，還能在圖像上示出攝像機(jī)與報(bào)警器的編號(hào)與報(bào)警方式。使用自動(dòng)錄像周期設(shè)定功能，可以對(duì)一星期內(nèi)每24小時(shí)的錄像模式進(jìn)行編程。當(dāng)收到報(bào)警信號(hào)后，錄像機(jī)便自動(dòng)進(jìn)入連續(xù)錄像狀態(tài)，在無報(bào)警情況下，恢復(fù)正常間歇錄像模式。此外，錄像機(jī)還有一個(gè)鎖定保護(hù)鍵，使非正常指令與操作無效，防止非專業(yè)人員與破壞性操作侵犯閉路電視監(jiān)控系統(tǒng)。市場(chǎng)上的車載攝像機(jī)一般有兩種存儲(chǔ)設(shè)備，普通的電腦硬盤和sd卡。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北車載攝像機(jī)廠商哪家好,車載攝像機(jī)" src="https://tyunfile.71360.com/UploadFile/szzzcr/637350937372832032/1809874.png"></div><p style="text-indent:25px">攝像機(jī)的設(shè)置位置、攝像方向及照明條件應(yīng)符合下列規(guī)定：（1）攝像機(jī)宜安裝在監(jiān)視目標(biāo)附近不易受外界損傷的地方，安裝位置不應(yīng)影響現(xiàn)場(chǎng)設(shè)備運(yùn)行和人員正?；顒?dòng)。安裝的高度，室內(nèi)宜距地面2.5～5m；室外應(yīng)距地面3.5～10m，并不得低于3.5m。（2）電梯廂內(nèi)的攝像機(jī)應(yīng)安裝在電梯廂頂部、電梯操作器的對(duì)角處，并應(yīng)能監(jiān)視電梯廂內(nèi)全景。（3）攝像機(jī)鏡頭應(yīng)避免強(qiáng)光直射，保證攝像管靶面不受損傷。鏡頭視場(chǎng)內(nèi)，不得有遮擋監(jiān)視目標(biāo)的物體。（4）攝像機(jī)鏡頭應(yīng)從光源方向?qū)?zhǔn)監(jiān)視目標(biāo)，并應(yīng)避免逆光安裝；當(dāng)需要逆光安裝時(shí)，應(yīng)降低監(jiān)視區(qū)域的對(duì)比度。車載攝像機(jī)應(yīng)用發(fā)展呈現(xiàn)的趨勢(shì)：應(yīng)用發(fā)展趨勢(shì)之人機(jī)交互系統(tǒng)。吉林車載攝像機(jī)供應(yīng)商有哪些</p><p style="text-indent:25px">由于車載攝像機(jī)工作環(huán)境的特殊性，常年裸露在外風(fēng)吹雨淋，所以對(duì)于攝像頭的整體防水性能要求很高。湖北車載攝像機(jī)廠商哪家好</p><p style="text-indent:25px">攝像機(jī)選用要點(diǎn)：成像元件就像人的視網(wǎng)膜，是攝像頭的中心部件。目前我國(guó)尚無能力制造，比較普遍的成像元件就是CCD（也有CMOS）。CCD的主要區(qū)分在于色彩、尺寸及品牌。（1）CCD芯片按色彩可分為彩色和黑白，彩色適用于景物細(xì)部辨別，如辨別衣著或景物的顏色。黑白適用于光線不充足地區(qū)及夜間無法安裝照明設(shè)備的地區(qū)，價(jià)格較低。（2）CCD芯片按靶面大小可分為以下幾種尺寸：CCD靶面的大小直接關(guān)系攝像機(jī)視角的大小，也對(duì)照度有一定影響，與清晰度無關(guān)。CCD芯片尺寸越大視角越廣，價(jià)格也越高。采用的芯片大多數(shù)是性價(jià)比較高的1/3英寸和1/4英寸。湖北車載攝像機(jī)廠商哪家好</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3180424.html</p></div></div></div></div></div><div id="xbhpl5l" class="page-right twoColRt"><div id="vbjhntp" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jhxvbhd" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 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