{"id":33,"date":"2016-02-12T08:27:17","date_gmt":"2016-02-12T08:27:17","guid":{"rendered":"http:\/\/demos.famethemes.com\/onepress\/?p=33"},"modified":"2022-11-07T22:11:38","modified_gmt":"2022-11-07T21:11:38","slug":"markup-text-alignment","status":"publish","type":"post","link":"https:\/\/www.agcomp.sk\/?p=33","title":{"rendered":"TECHNICK\u00c9 POJMY PRE LAIKA"},"content":{"rendered":"<h3>Pojmy ktor\u00e9 V\u00e1m pom\u00f4\u017eu pri v\u00fdbere kamery.<\/h3>\n<p id=\"do-1mpx\"><strong>do 1 Mpx<br \/>\n<\/strong>Kamery s rozl\u00ed\u0161en\u00ed<a href=\"https:\/\/www.tssgroup.sk\/produkty\/zabezpecenie-objektov\/kamerove-systemy\/kamerovy-softver-a-licencie?ap_specialne=138725&amp;view=default\">m do jedn\u00e9h<\/a>o megapixelu s\u00fa v\u0161etky anal\u00f3gov\u00e9 kamery ako aj IP kamery s rozl\u00ed\u0161en\u00edm HD Ready (1280 x 720). Kamery s t\u00fdmto rozl\u00ed\u0161en\u00edm sa naj\u010dastej\u0161ie pou\u017e\u00edvaj\u00fa ako preh\u013eadov\u00e9 kamery, kde nie s\u00fa potrebn\u00e9 detaily.<\/p>\n<p id=\"5mpx_a_vice\"><strong>5 Mpx a viac<\/strong><br \/>\nKamery s 5 a viac megapixelov\u00fdm rozl\u00ed\u0161en\u00edm s\u00fa pou\u017e\u00edvan\u00e9 na \u0161peci\u00e1lne aplik\u00e1cie kde je nutn\u00e9 sledova\u0165 detaily, resp. ke\u010f je po\u017eadovan\u00e9 sledova\u0165 ve\u013ek\u00fa sc\u00e9nu a n\u00e1sledne na danej sc\u00e9ne vyu\u017e\u00edva\u0165 digit\u00e1lny zoom. Pr\u00edkladom pre tak\u00e9to kamery s\u00fa r\u00f4zne \u0161portov\u00e9 \u0161tadi\u00f3ny, n\u00e1mestia ako aj v\u00fdrobn\u00e9 linky, kde je potrebn\u00e9 sledova\u0165 detaily vyroben\u00fdch produktov.<\/p>\n<p id=\"4k a viace\"><strong>4K a viac<\/strong><br \/>\nN\u00e1stupca dlho pou\u017e\u00edvan\u00e9ho form\u00e1tu Full HD. Tento form\u00e1t prekon\u00e1va v\u00e4\u010d\u0161\u00edm mno\u017estvom pixelov a t\u00fdm aj v\u00e4\u010d\u0161iu jemnos\u0165ou obrazu a schopnos\u0165ou zachyti\u0165 v\u00e4\u010d\u0161\u00ed detail sc\u00e9ny, ktor\u00fd je k\u013e\u00fa\u010dov\u00fdm parametrom pri vyhodnocovan\u00ed kamerov\u00fdch z\u00e1znamov. N\u00e1zov 4K je odvoden\u00fd od minim\u00e1lneho horizont\u00e1lneho rozl\u00ed\u0161enia 4000 pixelov.<\/p>\n<p id=\"4G\"><strong>4G<\/strong><br \/>\nKamery s funkciou 4G vyu\u017e\u00edvaj\u00fa na prenos d\u00e1t pripojenie k r\u00fdchlej mobilnej d\u00e1tovej sieti prostredn\u00edctvom vlo\u017eenej SIM karty. V\u010faka elimin\u00e1cii d\u00e1tov\u00fdch k\u00e1blov, tak doch\u00e1dza k zna\u010dn\u00e9mu zjednodu\u0161eniu in\u0161tal\u00e1cie kamerov\u00e9ho bodu.<\/p>\n<p id=\"agc\"><strong>AGC (Automatic Gain Control)<\/strong><br \/>\nElektronick\u00fd obvod, ktor\u00fd udr\u017euje kon\u0161tantn\u00fa \u00farove\u0148 sign\u00e1lu &#8211; pri n\u00edzkych \u00farovniach osvetlen\u00ed zosil\u0148uje v\u00fdstupn\u00fd sign\u00e1l.<\/p>\n<p id=\"atw\"><strong>ATW (Automatic Tracing White)<\/strong><br \/>\nSledovac\u00ed syst\u00e9m automatick\u00e9 vyv\u00e1\u017eenie bielej je zodpovedn\u00fd za anal\u00fdzu v\u0161etk\u00fdch fragmentov obrazu, pokia\u013e ide o r\u00f4zne hodnoty bielej farby. Funkcia ATW automaticky nastavuje \u00farove\u0148 farieb a chr\u00e1ni jas\u00a0celej pozorovanej sc\u00e9ny.<\/p>\n<p id=\"awb\"><strong>AWB (Automatic White Balance)<\/strong><br \/>\nFunkcia zais\u0165uje spr\u00e1vne farebn\u00e9 podanie obrazu. V pr\u00edpade zmeny farebnej teploty osvetlenia &#8211; napr\u00edklad pri prechode z denn\u00e9ho svetla na \u017eiarivkov\u00e9 &#8211; vykon\u00e1 korekciu farebn\u00fdch zlo\u017eiek obrazov\u00e9ho sign\u00e1lu tak, aby farba obrazu bola \u010do najvernej\u0161\u00ed.<\/p>\n<p id=\"blc\"><strong>BLC (Backlight Compensation)<\/strong><br \/>\nAlgoritmus ur\u010den\u00fd pre kompenz\u00e1ciu protisvetla, v\u010faka ktor\u00e9mu s\u00fa vidite\u013en\u00e9 detaily obrazu, ktor\u00e9 by inak boli zatienen\u00e9, tmav\u00e9 a pr\u00edpadne by boli vidite\u013en\u00e9 iba siluety objektov. Ne\u017eiaduce jasn\u00e9 plochy mo\u017eno kompenzova\u0165 v celom obrazu, pr\u00edpadne iba vo vybranej oblasti.<\/p>\n<p id=\"day-night\"><strong>Day\/Night<\/strong><br \/>\nFunkcia Day\/Night je funkcia farebn\u00fdch kamier, ktor\u00e9 sa pri zn\u00ed\u017eenej svetelnosti prepn\u00fa do \u010diernobieleho m\u00f3du \u2013 tzv.\u00a0no\u010dn\u00fd m\u00f3d. Vo v\u0161eobecnosti plat\u00ed, \u017ee je lep\u0161ie vidie\u0165 \u010diernobielo nie\u010do ako farebne ni\u010d a pr\u00e1ve preto sa vyu\u017e\u00edva vlastnos\u0165, kde v\u017edy \u010diernobiela kamera m\u00e1 lep\u0161iu citlivos\u0165 ako farebn\u00e1. Pri kamer\u00e1ch zvy\u0161\u0161ej triedy je mo\u017en\u00e9 nastavi\u0165 aj citlivos\u0165, kedy sa kamera bude prep\u00edna\u0165 do \u010diernobieleho a sp\u00e4\u0165 do farebn\u00e9ho re\u017eimu. Pri kamer\u00e1ch z ni\u017e\u0161\u00edch tried je t\u00e1to hodnota napevno dan\u00e1 a nie je mo\u017en\u00e9 ju upravova\u0165.<\/p>\n<p id=\"defog\"><strong>Defog<\/strong><br \/>\nN\u00e1stroj pre digit\u00e1lne potla\u010denie nepriazniv\u00fdch vplyvov po\u010dasia, ak\u00fdmi s\u00fa napr\u00edklad hmla, d\u00e1\u017e\u010f alebo sne\u017eenie, na kvalitu obrazu a mno\u017estvo zrete\u013en\u00fdch detail\u016f.<\/p>\n<p id=\"dnr\"><strong>DNR<\/strong><br \/>\nRedukcia za\u0161umenia obrazu &#8211; pri n\u00edzkych sveteln\u00fdch podmienkach sa vyskytuje \u0161um v obraze, ktor\u00fd je mo\u017en\u00e9 zn\u00ed\u017ei\u0165 zapnut\u00edm funkcie DNR alebo SDNR (Super Digital Noise Reduction) pomocou \u0161peci\u00e1lneho algoritmu. V\u00fdhoda DNR a SDNR okrem lep\u0161ieho obrazu je aj v tom, \u017ee zni\u017euje ukladanie na disk o 70 % pri kompresi\u00e1ch H.264 a MPEG-4 a 40 % pri kompresii MJPEG.<\/p>\n<p id=\"dwdr\"><strong>DWDR (Digital Wide Dynamic Range)<\/strong><br \/>\nJe digitalne WDR. Na rozdiel od WDR (prave WDR byva oznacovane ako trueWDR alebo iba WDR) ide len o digitalne spracovanie, a tak nema taku kvalitu ako WDR zabudovane priamo v kamere. Pre instalacie, kde nie je potrebne kvalitne WDR, staci aj DWDR, kde je cena kamery nizsia.<\/p>\n<p id=\"eis\"><strong>EIS (Electronic Image Stabilization)<\/strong><br \/>\nU tohto druhu stabiliz\u00e1cie vezme procesor zariaden\u00ed dan\u00fd z\u00e1ber, zdeformuje ho na mal\u00e9 k\u00fasky a porovn\u00e1 ich s predch\u00e1dzaj\u00facej sn\u00edmky. T\u00fdmto sp\u00f4sobom zariadenie zist\u00ed \u010di je kamera v pohybe a do\u0161lo k ne\u017eiaduceho chvenia. K tomu je nutn\u00e9 vykona\u0165 v\u00fdrez obrazu a vyplni\u0165 jej do po\u017eadovan\u00e9ho rozl\u00ed\u0161enia. V pr\u00edpade, \u017ee kamera pracuje s n\u00edzkym rozl\u00ed\u0161en\u00edm, tak nast\u00e1va probl\u00e9m a obraz je digit\u00e1lne zv\u00e4\u010d\u0161enie, Co\u017e vede k zhor\u0161eniu kvality videa. U kamier s vysok\u00fdm rozl\u00ed\u0161en\u00edm je toto zhor\u0161enie kvality eliminovan\u00e1 &#8211; po\u017eadujeme chcete nahr\u00e1vanie vo 1080p rozl\u00ed\u0161en\u00ed, tak kamera jednoducho vykon\u00e1 orez z rozl\u00ed\u0161enia vy\u0161\u0161ieho a to bez straty kvality.<\/p>\n<p id=\"epoe\"><strong>ePoE<\/strong><br \/>\nPri vyu\u017eit\u00ed kamier a switchov podporuj\u00facich\u00a0funkciu ePoE je mo\u017en\u00e9 nap\u00e1ja\u0165 kameru po UTP k\u00e1blu a prij\u00edma\u0165 z nej d\u00e1ta na vzdialenos\u0165 a\u017e 800 metrov. Pri tejto vzdialenosti je mo\u017en\u00e9 pren\u00e1\u0161a\u0165 a\u017e 10 Mbps d\u00e1t. Do vzdialenosti 300 metrov je mo\u017en\u00e9 kamery nap\u00e1ja\u0165 \u0161tandardom PoE+ a prenosov\u00e1 r\u00fdchlos\u0165 dosahuje 100 Mbps.<\/p>\n<p id=\"fisheye\"><strong>Fisheye \/ Rybie oko<\/strong><br \/>\nJe typ \u0161irokouhl\u00e9ho objekt\u00edvu, ktor\u00e9ho \u0161o\u0161ovka m\u00e1 z\u00e1ber s ve\u013emi \u0161irok\u00fdm uhlom. Objekt\u00edvy tohto typu m\u00f4\u017eu zobrazi\u0165 naraz uhol a\u017e 180\u00b0. Tento objekt\u00edv bol p\u00f4vodne vyvinut\u00fd pre vyu\u017eitie v meteorol\u00f3gii pre \u0161t\u00fadium oblak. Rybie oko sa stalo ve\u013emi popul\u00e1rne aj v \u010fal\u0161\u00edch oblastiach \u2013 medzi ne patr\u00ed aj CCTV.<\/p>\n<p id=\"full_hd\"><strong>FULL HD<\/strong><br \/>\nMoment\u00e1lne najpou\u017e\u00edvanej\u0161ie rozl\u00ed\u0161enie pri IP kamer\u00e1ch z d\u00f4vodu komer\u010dn\u00e9ho \u00faspechu Full HD rozl\u00ed\u0161enia. Ide o kamery s rozl\u00ed\u0161en\u00edm 1920 x 1080 pixelov \u010do predstavuje rozl\u00ed\u0161enie 2,1 Mpx. S t\u00fdmto rozl\u00ed\u0161en\u00edm je u\u017e mo\u017en\u00e9 kamery umiestni\u0165 aj do prostredia, kde je nutn\u00e9 sledova\u0165 detaily a z\u00e1kazn\u00edk chce vyu\u017e\u00edva\u0165 digit\u00e1lny zoom. V pr\u00edpade zapojenia Full HD kamery do monitora s Full HD rozl\u00ed\u0161en\u00edm a zobrazen\u00edm na celomonitorov\u00e9 zobrazenie (Fullscreen) je obraz zobrazen\u00fd presne 1:1 bez ak\u00fdchko\u013evek deform\u00e1ci\u00ed obrazu.<\/p>\n<p id=\"hd\"><strong>HD (High Definition)<\/strong><br \/>\nJe skratka pre High Definition rozl\u00ed\u0161enie, ktor\u00e9 je 1280 x 720 pixelov. Toto rozl\u00ed\u0161enie je v pomere str\u00e1n 16:9. Ve\u013ea v\u00fdrobcov IP kamier umo\u017e\u0148uje prepn\u00fa\u0165 kameru na pomer str\u00e1n 4:3, kde horizont\u00e1lne rozl\u00ed\u0161enie zost\u00e1va rovnak\u00e9, ale vertik\u00e1lne je zv\u00e4\u010d\u0161en\u00e9. Napr\u00edklad pri Sony HD kamer\u00e1ch je mo\u017en\u00e9 namiesto rozl\u00ed\u0161enia HD spravi\u0165 z kamery 1,3 Mpx kameru.<\/p>\n<p id=\"hdcvi\"><strong><a id=\"hdcvi\" name=\"hdcvi\"><\/a>HDCVI (High Definition Composite Video Interface)<\/strong><br \/>\nTechnol\u00f3gia vyvinut\u00e1 spolo\u010dnos\u0165ou Dahua, ktor\u00e1 na prenos sign\u00e1lu vyu\u017e\u00edva koaxi\u00e1lny k\u00e1bel. V\u010faka tomu mo\u017eno HDCVI syst\u00e9mom nahradi\u0165 star\u0161\u00ed anal\u00f3gov\u00fd syst\u00e9m bez nutnosti in\u0161tal\u00e1cie novej UTP kabel\u00e1\u017ee a vyu\u017ei\u0165 tak existuj\u00face rozvody (pri pou\u017eit\u00ed vhodn\u00e9ho prevodn\u00edka mo\u017eno pou\u017ei\u0165 aj UTP kabel\u00e1\u017e). Standard HDCVI umo\u017e\u0148uje prenos obrazu v rozl\u00ed\u0161en\u00ed a\u017e 4K (Ultra HD), audio sign\u00e1lu a d\u00e1tov\u00e9ho sign\u00e1lu pre ovl\u00e1danie PTZ kamery. Nech\u00fdba ani mo\u017enos\u0165 prenosu nap\u00e1jania (<a href=\"https:\/\/www.tssgroup.sk\/podpora\/podpora-zabezpecenie-objektov\/faq\/technicke-pojmy#poc\">PoC<\/a>).<\/p>\n<p id=\"hlc\"><strong><a id=\"HLC\"><\/a>HLC (Highlight Compensation)<\/strong><br \/>\nT\u00e1to funkcia je ur\u010den\u00e1 pre kompenz\u00e1ciu v\u00fdrazn\u00fdch bodov\u00fdch zdrojov svetla s vysok\u00fdm jasom. Kona\u0165 sa m\u00f4\u017ee napr\u00edklad o svetlomety automobilov, lampy pouli\u010dn\u00e9ho osvetlenia a pod.<\/p>\n<p id=\"hybrid\"><strong>Hybrid z\u00e1znam<\/strong><br \/>\nZ\u00e1znam \u2013 z\u00e1znamov\u00e9 zariadenia ozna\u010den\u00e9 ako hybridn\u00e9 s\u00fa ur\u010den\u00e9 na nahr\u00e1vanie IP kamier a z\u00e1rove\u0148 aj anal\u00f3gov\u00fdch kamier. R\u00f4zni v\u00fdrobcovia pou\u017e\u00edvaj\u00fa r\u00f4zne sp\u00f4soby hybridn\u00fdch vide\u00ed. Napr\u00edklad Aver d\u00e1va pri 4 kan\u00e1lovom hybridnom DVR mo\u017enos\u0165 nahr\u00e1va\u0165 v\u017edy \u013eubovo\u013en\u00fa kombin\u00e1ciu 4 kamier anal\u00f3g \/ IP. Hybridn\u00e9 syst\u00e9my od v\u00fdrobcu Dahua s\u00fa rie\u0161en\u00e9 in\u00fdm sp\u00f4sobom &#8211; polovica anal\u00f3g, polovica IP. 8 kan\u00e1lov\u00e9 hybridn\u00e9 DVR Dahua m\u00e1 mo\u017enos\u0165 pripoji\u0165 maxim\u00e1lne 4 anal\u00f3gov\u00e9 kamery a 4 IP kamery.<\/p>\n<p id=\"ik10\"><strong>IK 10 (Antivandal)<\/strong><br \/>\nIde o klasifik\u00e1cii stup\u0148a ochrany poskytovanej kryty elektrick\u00fdch zariaden\u00ed proti vonkaj\u0161\u00edm mechanick\u00fdm n\u00e1razom. Jeden\u00e1s\u0165 \u00farovn\u00ed tejto odolnosti stanovuje medzin\u00e1rodn\u00e1 norma IEC 62262. Zariadenie so stup\u0148om ochrany IK 10 odol\u00e1 n\u00e1razu s kinetickou energiou 20 J (ekvivalent: vplyv telesa s hmotnos\u0165ou 5 kg z v\u00fd\u0161ky 40 cm).<\/p>\n<p id=\"ip-kamery\"><strong>IP kamery<\/strong><br \/>\nIP kamery na rozdiel od anal\u00f3gov\u00fdch kamier maj\u00fa v\u00fdhodu v obojsmernej komunik\u00e1cii na protokole TCP\/IP. V\u010faka tomu je mo\u017en\u00e9 na prenos obrazu IP kamier pou\u017ei\u0165 existuj\u00facu kabel\u00e1\u017e. Najv\u00e4\u010d\u0161ou v\u00fdhodou IP kamier je, \u017ee nie s\u00fa \u017eiadne limity na maxim\u00e1lne rozl\u00ed\u0161enie, ktor\u00e9 by IP kamera mala. V pr\u00edpade anal\u00f3gu je dan\u00e1 norma PAL, ktor\u00e1 ma svoj limit na 0,4 Mpx. V pr\u00edpade IP kamier m\u00e1me moment\u00e1lne v ponuke kameru s rozl\u00ed\u0161en\u00edm 29 Mpx, \u010do je najv\u00e4\u010d\u0161ie rozl\u00ed\u0161enie na svete v pr\u00edpade progres\u00edvneho skenovania, ale aj t\u00e1to kamera bude isto v bud\u00facnosti nahraden\u00e1 kamerou s vy\u0161\u0161\u00edm rozl\u00ed\u0161en\u00edm. IP kamery m\u00f4\u017eu ma\u0165 r\u00f4zne inteligentn\u00e9 funkcie ako rozpozn\u00e1vanie E\u010cV, rozpozn\u00e1vanie tv\u00e1re, vyhodnocovanie pohybu at\u010f.<\/p>\n<p id=\"ip-zaznam\"><strong>IP z\u00e1znam<\/strong><br \/>\nPre r\u00f4zne softv\u00e9ry treba d\u00e1va\u0165 pozor na kompatibilitu medzi jednotliv\u00fdmi softv\u00e9rmi a kamerami. Zvy\u010dajne ka\u017ed\u00fd v\u00fdrobca m\u00e1 okrem svojich IP kamier aj svoj vlastn\u00fd softv\u00e9r. V\u00fdhodou b\u00fdva, \u017ee ve\u013eakr\u00e1t v\u00fdrobcovia pre svoje kamery d\u00e1vaj\u00fa bezplatn\u00e9 verzie softv\u00e9rov s ur\u010dit\u00fdmi obmedzeniami. Takto napr\u00edklad Sony m\u00e1 rie\u0161enie pre nahr\u00e1vanie 9 Sony kamier, Aver pre nahr\u00e1vanie 32 Aver kamier, CNB pre 32 CNB kamier.<\/p>\n<p id=\"ir\"><strong>IR<\/strong><br \/>\nInfra\u010derven\u00e9 svetlo \u2013 svetlo na ni\u017e\u0161\u00edch frekvenci\u00e1ch (850 alebo 950 nm) ako vidite\u013en\u00e9 svetlo. Sl\u00fa\u017ei na no\u010dn\u00e9 prisvietenie sn\u00edman\u00fdch priestorov. Pre \u013eudsk\u00e9 oko je prakticky nevidite\u013en\u00e9.\u00a0V pr\u00edpade IR svetla 850 nm je vidie\u0165 \u010derven\u00e9 LED di\u00f3dy pri priamom sledovan\u00ed na IR pr\u00edsvit. Na rozdiel od 850 nm s\u00fa LED pr\u00edsvity s 950 nm charakterizovan\u00e9 men\u0161\u00edm v\u00fdkonom a t\u00fdm aj men\u0161\u00edm uh\u013eom pr\u00edsvitu. Na ko\u013eko s\u00fa 950 nm IR LED menej vyu\u017e\u00edvan\u00e9, tak je ich cena vy\u0161\u0161ia ako cena pre 850 nm. \u010eal\u0161\u00ed rozdiel je, \u017ee pri priamom poh\u013eade do IR pr\u00edsvitu 950 nm, nie je vidie\u0165 ani len \u010derven\u00e9 LED.<\/p>\n<p id=\"lightcatcher\"><strong>LightCatcher<\/strong><br \/>\nJe \u0161peci\u00e1lna technol\u00f3gia, ktor\u00e1 umo\u017e\u0148uje kamere vidiet vo farbe aj pri ve\u013emi zl\u00fdch sveteln\u00fdch podmienkach. Je vhodn\u00e1 pre pou\u017eitie v re\u0161taur\u00e1ciach, hoteloch, recepci\u00e1ch a kancel\u00e1riach.<\/p>\n<p id=\"onvif\"><strong>ONVIF<\/strong><br \/>\nOrganiz\u00e1cia zalo\u017een\u00e1 Sony, Bosch a Axis, ktor\u00e1 zjednocuje video \u0161tandard a prekon\u00e1va tak najv\u00e4\u010d\u0161iu nev\u00fdhodu IP kamier a to kompatibilitu. V pr\u00edpade Onvifu existuje viacero verzi\u00ed a samozrejme z\u00e1vis\u00ed od konkr\u00e9tneho v\u00fdrobcu, ktor\u00fa verziu pou\u017eije. V r\u00e1mci implement\u00e1cie je e\u0161te d\u00f4le\u017eit\u00e9, ktor\u00e9 funkcie z kamier s\u00fa zaintegrovan\u00e9 aj do Onvifu, a ktor\u00e9 bude mo\u017en\u00e9 vyu\u017e\u00edva\u0165 len vr\u00e1mci origin\u00e1lneho protokolu v\u00fdrobcu.<\/p>\n<p id=\"osd\"><strong>OSD<\/strong><br \/>\nJe menu v obraze, kde je mo\u017en\u00e9 nastavova\u0165 parametre kamery. Menu sa zobrazuje priamo v obraze z kamery. Ovl\u00e1danie menu je bu\u010f priamo na kamere cez joystick alebo tla\u010didl\u00e1.\u00a0Druh\u00e1 mo\u017enos\u0165 na lep\u0161\u00edch kamer\u00e1ch je cez RS485. V pr\u00edpade nastavovania OSD priamo na kamere je potrebn\u00fd servisn\u00fd monitor na nastavovanie.<\/p>\n<p id=\"poc\"><strong><a id=\"poc\" name=\"poc\"><\/a>PoC (Power over Coax)<\/strong><br \/>\nTechnol\u00f3gia od spolo\u010dnosti Dahua, ur\u010den\u00e1 pre <a href=\"https:\/\/www.tssgroup.sk\/podpora\/podpora-zabezpecenie-objektov\/faq\/technicke-pojmy#hdcvi\">HDCVI<\/a> syst\u00e9my, ktor\u00e1 umo\u017e\u0148uje prenos videosign\u00e1lu, nap\u00e1janie a riadiaceho sign\u00e1lu prostredn\u00edctvom koaxi\u00e1lneho k\u00e1bla a\u017e do vzdialenosti 400 m. V\u010faka tomu odpad\u00e1 nutnos\u0165 in\u0161tal\u00e1cie \u010fal\u0161\u00edch zdrojov nap\u00e1jania, doch\u00e1dza k zjednodu\u0161eniu in\u0161tal\u00e1cie, zn\u00ed\u017eenie n\u00e1kladov a na odstr\u00e1nenie pr\u00edpadn\u00fdch ru\u0161iv\u00fdch vplyvov vonkaj\u0161\u00edch zdrojov nap\u00e1jania na kvalitu obrazu.<\/p>\n<p id=\"poe\"><strong>PoE (Power over Ethernet)<\/strong><br \/>\nPower Over Ethernet \u2013 nap\u00e1janie po ethernetovom k\u00e1bli. V pr\u00edpade IP kamier sa ve\u013emi \u010dasto vyu\u017e\u00edva nap\u00e1janie po d\u00e1tovom k\u00e1bli, kde jedn\u00fdm k\u00e1blom te\u010d\u00fa aj TCP\/IP d\u00e1ta a z\u00e1rove\u0148 aj nap\u00e1janie. To je \u0161pecifikovan\u00e9 medzin\u00e1rodn\u00fdm \u0161tandardom IEEE 802.3af. Tento \u0161tandard ud\u00e1va nap\u00e4tie 48 V DC pri pr\u00edkone 15,4 W. Dan\u00fd pr\u00edkon je pre oto\u010dn\u00e9 kamery u\u017e neposta\u010duj\u00faci a tak vznikol nov\u00fd \u0161tandard a to IEEE 802.3at, kde je nap\u00e4tie st\u00e1le 48 V DC, ale pr\u00edkon je u\u017e 30 W. V obidvoch pr\u00edpadoch sa bav\u00edme o akt\u00edvnom POE, \u010di\u017ee kamera (alebo in\u00e9 POE zariadenie) si vyp\u00fdta nap\u00e1janie a dostane ho. V pr\u00edpade zapojenia ne-POE zariadenia (notebook, po\u010d\u00edta\u010d) do POE portu sa ni\u010d nestane nako\u013eko switch pust\u00ed POE iba v pr\u00edpade POE zariadenia. Okrem akt\u00edvneho POE existuje aj verzia pas\u00edvneho POE, kde sa jedn\u00e1 len o vyu\u017eitie neakt\u00edvnych \u017e\u00edl na UTP k\u00e1bli \u2013 na 10\/100 Mbps sie\u0165 sa vyu\u017e\u00edvaj\u00fa len 2 zo 4 p\u00e1rov.<\/p>\n<p id=\"ptz\"><strong>PTZ (Pan | Tilt | Zoom)<\/strong><br \/>\nJedn\u00e1 sa o kateg\u00f3riu kamier, u ktor\u00fdch m\u00e1 obsluha mo\u017enos\u0165 ovl\u00e1da\u0165 poz\u00edciu objekt\u00edvu v horizont\u00e1lnej a vertik\u00e1lnej osi s\u00fa\u010dasne so zmenou \u00farovne optick\u00e9ho zoomu. PTZ kamery m\u00f4\u017eu by\u0165 vybaven\u00e9 \u0161pecifick\u00fdmi funkciami ako s\u00fa napr\u00edklad Auto tracking &#8211; sledovanie pohybuj\u00facich sa objektov, Pattern &#8211; objekt\u00edv sa pohybuje po preddefinovan\u00e9 trase, Scan (Swing) &#8211; prechod medzi dvoma bodmi, Preset &#8211; preddefinovan\u00e9 poz\u00edcie objekt\u00edvu a \u010fal\u0161ie funkcie vr\u00e1tane mo\u017enosti ich vz\u00e1jomn\u00e9ho kombinovania.<\/p>\n<p id=\"roi\"><strong>ROI (Region of Interests)<\/strong><br \/>\nV\u010faka tejto funkcii doch\u00e1dza k optimaliz\u00e1cii mno\u017estva spracov\u00e1van\u00fdch, pren\u00e1\u0161an\u00fdch a n\u00e1sledne ukladan\u00fdch d\u00e1t, preto\u017ee s\u00fa spracov\u00e1van\u00e9 len u\u017e\u00edvate\u013eom vybran\u00e9 \u010dasti sn\u00edman\u00e9ho obrazu. Pr\u00ednosom pre u\u017e\u00edvate\u013eov je zn\u00ed\u017eenie n\u00e1rokov na priepustnos\u0165 d\u00e1t prenosov\u00fdch kan\u00e1lov a kapacitu \u00falo\u017eiska.<\/p>\n<p id=\"rs232\"><strong>RS-232<\/strong><br \/>\n\u0160tandard pre s\u00e9riov\u00fa komunik\u00e1ciu medzi elektronick\u00fdmi pr\u00edstrojmi.<\/p>\n<p id=\"rs485\"><strong>RS-485<\/strong><br \/>\n\u0160tandard pre s\u00e9riov\u00fa komunik\u00e1ciu medzi elektronick\u00fdmi pr\u00edstrojmi. Vych\u00e1dza zo svojho predchodcu RS-232, ale na rozdiel od neho umo\u017e\u0148uje napr\u00edklad vytvorenie zbernicovej topol\u00f3gie.<\/p>\n<p id=\"sense-up\"><strong>Sense up<\/strong><br \/>\nPomal\u00e1 uz\u00e1vierka. Ve\u013eakr\u00e1t je ozna\u010dovan\u00e1 t\u00e1to funkcia ako DSS &#8211; Digital Slow Shutter. Sense-up\u00a0zvy\u0161uje \u010das uz\u00e1vierky, \u010do sp\u00f4sobuje viac svetla dopadaj\u00faceho na senzor kamery. Nev\u00fdhodou tejto funkcie je, \u017ee ve\u013ek\u00fd \u010das uz\u00e1vierky sp\u00f4sobuje rozmazanie pohybuj\u00facich sa objektov v tme. Preto je zvy\u010dajne mo\u017en\u00e9 nastavi\u0165 hodnotu DSS, aby sa dalo pre \u0161pecifick\u00e9 prostredie nastavi\u0165 hodnota presne pod\u013ea po\u017eiadaviek.<\/p>\n<p id=\"ssa\"><strong>SSA<\/strong><br \/>\nJedn\u00e1 sa o jednu z funkci\u00ed, ktor\u00e9 sl\u00fa\u017eia k automatickej kompenz\u00e1cii protisvetla zmenou expoz\u00edcie tak, aby boli objekty na sc\u00e9ne \u010do najlep\u0161ie rozoznate\u013en\u00e9. Zjednodu\u0161ene sa jedn\u00e1 o automatick\u00e9 zni\u017eovanie jasu v oblastiach obrazu s vysok\u00fdm jasom (svetla automobilu alebo semaforov v tme) a zvy\u0161ovanie jasu v oblastiach s n\u00edzkym jasom.<\/p>\n<p id=\"starlight\"><strong>Starlight a Full-color Starlight<\/strong><br \/>\nKamery vybaven\u00e9 funkciou Starlight dosahuj\u00fa farebnej citlivosti v r\u00e1doch stot\u00edn a\u017e tis\u00edcin luxu. V\u010faka tomu s\u00fa schopn\u00e9 ve\u013emi spo\u013eahlivo rozpozna\u0165 farby aj v podmienkach, pri ktor\u00fdch be\u017en\u00e9 kamery prech\u00e1dzaj\u00fa do no\u010dn\u00e9ho, monochromatick\u00e9ho, re\u017eimu. V porovnan\u00ed s kamerami so \u0161tandardn\u00fdm \u010dipom je zachovan\u00e1 ove\u013ea \u0161ir\u0161\u00ed obrazov\u00e1 inform\u00e1cia. Aktu\u00e1lne rozli\u0161ujeme <strong>Starlight<\/strong> (hrani\u010dn\u00e1 intenzita osvetlenia 0,01 lx pre objekt\u00edv F1.4) a pokro\u010dilej\u0161\u00ed <strong>Full-color Starlight<\/strong> (hrani\u010dn\u00e1 intenzita osvetlenia 0,001 lx pre ve\u013emi sveteln\u00fd objekt\u00edv F1.0).<\/p>\n<p><strong>V pr\u00edpade Full-color Starlight m\u00e1 u\u017e\u00edvate\u013e k dispoz\u00edcii farebn\u00fd obraz nepretr\u017eite.<\/strong><\/p>\n<p id=\"svetelnostobjektivu\"><strong>Svetelnos\u0165 objekt\u00edvu<\/strong><br \/>\nHodnota svetelnosti objekt\u00edvu ud\u00e1va mieru \u00fatlmu pre prech\u00e1dzaj\u00faceho svetla, charakterizuje teda rozdiel medzi mno\u017estvom svetla vstupuj\u00facim do a vystupuj\u00facim z optickej s\u00fastavy objekt\u00edvu. V\u0161eobecne plat\u00ed, \u017ee \u010d\u00edm ni\u017e\u0161ia je hodnota svetelnosti objekt\u00edvu, t\u00fdm lep\u0161ie a jeho \u00fa\u017eitkov\u00e1 hodnota v praxi je vy\u0161\u0161ia.<\/p>\n<p id=\"ultrawdr\"><strong>Ultra WDR (Ultra Wide Dynamic Range)<\/strong><br \/>\nN\u00e1stroj pre kompenz\u00e1ciu protisvetla vych\u00e1dzaj\u00face z technol\u00f3gie WDR, ktor\u00fd vyu\u017e\u00edva zlo\u017eenie obrazov z\u00edskan\u00fdch pri vysokej a pri n\u00edzkej r\u00fdchlosti uz\u00e1vierky. Na rozdiel od nej v\u0161ak nepracuje s p\u0159eexponovan\u00fdmi a podexponovan\u00fdmi plochami, ale jednotliv\u00fdmi pixely, v\u010faka \u010domu dosahuje v\u00fdrazne lep\u0161\u00edch v\u00fdsledkov v kvalite v\u00fdsledn\u00e9ho obrazu.<\/p>\n<p id=\"varifokalnyobjektiv\"><strong>Varifok\u00e1lny objekt\u00edv<\/strong><br \/>\nTyp objekt\u00edvu umo\u017e\u0148uj\u00faci ru\u010dn\u00e9 nastavenie ohniskovej vzdialenosti pod\u013ea po\u017eiadaviek pou\u017e\u00edvate\u013ea (manu\u00e1lny zoom).<\/p>\n<p id=\"videoanalyza\"><strong>Videoanalytick\u00e9 funkcie<\/strong><br \/>\nMnoh\u00e9 typy kamier, ale aj z\u00e1znamov\u00fdch zariaden\u00ed, pon\u00faka svojim u\u017e\u00edvate\u013eom roz\u0161iruj\u00face funkcie, ktor\u00e9 prin\u00e1\u0161aj\u00fa \u0161irok\u00fa paletu detek\u010dn\u00fdch alebo \u0161tatistick\u00fdch funkci\u00ed. Tieto funkcie napr\u00edklad umo\u017e\u0148uj\u00fa str\u00e1\u017eenia prekro\u010denie stanoven\u00fdch hran\u00edc \/ l\u00edni\u00ed, detekciu obsadenie stanoven\u00fdch pl\u00f4ch, odobratie sledovan\u00e9ho predmetu zo z\u00e1beru kamery, anonymiz\u00e1ciu tzv. priv\u00e1tnych z\u00f3n, kvantitat\u00edvnej anal\u00fdzy pohybu os\u00f4b. Niektor\u00e9 typy kamier s\u00fa vybaven\u00e9 aj samou\u010diacim sa algoritmy. V s\u00favislosti s implement\u00e1ciou t\u00fdchto funkci\u00ed b\u00fdva dostupn\u00fd tie\u017e tzv. alarmov\u00fd v\u00fdstup.<\/p>\n<p id=\"wdr\"><strong>WDR (Wide Dynamic Range)<\/strong><br \/>\nKompenz\u00e1cia protisvetla. Pou\u017e\u00edva sa pri ve\u013ekom kontraste sn\u00edman\u00e9ho priestoru, kde s\u00fa naraz\u00a0v obraze svetl\u00e9 aj tmav\u00e9 plochy. Je viacero sp\u00f4sobov ak\u00fdm v\u00fdrobcovia implementuj\u00fa technol\u00f3giu WDR do kamier. Naj\u010dastej\u0161ie ide o \u0161peci\u00e1lny algoritmus v\u00fdpo\u010dtu, ktor\u00fd vych\u00e1dza z dvoch sn\u00edmok, pri\u010dom jedna sn\u00edmka je uroben\u00e1 pri r\u00fdchlej uz\u00e1vierke a jedna pri pomalej uz\u00e1vierke. N\u00e1sledne doch\u00e1dza ku spracovan\u00ed oboch obrazov a vyhodnoten\u00ed tmav\u00fdch a svetl\u00fdch pl\u00f4ch.<\/p>\n<p id=\"zoom\"><strong>ZOOM<\/strong><br \/>\nPribl\u00ed\u017eenie m\u00f4\u017ee by\u0165 bu\u010f optick\u00e9 alebo digit\u00e1lne. V pr\u00edpade optick\u00e9ho zoomu je re\u00e1lne menen\u00e1 ohniskov\u00e1 vzdialenos\u0165. Ovl\u00e1danie optick\u00e9ho zoomu je v pr\u00edpade anal\u00f3gov\u00fdch kamier cez RS485 a v pr\u00edpade IP kamier cez dan\u00fd komunika\u010dn\u00fd protokol v\u00fdrobcu. Optick\u00fd zoom je mo\u017en\u00e9 vyu\u017ei\u0165 len v pr\u00edpade \u017eiv\u00e9ho obrazu. Digit\u00e1lny zoom je len digit\u00e1lne spracovanie obrazu, ktor\u00e9 je mo\u017en\u00e9 vyu\u017ei\u0165 ako v \u017eivom obraze, tak aj v z\u00e1zname s t\u00fdm, \u017ee v pr\u00edpade vyu\u017eitia digit\u00e1lneho zoomu je st\u00e1le nahr\u00e1van\u00e1 cel\u00e1 \u010das\u0165 obrazu. Digit\u00e1lny zoom je mo\u017en\u00e9 vyu\u017ei\u0165 na IP kamer\u00e1ch. Samozrejme vo ve\u013emi obmedzenej miere je mo\u017en\u00e9 pou\u017ei\u0165 digit\u00e1lny zoom aj pre anal\u00f3gov\u00e9 kamery, ale nako\u013eko maxim\u00e1lne rozl\u00ed\u0161enie anal\u00f3gu je 720 x 576 riadkov, tak digit\u00e1lny zoom ve\u013emi \u201eskockavie\u201c obraz.<\/p>\n<h3><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Pojmy ktor\u00e9 V\u00e1m pom\u00f4\u017eu pri v\u00fdbere kamery. do 1 Mpx Kamery s rozl\u00ed\u0161en\u00edm do jedn\u00e9ho megapixelu s\u00fa v\u0161etky anal\u00f3gov\u00e9 kamery ako aj IP kamery s rozl\u00ed\u0161en\u00edm HD Ready (1280 x &#8230;<\/p>\n","protected":false},"author":2,"featured_media":1632,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[7],"tags":[9,12,14,15,17],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - 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