
3dc

3dc (forsisih ati2), jise dxn, beesee5, yaa block sampeedan 5 key roop mein bhee jaanaa jaataa haye, samanya maanchitron key liye ack haani detta sampeedan algorithm haye jiska aavishkaar aur pahali baar ati dwara lagu kiya gayaa thaa. yeh pahale key dee. aiks. tii. 5 algorithm parr adharit haye aur ack khula maanak haye. 3dc abb ati aur envidia donon dwara lagu kiya jaataa haye.
lakshit anuprayog.
lakshya anuprayog, samanya maanchitran, takkar maanchitran kaa ack vistaar haye joe ack aaytaakaar grid seey satah key samanya koo padhkar jyaamitiya satahon parr prakaash kaa anukaran kartaa haye joe ack banaavat maanchitra key anuroop haye-saral model koo badhee hui jatilata kaa aabhas detaa haye. haalaanki yeh atirikt channel graphics system kii memori bandwidth parr bhaar badhaata haye. upabhokta 3dee hardware parr lagu kiye gaye pahale seey maujood haani sampeedan algorithm mein atyadhik drishyamaan kalakritiyon key binaa samanya maanchitron koo punah utpann karane key liye aavashyak sateekta kaa abhaav thaa, joe 3dc key vikas koo uchit thaharaata haye.
algorithm.
satah samanya ikai lambai key tri-ayami vactor hain. lambai kii kamee key kaaran kissy bhee samanya key kewal dou tatvon koo sangraheet karane kii aavashyakta hoti haye. isaliye input dou ayami moolyon kii ack sarani haye.
sampeedan 4 × 4 khandon mein kiya jaataa haye. pratyek khand mein pratyek moolya key dou ghatakon koo alag seey sampeedit kiya jaataa haye. pratyek khand key liye, donon ghatakon mein seey pratyek mein chunane key liye 8 maanon kaa ack pallet hotaa haye. pattikaaen dou maanon seey utpann hoti hain joe ack rekha key praarambh aur anta kaa pratinidhitva karate hain aur anya chhah maan praarambh aur anta moolyon key raikhik sanyojan key roop mein utpann kiye jaa rahey hain.
sampeedan mool roop seey 16 pixel key sabse cumm aur uchchatam maanon koo sampeedit karke aur unamen seey pratyek koo 8-bitt matra key roop mein sangraheet karke praapt kiya jaataa haye. 4 × 4 khand key bheetar alag-alag tatvon koo phir 3-bitt key saath sangraheet kiya jaataa haye, joe sabse cumm moolya seey uchchatam taka 8 charan raikhik paimaane parr unaki sthiti kaa pratinidhitva karate hain. pratyek pixel kaa 3-bitt moolya (pallet soochkaank) mool moolyon seey nyuntam doori key saath pallet pravishti kaa chayan karke chunaa jaayega.
donon srot ghatakon koo ack baar kaarak banaane key baad kull bhandaran 128 bitt prati 4x4 block haye. samaan 8-bitt sateekta key saath ack asankuchit yojana mein, srot detta usee kshetra key liye 32 8-bitt maan haye, joe 256 bitt parr kabja kartaa haye. isaliye algorithm 2:1 sampeedan anupaat utpann kartaa haye.
sampeedan anupaat koo kabhi-kabhi "4:1 taka" key roop mein kahaa jaataa haye kyonki input detta key liye 8-bitt key bajaay 16-bitt parishuddhata kaa upayog karna aam baat haye. yeh sampeedit utpaadan utpann kartaa haye joe vaastav mein input key aakar kaa 1/4 haye lekin yeh tulaniya sateekta kaa naheen haye.
3dc +.
3dc + (chaar seesih ati1) (jise bee. see. 4 yaa block sampeedan 4 key roop mein bhee jaanaa jaataa haye) banaavat koo sampeedit curr sakata haye, i.ee. prakaash maanchitra, chhaaya maanchitra, aich. dee. aar. banaavat aur samagri guna. 3dc + ekal ghatak (dxt5 alfa) 8-bitt purnank banaavat key saath 2:1 sampeedan anupaat aur dou 8-bitt purnank ghatakon seey yukt samanya maanchitron aur banaavat key saath 4:1 sampeedan anupaat pradaan kartaa haye.