{"id":1049,"date":"2023-03-27T00:38:09","date_gmt":"2023-03-26T21:38:09","guid":{"rendered":"https:\/\/legendhomework.com\/tr\/?p=1049"},"modified":"2023-03-27T00:38:09","modified_gmt":"2023-03-26T21:38:09","slug":"dizin-modeli-multimedya-bolumu-multimedya-bolumu-odevleri-multimedya-bolumu-tez-yaptirma-multimedya-bolumu-odev-ucretleri","status":"publish","type":"post","link":"https:\/\/legendhomework.com\/tr\/dizin-modeli-multimedya-bolumu-multimedya-bolumu-odevleri-multimedya-bolumu-tez-yaptirma-multimedya-bolumu-odev-ucretleri\/","title":{"rendered":"Dizin Modeli \u2013 Multimedya B\u00f6l\u00fcm\u00fc \u2013 Multimedya B\u00f6l\u00fcm\u00fc \u00d6devleri \u2013 Multimedya B\u00f6l\u00fcm\u00fc Tez Yapt\u0131rma \u2013Multimedya B\u00f6l\u00fcm\u00fc \u00d6dev \u00dccretleri"},"content":{"rendered":"

Dizin Modeli<\/span><\/strong><\/h3>\n

Ayd\u0131nlatma modeli, ger\u00e7ek d\u00fcnyan\u0131n de\u011fi\u015fen ayd\u0131nlatmas\u0131n\u0131n neden oldu\u011fu video dizisindeki zamansal de\u011fi\u015fiklikleri tan\u0131mlar. Bir \u0131\u015f\u0131k kayna\u011f\u0131ndan gelen \u0131\u015f\u0131\u011f\u0131n bir nesnenin P noktas\u0131yla etkile\u015fimi, gelen \u0131\u015f\u0131n\u0131m\u0131n Ei,\u03bb da\u011f\u0131l\u0131m\u0131na ve nesne y\u00fczeyi yans\u0131tma fonksiyonu R’ye ba\u011fl\u0131 olarak bir nesne y\u00fczeyinden yans\u0131yan parlakl\u0131\u011f\u0131n Lr,\u03bb da\u011f\u0131l\u0131m\u0131 ile tan\u0131mlan\u0131r.<\/span><\/p>\n

Sahnenin bir nokta \u0131\u015f\u0131k kayna\u011f\u0131 ve ortamdaki da\u011f\u0131n\u0131k \u0131\u015f\u0131k taraf\u0131ndan ayd\u0131nlat\u0131laca\u011f\u0131n\u0131 varsaymak, erken bilgisayar grafiklerinde kullan\u0131lan Phong’un g\u00f6lgelendirme modeline olay \u0131\u015f\u0131n\u0131m\u0131n\u0131n a\u00e7\u0131klamas\u0131n\u0131 basitle\u015ftirir.<\/span><\/p>\n

Cambient ile ortam \u0131\u015f\u0131mas\u0131 ve t\u0131rman\u0131\u015f noktas\u0131 \u0131\u015f\u0131k kayna\u011f\u0131 \u0131\u015f\u0131mas\u0131. N’nin ve dolay\u0131s\u0131yla nesne \u015feklinin bilindi\u011fini varsayarsak, bu basit ayd\u0131nlatma modelinin tahmin edilmesi i\u00e7in \u00fc\u00e7 parametre gerekir: ortam ve do\u011frudan \u0131\u015f\u0131n\u0131m aras\u0131ndaki oran, kambient\/t\u0131rmanma ve do\u011frudan noktasal \u0131\u015f\u0131k kayna\u011f\u0131 \u0131\u015f\u0131n\u0131m\u0131n\u0131n y\u00f6n\u00fcn\u00fc tan\u0131mlayan iki a\u00e7\u0131.<\/span><\/p>\n

(10.5)’e g\u00f6re bu model, Stauder taraf\u0131ndan bir OBASC’de uygulanm\u0131\u015ft\u0131r. G\u00f6r\u00fcnt\u00fc d\u00fczleminde, Stander, pk’den pk+1’e hareket eden bir noktan\u0131n parlakl\u0131\u011f\u0131n\u0131n l(p)’nin buna g\u00f6re de\u011fi\u015fti\u011fini varsayar.<\/span><\/p>\n

Pearson ve di\u011ferleri, \u0131\u015f\u0131may\u0131 ayr\u0131 bir \u0131\u015f\u0131ma haritas\u0131yla modellemeyi \u00f6nerdiler [55]. Bu harita, bir Gauss k\u00fcresi \u00fczerindeki gelen \u0131\u015f\u0131\u011f\u0131n her par\u00e7as\u0131 i\u00e7in bir \u0131\u015f\u0131n\u0131m de\u011feri verir. Herhangi bir ayd\u0131nlatma durumuyla s\u0131n\u0131rl\u0131 de\u011fildir. Birka\u00e7 \u0131\u015f\u0131k kayna\u011f\u0131 kullan\u0131labilir. Bir ayd\u0131nlatma durumunun makul bir tahmini i\u00e7in yama say\u0131s\u0131 9 \u00d7 9 veya daha y\u00fcksek olmal\u0131d\u0131r. Bu y\u00f6ntem, \u00f6zellikle \u0131\u015f\u0131n\u0131m de\u011ferleri \u00f6l\u00e7\u00fclebiliyorsa kullan\u0131\u015fl\u0131d\u0131r.<\/span><\/p>\n

Ba\u015fka bir basit ayd\u0131nlatma modeli, g\u00f6r\u00fcnt\u00fc sinyali l(p)’nin ayd\u0131nlatma E(p)’ye ve \u00e7ift y\u00f6nl\u00fc yans\u0131ma fonksiyonu R(p)’ye ba\u011fl\u0131 oldu\u011funu varsayar. R(p), ayd\u0131nlatman\u0131n dalga boyunu, y\u00fczey malzemesini ve ayd\u0131nlatma, kamera ve y\u00fczeyin geometrik d\u00fczenlemesini a\u00e7\u0131klar. Ayd\u0131nlatma Ei(p), ortam \u0131\u015f\u0131\u011f\u0131na ve do\u011frudan \u0131\u015f\u0131\u011fa ba\u011fl\u0131d\u0131r. Da\u011f\u0131n\u0131k ayd\u0131nlatma, da\u011f\u0131n\u0131k yans\u0131tan y\u00fczeyler, paralel izd\u00fc\u015f\u00fcm ve sabit bir kb varsay\u0131ld\u0131\u011f\u0131nda, g\u00f6r\u00fcnt\u00fc sinyali yans\u0131ma modeli taraf\u0131ndan verilir.<\/span><\/p>\n

Bu yans\u0131ma modeli, ayd\u0131nlatman\u0131n \u00e7arp\u0131msal bir fakt\u00f6rle modellenebilece\u011fini g\u00f6sterir. Bunun blok e\u015fle\u015ftirme, 3B hareket tahmini ve de\u011fi\u015fiklik alg\u0131lamada yararl\u0131 oldu\u011fu kan\u0131tlanm\u0131\u015ft\u0131r. En basit ama en \u00e7ok kullan\u0131lan ayd\u0131nlatma modeli, basit\u00e7e hareket eden bir noktan\u0131n parlakl\u0131\u011f\u0131n\u0131 varsayar.<\/span><\/p>\n

Bazen bu modele sabit yo\u011funluk varsay\u0131m\u0131 denir. \u00d6rt\u00fck varsay\u0131mlar, da\u011f\u0131n\u0131k ayd\u0131nlatma, da\u011f\u0131n\u0131k yans\u0131tan y\u00fczeyler ve ayd\u0131nlatmada zamansal bir de\u011fi\u015fiklik olmamas\u0131d\u0131r.<\/span><\/p>\n

Nesne Modeli<\/span><\/strong><\/h3>\n

Nesne modeli, kaynak modelin ger\u00e7ek nesneler hakk\u0131ndaki varsay\u0131mlar\u0131n\u0131 a\u00e7\u0131klar. Bunu yapmak i\u00e7in \u015fekil, hareket ve y\u00fczey modelleri gereklidir. Burada a\u00e7\u0131klanan t\u00fcm nesne modelleri ayn\u0131 y\u00fczey modelini kullan\u0131rken, a\u015fa\u011f\u0131da tart\u0131\u015f\u0131ld\u0131\u011f\u0131 gibi farkl\u0131 hareket ve \u015fekil modelleri kullan\u0131rlar.<\/span><\/p>\n

Y\u00fczey modeli s\u00f6z konusu oldu\u011funda, nesne y\u00fczeylerinin opak oldu\u011fu ve da\u011f\u0131n\u0131k bir yans\u0131tma y\u00fczeyine sahip oldu\u011fu varsay\u0131l\u0131r. Bir m nesnesinin y\u00fczeyi, Sm renk parametreleri ile tan\u0131mlan\u0131r. Bu renk parametreleri, parlakl\u0131\u011f\u0131n yan\u0131 s\u0131ra krominans yans\u0131mas\u0131n\u0131 da i\u00e7erir.<\/span><\/p>\n

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Ara\u015ft\u0131rma modeli nedir<\/span>
\nDizin<\/a> \u00f6rne\u011fi<\/span>
\nKitapta dizin \u00f6rne\u011fi<\/span>
\nTarama modeli nedir<\/span>
\nMakalede ara\u015ft\u0131rma modeli nedir<\/span>
\nAra\u015ft\u0131rma modeli \u00f6rne\u011fi<\/span>
\nDizin nedir<\/span>
\nDeneme modeli nedir<\/span><\/p>\n

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Sert 2B Nesneleri (R2D) 3B Hareketle Hareket Ettirme<\/span><\/strong><\/h3>\n

Nesne Modeli<\/span><\/strong><\/p>\n

Bu nesne modeli, sert 2D keyfi \u015fekilli nesneleri varsayar. Bu nedenle, her nesne bir d\u00fczlemin par\u00e7as\u0131 olarak alg\u0131lanabilir. G\u00f6r\u00fcnt\u00fc d\u00fczlemine izd\u00fc\u015f\u00fcm\u00fc, nesnenin 2 boyutlu siluetidir. Her nesnenin 3B alanda hareket etmesine izin verilir.<\/span><\/p>\n

Uzayda d\u00fczlemin y\u00f6n\u00fcn\u00fc a\u00e7\u0131klamak i\u00e7in iki parametreye ve nesne hareketini a\u00e7\u0131klamak i\u00e7in alt\u0131 parametreye izin vererek, g\u00f6r\u00fcnt\u00fc d\u00fczlemine p = (X, Y )T ve p’ = ( olarak yans\u0131t\u0131lan nesne y\u00fczeyindeki bir P noktas\u0131 aras\u0131ndaki i\u015flevsel ili\u015fki. X’, Y’)T hareket \u00f6ncesi ve sonras\u0131 s\u0131ras\u0131yla sekiz parametre ile tan\u0131mlan\u0131r.<\/span><\/p>\n

Uygulama<\/span><\/strong><\/p>\n

Bu kaynak model i\u00e7in g\u00f6r\u00fcnt\u00fc analizi, ba\u015flang\u0131\u00e7ta t\u00fcm \u00e7er\u00e7eve olan sk+1 olan bir nesne i\u00e7in hareketi hiyerar\u015fik olarak tahmin eder. Ard\u0131ndan, nesnenin hareket dengelemeli tahmini s\u02c6, (10.10)’un tersine g\u00f6re sk \u00e7er\u00e7evesinin p noktas\u0131ndan sk+1 \u00e7er\u00e7evesindeki bir p’ noktas\u0131 i\u00e7in parlakl\u0131\u011f\u0131 getiren bir g\u00f6r\u00fcnt\u00fc sentezi algoritmas\u0131 kullan\u0131larak hesaplan\u0131r.<\/span><\/p>\n

Son olarak, tahmin edilen hareket parametreleri, orijinal g\u00f6r\u00fcnt\u00fc ile tahmin edilen g\u00f6r\u00fcnt\u00fc kar\u015f\u0131la\u015ft\u0131r\u0131larak ve hareket parametrelerinin orijinal g\u00f6r\u00fcnt\u00fcn\u00fcn yeterince kesin bir \u015fekilde yak\u0131nla\u015ft\u0131r\u0131lmas\u0131na izin vermedi\u011fi alanlar\u0131n saptanmas\u0131yla do\u011frulan\u0131r. Bu alanlar, hiyerar\u015finin bir sonraki ad\u0131m\u0131nda hareket parametrelerinin tahmin edildi\u011fi nesnelerdir.<\/span><\/p>\n

Bu do\u011frulama ad\u0131m\u0131, hareketi segmentasyon kriteri olarak kullanarak hareketli nesnelerin segmentasyonuna izin verir. Hiyerar\u015finin \u00fc\u00e7 ad\u0131m\u0131 uyguland\u0131. Bu nesne b\u00f6l\u00fctleme ve hareket dengeleme i\u015flemi sonunda hareket parametreleri ile tan\u0131mlanamayan g\u00f6r\u00fcnt\u00fc alanlar\u0131 MFR2D nesneleridir.<\/span><\/p>\n

G\u00fc\u00e7l\u00fc tahminler elde etmek i\u00e7in H\u00f6tter, hareket modelinin parametre say\u0131s\u0131n\u0131 sekizden alt\u0131 (a1 , …, a6 ) parametreli afin bir d\u00f6n\u00fc\u015f\u00fcme veya iki parametreli (a1, a2) bir yer de\u011fi\u015ftirmeye indirmesine izin verdi. Bu adaptasyon \u00f6zellikle nesneler k\u00fc\u00e7\u00fcld\u00fck\u00e7e \u00f6nemlidir.<\/span><\/p>\n

Parametre kodlaman\u0131n, \u00f6zellikle de \u015fekil parametre kodlamas\u0131n\u0131n etkinli\u011fini art\u0131rmak i\u00e7in, mevcut \u00e7er\u00e7evenin hareketli nesnelere b\u00f6l\u00fcnmesi, bir \u00f6nceki g\u00f6r\u00fcnt\u00fcn\u00fcn b\u00f6l\u00fcmlenmesini ba\u015flang\u0131\u00e7 noktas\u0131 olarak al\u0131r. G\u00f6r\u00fcnt\u00fc d\u00fczleminde bu, nesnelerin 2B \u015feklinin zamansal tutarl\u0131l\u0131\u011f\u0131n\u0131 art\u0131r\u0131r.<\/span><\/p>\n

Bir nesnenin g\u00f6r\u00fcn\u00fcr oldu\u011fu her \u00e7er\u00e7eve i\u00e7in sekiz parametre tahmin edildi\u011finden, bu model nesnenin uzaydaki y\u00f6nelimini bir \u00e7er\u00e7eve aral\u0131\u011f\u0131ndan di\u011ferine keyfi olarak de\u011fi\u015ftirmesine izin verir. Nesnenin oryantasyonu i\u00e7in herhangi bir zamansal tutarl\u0131l\u0131k gerekli de\u011fildir veya zorunlu de\u011fildir.<\/span><\/p>\n

2D Motion ile Esnek 2D Nesneleri (F2D) Ta\u015f\u0131ma<\/span><\/strong><\/h3>\n

Bu kaynak model, ger\u00e7ek bir nesnenin hareketinin homojen bir yer de\u011fi\u015ftirme vekt\u00f6r alan\u0131yla tan\u0131mlanabilece\u011fini varsayar. Bu yer de\u011fi\u015ftirme vekt\u00f6r alan\u0131, ger\u00e7ek nesnenin izd\u00fc\u015f\u00fcm\u00fcn\u00fc g\u00f6r\u00fcnt\u00fc d\u00fczlemine yeni konumuna ta\u015f\u0131r. Nesne y\u00fczeyindeki bir P noktas\u0131n\u0131n P’den P’ye hareket etti\u011fini varsayarsak, bunun g\u00f6r\u00fcnt\u00fc d\u00fczlemindeki izd\u00fc\u015f\u00fcm\u00fc p’den p’ye hareket eder. p ve p’, yer de\u011fi\u015ftirme vekt\u00f6r\u00fc D\u20d7(p’) = (DX(p’),DY(p’))T ile ili\u015fkilidir.<\/span><\/p>\n

Bir MC nesnesinin m hareket parametreleri, g\u00f6r\u00fcnt\u00fc d\u00fczlemine m nesnesinin izd\u00fc\u015f\u00fcm\u00fcne ait olan p’ noktalar\u0131n\u0131n yer de\u011fi\u015ftirme vekt\u00f6rleridir. Bu nesnenin \u015fekli, g\u00f6r\u00fcnt\u00fc d\u00fczleminde m nesnesinin izd\u00fc\u015f\u00fcm\u00fcn\u00fc \u00f6zetleyen 2B siluet taraf\u0131ndan tan\u0131mlan\u0131r.<\/span><\/p>\n

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