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undergraduate thesis
Android aplikacija za adaptivno snimanje slika
2016. urn:nbn:hr:168:402905
Sinovčić, Edi
University of Zagreb
Faculty of Electrical Engineering and Computing

Cite this document

Sinovčić, E. (2016). Android aplikacija za adaptivno snimanje slika (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:402905

Sinovčić, Edi. "Android aplikacija za adaptivno snimanje slika." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2016. https://urn.nsk.hr/urn:nbn:hr:168:402905

Sinovčić, Edi. "Android aplikacija za adaptivno snimanje slika." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2016. https://urn.nsk.hr/urn:nbn:hr:168:402905

Sinovčić, E. (2016). 'Android aplikacija za adaptivno snimanje slika', Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 13 April 2025, https://urn.nsk.hr/urn:nbn:hr:168:402905

Sinovčić E. Android aplikacija za adaptivno snimanje slika [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2016 [cited 2025 April 13] Available at: https://urn.nsk.hr/urn:nbn:hr:168:402905

E. Sinovčić, "Android aplikacija za adaptivno snimanje slika", Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:168:402905

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Metadata
TitleAndroid aplikacija za adaptivno snimanje slika
Title (english)Android application for adaptive image recording
AuthorEdi Sinovčić
MentorMarko Subašić (mentor)
Committee memberMarko Subašić (predsjednik povjerenstva)
Committee memberNikola Banić (član povjerenstva)
Committee memberPavle Prentašić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2016-07-11, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Abstract
Camera2 api je moćno oružje za upravljanje kamerama na android uređajima. Iako velikih mogućnosti, ona je i znatno složena što otežava razvoj. Sam api je riješen od strane njegovih stvoritelja kao mnogo povezanih „slušaća“ (listener) koji se asinkrono jedan od drugoga pozivaju kada su za njih preduvjeti stvoreni. Na taj način dobiva se maksimalna iskoristivost resursa čim su oni dostupni. Samo pokretanje kamere kreće od pokretanje slušača za površinu (surface listener), potom kada je on... More dostupan se pokreće sama inicijalizacija kamere. Unutar inicijalizacije kamere se stvaraju slušači CameraDeviceStateCallback sa metodom onOpened koja čeka na otvaranje kamere te CameraCaptureSession za samo hvatanje slike. Sva obrada se odvija na pozadinskoj dretvi da se nebi UI dretva zablokirala radom za hvatanje slike. Bitno je naglasiti da je i korisničko iskustvo ovdje izrazito bitno, jer da imamo kameru koja se „smrzne“ dok slika, te da ne vidimo promjene na ekranu, uopće ne bi vidjeli sliku koja je uhvaćena, nego tek onu nekoliko trenutaka prije, što definitivno nije zadovoljavajuće svojstvo. Još jedna stvar koju je bitno za uzeti u obzir je tromost ljudskog oka te tzv. pravilo 30 sličica u sekundi, odnosno za bolju kvalitetu njih 60. To se smatra minimum u kojem kamera može raditi, te se uz te zahtjeve pokušava dobiti što veća kvaliteta same slike. Less
Abstract (english)
Camera2 api is powerful tool for use on android devices. Although there are big opportunities, that also makes development even harder. The api itself is built like a combination of many listeners which are asynchronously combined, and which call each other when conditions are met. That way we gain maximum usage of resources at the moment when they are ready. Running of the camera itself consists of surface listener which calls initialization of camera when it’s available. Inside... More initialization procedure listener is created for CameraDeviceStateCallback with its method onOpened. The method waits on opening of camera and then CameraCaptureSession catches the pictures. All the processing is done on background thread. That way we are guaranteeing that UI thread is always available for processing GUI events. The user experience is one of the most important things, because if we have camera that freezes when we take a picture, so we can’t see what is happening in the moment at the camera, in the end we would not even see which picture was captured, but the one few moments before, which is definitely not what we want. One more thing that is important to consider is the lack of human eye to see more that 30 frames in second. It’s the minimum that our application has to go to, even more important than the quality of the picture itself. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:402905
Study programmeTitle: Computing
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
Type of resourceText
File originBorn digital
Access conditionsClosed access
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Created on2018-02-06 11:46:53
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