5.4.2 PhotoCity

PhotoCity daws cov ntaub ntawv zoo thiab zauv teeb meem nyob rau hauv faib cov ntaub ntawv sau.

Cov websites xws li Flickr thiab Facebook pab kom cov neeg mus muab cov duab nrog lawv cov phooj ywg thiab tsev neeg, tab sis lawv kuj tsim lossis loj repositories ntawm cov duab uas yuav siv tau rau lwm yam hom phiaj. Piv txwv li, Agarwal et al. (2011) npaj siab yuav siv tau cov no cov duab rau "Tsim kom muaj Rome nyob rau hauv ib hnub" los ntawm kev siv 150,000 duab ntawm Rome los ua ib tug 3D reconstruction ntawm lub nroog. Rau neeg mus ncig tebchaws chaw zoo li lub Coliseum muaj txaus cov duab online yuav tsim 3D qauv (Daim duab 5.10), tab sis qhov zoo tshaj ntawm cov reconstructions tau txwv los ntawm qhov tseeb hais tias feem ntau cov duab raug coj los ntawm tib lub iconic kev xaav, tawm hauv feem ntawm lub vaj tse unphotographed. Ntxiv mus, rau ntau qhov chaw ntawm lub nroog, tsis txaus cov duab twb muaj. Yog li, siv lub pom cov ntaub ntawv los ntawm kev yees duab repositories, nws twb tsis tau mus recreate tag nrho ntawm Rome. Tab sis, yog hais tias tuaj pab dawb yuav tsum tau enlisted mus sau cov tsim nyog cov duab tiag tiag "Tsim kom muaj Rome nyob rau hauv ib hnub"?

Daim duab 5,10: A 3-D reconstruction ntawm lub Coliseum los ntawm ib tug loj set ntawm 2-D cov dluab ntawm lub project "tsev Rome nyob rau hauv ib hnub". Lub duab peb ceg sawv cev rau lub chaw uas tus duab raug coj (Agarwal et al. 2011) .

Nyob rau hauv thiaj li yuav pab tau tus tsom sau los ntawm loj tus xov tooj ntawm cov duab, Kathleen Tuite thiab lug txhawb cov miv tsim PhotoCity, ib tug yees duab-uploading kev ua si. Ib tug zoo nkauj nam ntawm PhotoCity yog hais tias nws muab lub uas laborious ua hauj lwm ntawm cov ntaub ntawv sau-uploading duab-mus rau hauv ib tug kev ua si zoo li kev ua si uas muaj paab, castles, thiab tus chij (Daim duab 5.11). Tus tsim ntawm PhotoCity kuj elegantly daws cov zauv thiab cov ntaub ntawv zoo sib tw ntawm eBird thiab lwm yam faib cov ntaub ntawv sau tej yaam num.

Daim duab 5.11: PhotoCity muab cov teeb laborious ua hauj lwm ntawm sau cov ntaub ntawv (ie, uploading duab) thiab muab nws mus rau hauv ib tug kev ua si (Tuite et al. 2011) .

PhotoCity twb xub deployed los pab kom ib tug 3D reconstruction ntawm ob universities: Cornell University thiab University of Washington. Players nyob rau txhua lub tsev kawm ntawv yuav tshawb xyuas tam sim no lub xeev ntawm cov reconstruction qauv ntawm lawv lub tsev kawm ntawv. Ces, lawv yuav khwv tau cov ntsiab lus los ntawm uploading dluab uas nthuav lub tam sim no qauv. Piv txwv li, yog hais tias tus tam sim no cov qauv ntawm Uris Library (ntawm Cornell) yog heev patchy, ib tug neeg uas ua ntawv yuav khwv tau cov ntsiab lus los ntawm uploading tshiab duab ntawm nws. Mob nyav, cov duab uas tau uploaded yuav tsum sib tshooj nrog uas twb muaj lawm cov duab yog li ntawd lawv yuav tsum tau validated, thiab tus naj npawb ntawm cov ntsiab lus ib tug neeg uas ua ntawv tau txais raws li nyob rau hauv cov nyiaj uas lawv yees duab ntxiv rau tam sim no qauv. Nyob rau hauv lub kawg, tus neeg tshawb fawb twb tau mus siv tau cov no uploaded duab tsim high kev daws teeb meem 3D qauv ntawm cov vaj tse rau ob lub tsev kawm ntawv (Daim Duab 5.12).

Daim duab 5,12: Lub PhotoCity kev ua si enabled soj ntsuam thiab koom los tsim high-zoo 3D qauv ntawm cov vaj tse siv cov duab uploaded by koom (Tuite et al. 2011) .

Tus tsim ntawm PhotoCity elegantly daws ob teeb meem: cov ntaub ntawv validation thiab zauv. Ua ntej, cov duab tau validated los ntawm txuam lawv tawm tsam yav dhau los cov duab uas nyob rau hauv lem matched rau yav dhau los cov duab tag nrho txoj kev rov qab mus rau lub noob cov duab uas tau uploaded by soj ntsuam. Nyob rau hauv lwm yam lus, vim hais tias ntawm no ua-nyob rau hauv redundancy, nws yog nyuaj heev rau lub system mus txais phem cov ntaub ntawv. Thib ob, cov tw system lawm cob koom mus sau cov zoo tshaj plaws-tsis yog tus yooj yim tshaj plaws-cov ntaub ntawv. Nyob rau hauv qhov tseeb, ntawm no yog ib co ntawm cov tswv yim uas players piav siv nyob rau hauv kev txiav txim mus khwv tau ntau lub ntsiab lus, uas yog sib npaug rau sau nqi ntau cov ntaub ntawv (Tuite et al. 2011) :

• "[Kuv sim] kwv lub sij hawm ntawm ib hnub thiab lub teeb pom kev zoo uas ib co duab raug coj; qhov no yuav pab tiv thaiv kom txhob rejection los ntawm qhov kev ua si. Cov uas hais tias, pos huab hnub yog cov zoo tshaj plaws nyob deb thaum soj ntsuam nrog cov ces kaum vim hais tias tsawg zoo pab qhov kev ua si daim duab tawm lub geometry los ntawm kuv cov duab. "

• "Thaum nws yog tshav ntuj, kuv siv kuv lub koob yees duab lub anti-co nta cia rau kuv tus kheej coj cov duab thaum taug kev nyob ib ncig ntawm ib tug zoo ua noj. Qhov no pub kuv mus muab crisp duab thaum tsis muaj nres kuv stride. Tsis tas li ntawd lawm: tsawg tus neeg stared ntawm kuv! "

• "Noj ntau cov duab ntawm ib tug lub tsev uas muaj 5 megapixel lub koob yees duab, ces los tsev xa, tej thaum mus txog rau 5 gigs rau ib tug weekend tua, yog thawj yees duab capture zoo. Workers cov duab nyob rau lwm hard drive folders los ntawm tsev kawm ntawv cheeb tsam, lub tsev, ces lub ntsej muag ntawm lub tsev muab zoo hierarchy structure uploads. "

Cov nqe lus los ntawm cov neeg tuaj koom qhia tias thaum lawv muab tsim nyog tawm tswv yim, lawv muaj peev xwm ua heev kws nyob sau cov ntaub ntawv ntawm kev txaus siab rau kev soj ntsuam.

Zuag qhia tag nrho, lub PhotoCity project qhia tau hais tias piv txwv thiab cov ntaub ntawv zoo yog tsis insurmountable teeb meem rau cov ceevxwm cov ntaub ntawv sau. Ntxiv mus, nws qhia tau hais tias faib cov ntaub ntawv sau tej yaam num tsis yog tas rau kev pab raws qib tias cov neeg no twb ua rau nkawv noj, xws li saib noog. Nrog rau txoj kev tsim, ua haujlwm pab dawb yuav tsum yaum kom ua lwm yam thiab.