Indaba eyimpumelelo yezithombe ze-oblique

Icala eliyimpumelelo lezithombe ze-oblique

——Sebenzisa imodeli ye-3D ukwenza inhlolovo ye-cadastral ezindaweni eziphakeme kakhulu

1. Uhlolojikelele

Ngemuva kweminyaka eminingana yentuthuko, manje eseShayina, ukuthwebula izithombe ezitshekile sekusetshenziswe kabanzi kumaphrojekthi wokuhlola we-cadastral yasemaphandleni. Kodwa-ke, ngenxa yokukhawulelwa kwezimo zobuchwepheshe zemishini, ukuthwebula kwezithombe ezitshekile kusesebuthakathaka ekulinganisweni kwe-cadastral yezigcawu zamaconsi amakhulu, ikakhulukazi ngenxa yokuthi ubude obugxilwe kanye nefomethi yesithombe yelensi yekhamera etshekile ayikho ezingeni. Ngemva kweminyaka eminingi yokuhlangenwe nakho kwephrojekthi, sithole ukuthi ukunemba kwemephu kufanele kube phakathi kuka-5 cm, bese i-GSD kufanele ibe phakathi kuka-2 cm, futhi imodeli ye-3D kufanele ibe yinhle kakhulu, imiphetho yesakhiwo kufanele iqonde futhi icace.

Ngokuvamile, ubude bekhamera obugxile esetshenziselwa amaphrojekthi wasemaphandleni wokulinganisa i-cadastral bungu-25mm ngokuma mpo kanye no-35mm oblique. Ukuze kuzuzwe ukunemba kwe-1:500, i-GSD kufanele ibe phakathi kuka-2 cm. Futhi ukuqinisekisa ukuthi, ukuphakama kokundiza kwama-drones ngokuvamile kuphakathi kuka-70m-100m. Ngokwalokhu kuphakama kwendiza, ayikho indlela yokuqedela ukuqoqwa kwedatha yezakhiwo eziphakeme ezingaphezu kuka-100m. Ngisho noma uqhuba indiza noma kunjalo, ayikwazi ukuqinisekisa ukugqagqana kophahla, okuholela kukhwalithi embi yemodeli. .Futhi ngenxa yokuthi ukuphakama kwempi kuphansi kakhulu, kuyingozi kakhulu ku-UAV.

Ukuze kuxazululwe le nkinga, ngoMeyi 2019, senze ukuhlolwa kokuqinisekiswa kokunemba kwe-Oblique Photography yezakhiwo eziphakeme zasemadolobheni. Injongo yalokhu kuhlola iwukuqinisekisa ukuthi ingabe ukunemba kokugcina kwemephu kwemodeli ye-3D eyakhiwe ikhamera etshekile ye-RIY-DG4pros ingahlangabezana yini nemfuneko ye-5 cm RMSE.

2. Inqubo yokuhlola

Izisetshenziswa

Kulesi sivivinyo, sikhetha i-DJI M600PRO, efakwe ikhamera ye-Rainpoo RIY-DG4pros oblique enamalensi amahlanu.

Indawo yokuhlola kanye nokuhlelwa kwamaphuzu okulawula

Ukuphendula lezi zinkinga ezingenhla, kanye nokwandisa ubunzima, sikhethe ngokukhethekile amaseli amabili anesilinganiso sokuphakama kwesakhiwo esingamamitha angu-100 ukuze ahlolwe.

Amaphoyinti okulawula asethwa kusengaphambili ngokuya ngemephu ye-GOOGLE, futhi indawo ezungezile kufanele ivuleke futhi ingavinjwanga ngangokunokwenzeka. Ibanga phakathi kwamaphoyinti lisebangeni lika-150-200M.

Indawo yokulawula iyisikwele esingu-80*80, ihlukaniswe ngokubomvu nokuphuzi ngokuvumelana ne-diagonal, ukuze kuqinisekiswe ukuthi isikhungo sephoyinti singabonakala ngokucacile lapho ukubonakaliswa kuqine kakhulu noma ukukhanya kunganele, ukuze kuthuthukiswe ukunemba.

Ukuhlela Umzila we-UAV

Ukuze siqinisekise ukuphepha kokusebenza, sigcine ukuphakama okuphephile okungamamitha angu-60, futhi i-UAV indize ngamamitha angu-160. Ukuze siqinisekise ukugqagqana kophahla, siphinde sanyusa izinga lokugqagqana. Izinga lokugqagqana kwe-longitudinal lingu-85% futhi izinga lokugqagqana elinqamulayo lingu-80%, futhi i-UAV indize ngesivinini esingu-9.8m/s.

Umbiko we-Aerial Triangulation(AT).

Sebenzisa isofthiwe ye-“Sky-Scanner” (Yathuthukiswa yi-Rainpoo) ukuze ulande futhi ucubungule ngaphambili izithombe zangempela, bese uzingenisa kusofthiwe yokumodela ye-ContextCapture 3D ngokhiye owodwa.

15h.

NGESIKHATHI:15h.
23h.

Ukumodela kwe-3D

isikhathi: 23h.

Umbiko wokuhlanekezelwa kwelensi

Kusuka kumdwebo wegridi yokuhlanekezela, kuyabonakala ukuthi ukuhlanekezela kwelensi ye-RIY-DG4pros kuncane kakhulu, futhi umjikelezo ucishe uqondane ngokuphelele nesikwele esijwayelekile;

Iphutha lokwenqaba i-RMS

Ngenxa yobuchwepheshe be-optical be-Rainpoo, singakwazi ukulawula inani le-RMS ngaphakathi kwe-0.55, okuyipharamitha ebalulekile ekunembeni kwemodeli ye-3D.

Ukuvumelanisa amalensi amahlanu

Kuyabonakala ukuthi ibanga eliphakathi kwephuzu eliyinhloko lelensi eqondile emaphakathi kanye nephuzu eliyinhloko lamalensi atshekile yilawa: 1.63cm, 4.02cm, 4.68cm, 7.99cm, khipha umehluko wesikhundla sangempela, amanani wephutha yilawa: - 4.37cm, -1.98cm , -1.32cm, 1.99cm, umehluko omkhulu wesikhundla ngu-4.37cm, ukuvumelanisa kwekhamera kungalawulwa ngaphakathi kwe-5ms;

Khomba iphutha

I-RMS yamaphoyinti okulawula abikezelwe kanye nangempela asukela kumaphikseli angu-0.12 kuya ku-0.47.

3. Ukumodela kwe-3D

Isibonisi Semodeli

Bonisa imininingwane

Singakubona lokho ngoba i-RIY-DG4pros isebenzisa amalensi amade obude obugxilile, indlu engezansi kwemodeli ye-3d icace kakhulu ukuyibona. Ubuncane besikhawu sesikhathi sokuchayeka sekhamera singafinyelela ku-0.6s, ngakho-ke noma izinga lokugqagqana kwe-longitudinal likhushulwa laya ku-85%, akukho ukuvuza kwesithombe okwenzekayo.
Imigqa yaphansi yezakhiwo eziphakeme kakhulu icace kakhulu futhi iqondile ngokuyisisekelo, okuqinisekisa ukuthi singathola izinyathelo ezinembe kakhudlwana kumodeli kamuva.

4. Hlola Ukunemba

Sisebenzisa isiteshi esiphelele ukuqoqa idatha yesikhundla samaphoyinti bese singenisa ifayela le-DAT ku-CAD. Bese uqhathanisa ngokuqondile idatha yendawo yamaphoyinti kumodeli ukuze ubone umehluko wawo.
Sisebenzisa isiteshi esiphelele ukuqoqa idatha yesikhundla samaphoyinti bese singenisa ifayela le-DAT ku-CAD. Bese uqhathanisa ngokuqondile idatha yendawo yamaphoyinti kumodeli ukuze ubone umehluko wawo.

5. Isiphetho

Kulesi sivivinyo, ubunzima buwukuthi ukwehla okuphezulu nokuphansi kwendawo yesehlakalo, ukuminyana okuphezulu kwendlu kanye nephansi eliyinkimbinkimbi. Lezi zici zizoholela ekwandeni kobunzima bendiza , ingozi ephakeme, kanye nemodeli ye-3D embi kakhulu, okuzoholela ekwehleni kokunemba kuhlolo lwe-cadastral.

Ngenxa yokuthi ubude befocal ye-RIY-DG4pros yinde kunamakhamera avamile atshekile, iqinisekisa ukuthi i-UAV yethu ingandiza endaweni ephephile ngokwanele, nokuthi ukucaca kwesithombe sezinto eziphansi kungaphakathi kuka-2 cm. Ngesikhathi esifanayo, i-lens yefreyimu egcwele ingasisiza ukuthi sibambe ama-engeli amaningi ezindlu lapho sindiza ezindaweni zokwakha ezinabantu abaningi, ngaleyo ndlela sithuthukise ikhwalithi yemodeli ye-3D. Ngaphansi kwesisekelo sokuthi wonke amadivayisi wehadiwe aqinisekisiwe, siphinde sithuthukise ukugqagqana kwendiza kanye nokuminyana kokusabalalisa kwamaphoyinti okulawula ukuze siqinisekise ukunemba kwemodeli ye-3D.

izithombe ze-oblique zezindawo eziphakeme zokuhlola i-cadastral, kanye ngenxa yokulinganiselwa kwemishini kanye nokuntuleka kokuhlangenwe nakho, kungalinganiswa kuphela ngezindlela zendabuko. Kodwa umthelela wezakhiwo eziphakeme kakhulu kusignali ye-RTK futhi kubangela ubunzima nokunemba okungalungile kokulinganisa. Uma singasebenzisa i-UAV ukuqoqa idatha, umthelela wamasignali wesathelayithi ungasuswa ngokuphelele, futhi ukunemba okuphelele kokulinganisa kungathuthukiswa kakhulu. Ngakho impumelelo yalolu vivinyo ibaluleke kakhulu kithi.

Lokhu kuhlola kufakazela ukuthi i-RIY-DG4pros ingakwazi ngempela ukulawula i-RMS ebangeni elincane lenani, inokunemba okuhle kwemodeli ye-3D, futhi ingasetshenziswa kumaphrojekthi wokulinganisa anembile wezakhiwo eziphakeme.

Okudlule:Kuyini ukusebenza kahle kwe-DG4Pros? Ngiwamisa kanjani amapharamitha afanele?

Olandelayo:Ukuthi i-chromatic aberration kanye nokuhlanekezela kuyithinta kanjani i-ima

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