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Nasarar nasarar daukar hoto

——Yi amfani da ƙirar 3D don yin binciken cadastral don wurare masu tsayi

1. Bayani

Bayan shekaru da yawa na ci gaba, yanzu a kasar Sin, an yi amfani da daukar hoto a ko'ina a cikin ayyukan binciken cadastral na karkara. Duk da haka, saboda ƙuntataccen yanayin fasaha na kayan aiki , ɗaukar hoto mai banƙyama har yanzu yana da rauni don ma'auni na cadastral na wurare masu girma, musamman saboda tsayin daka da kuma tsarin hoto na ruwan tabarau na kyamarar da ba daidai ba. Bayan shekaru masu yawa na ƙwarewar aikin, mun gano cewa daidaiton taswirar ya kamata ya kasance a cikin 5 cm, to, GSD dole ne ya kasance a cikin 2 cm, kuma samfurin 3D ya zama mai kyau sosai, gefuna na ginin dole ne su kasance madaidaiciya kuma a fili.

 

Gabaɗaya, tsayin hangen nesa kamara da ake amfani da shi don ayyukan auna cadastral na karkara shine 25mm a tsaye kuma 35mm a tsaye. Don cimma daidaito na 1:500, GSD dole ne ya kasance tsakanin 2 cm. Kuma don tabbatar da cewa, tsayin daka na jiragen yana gabaɗaya tsakanin 70m-100m. Dangane da wannan tsayin jirgin sama, babu wata hanyar da za a iya kammala tattara bayanai na gine-ginen sama da mita 100. Ko da idan kun gudanar da jirgin ta wata hanya , ba zai iya tabbatar da kullun rufin ba, wanda ya haifar da rashin ingancin samfurin. .Kuma saboda tsayin yaƙin ya yi ƙasa da ƙasa, yana da matukar haɗari ga UAV.

Don magance wannan matsalar, a cikin Mayu 2019, mun gudanar da gwajin tabbatar da daidaito na Hotunan Oblique don gine-ginen birni. Manufar wannan gwajin shine don tabbatar da ko daidaiton taswirar ƙarshe na ƙirar 3D da aka gina ta RIY-DG4pros kyamarar oblique na iya biyan buƙatun 5 cm RMSE.

2. Tsarin gwaji

Kayan aiki

A cikin wannan gwajin, mun zaɓi DJI M600PRO, sanye take da Rainpoo RIY-DG4pros oblique kyamarar ruwan tabarau biyar.

Yankin bincike da tsara wuraren sarrafawa

Dangane da matsalolin da ke sama, da kuma ƙara wahalhalu, mun zaɓi musamman tantanin halitta guda biyu tare da matsakaicin tsayin gini na mita 100 don gwaji.

An saita wuraren sarrafawa bisa ga taswirar GOOGLE, kuma yanayin da ke kewaye ya kamata ya kasance a buɗe kuma ba tare da toshewa ba gwargwadon yiwuwa. Nisa tsakanin maki yana cikin kewayon 150-200M.

Ma'anar sarrafawa shine murabba'in 80 * 80, an raba shi zuwa ja da rawaya bisa ga diagonal, don tabbatar da cewa za a iya gane cibiyar a fili lokacin da tunani ya yi karfi ko kuma hasken bai isa ba, don inganta daidaito.

Tsare-tsaren Hanyar Hanyar UAV

Domin tabbatar da amincin aiki, mun tanadi tsayayyen tsayi na mita 60, kuma UAV ya tashi a mita 160. Domin tabbatar da rufaffiyar rufin, mun kuma ƙara yawan abin hawa. Matsakaicin haɗe-haɗe na tsayi shine 85% kuma ƙimar haɗe-haɗe shine 80%, kuma UAV ya tashi a gudun 9.8m/s.

Rahoton Jirgin Jirgin Sama (AT).

Yi amfani da software na “Sky-Scanner” (Rainpoo ya haɓaka) don zazzagewa da aiwatar da ainihin hotuna, sannan shigo da su cikin software na ƙirar ƙirar ContextCapture 3D ta maɓalli ɗaya.

  • 15h.

    LOKACI:15h.

     

  • 23h.

    Samfuran 3D

    lokaci: 23h.

Rahoton murdiya ruwan tabarau

Daga zane-zane na grid na murdiya, ana iya ganin cewa murdiyawar ruwan tabarau na RIY-DG4pros kadan ne, kuma kewayen kusan gaba daya yayi daidai da daidaitaccen murabba'in;

Kuskuren ƙira RMS

Godiya ga fasahar gani na Rainpoo, za mu iya sarrafa ƙimar RMS a cikin 0.55, wanda shine muhimmin ma'auni ga daidaiton ƙirar 3D.

Aiki tare na ruwan tabarau biyar

Ana iya ganin cewa nisa tsakanin babban batu na tsakiyar tsakiyar ruwan tabarau na tsaye da kuma babban batu na madaidaicin ruwan tabarau shine: 1.63cm, 4.02cm, 4.68cm, 7.99cm, ban da ainihin bambancin matsayi, ƙimar kuskure sune: - 4.37cm, -1.98cm, -1.32cm, 1.99cm, matsakaicin bambancin matsayi shine 4.37cm, ana iya sarrafa aiki tare da kyamara a cikin 5ms;

Kuskuren tsinkaya

RMS na abubuwan da aka annabta da na ainihin sarrafawa sun bambanta daga 0.12 zuwa 0.47 pixels.

3. Samfuran 3D

Nuni samfuri
Nunin dalla-dalla

Zamu iya ganin hakan saboda RIY-DG4pros yana amfani da ruwan tabarau mai tsayi mai tsayi, gidan da ke ƙasan ƙirar 3d ya fito fili don gani. Matsakaicin tazarar lokacin bayyanar kyamara na iya kaiwa 0.6s, don haka ko da an ƙara yawan abin da ya wuce kima zuwa 85%, babu wani fitowar hoto.
Hanyoyin sawun gine-gine masu tsayi suna da haske sosai kuma madaidaiciya, wanda kuma yana tabbatar da cewa za mu iya samun ingantattun sawun ƙafa akan ƙirar daga baya.

4. Tabbatar da Gaskiya

  • Muna amfani da jimlar tashar don tattara bayanan matsayi na wuraren duba sannan mu shigo da fayil ɗin DAT cikin CAD. Sannan kai tsaye kwatanta bayanan matsayin maki akan ƙirar don ganin bambance-bambancen su.
  • Muna amfani da jimlar tashar don tattara bayanan matsayi na wuraren duba sannan mu shigo da fayil ɗin DAT cikin CAD. Sannan kai tsaye kwatanta bayanan matsayin maki akan ƙirar don ganin bambance-bambancen su.

5. Kammalawa

A cikin wannan gwajin, wahalar ita ce, tsayi da ƙananan faɗuwar wurin, babban yawa na gidan da ƙasa mai rikitarwa. Wadannan abubuwan zasu haifar da karuwa a cikin wahalar jirgin , haɗari mafi girma, da kuma mafi muni na 3D , wanda zai haifar da raguwar daidaito a binciken cadastral.

Saboda RIY-DG4pros mai da hankali tsayi ya fi tsayin kyamarori na yau da kullun, yana tabbatar da cewa UAV ɗinmu na iya tashi a cikin ingantaccen tsayi, kuma ƙudurin hoton abubuwan ƙasa yana cikin 2 cm. A lokaci guda kuma, cikakken ruwan tabarau na iya taimaka mana mu sami ƙarin kusurwoyi na gidaje lokacin da yake tashi a cikin manyan gine-ginen gine-gine, don haka inganta ingancin samfurin 3D. Ƙarƙashin cewa duk na'urorin na'urorin suna da garantin, muna kuma inganta hawan jirgin sama da yawan rarraba wuraren sarrafawa don tabbatar da daidaiton samfurin 3D.

Hotunan oblique don manyan wuraren binciken cadastral, sau ɗaya saboda ƙayyadaddun kayan aiki da rashin ƙwarewa, za a iya auna su ta hanyar hanyoyin gargajiya kawai. Amma tasirin manyan gine-gine akan siginar RTK kuma yana haifar da wahala da rashin daidaiton ma'auni. Idan za mu iya amfani da UAV don tattara bayanai, za a iya kawar da tasirin siginar tauraron dan adam gaba ɗaya, kuma ana iya inganta daidaiton ma'auni sosai. Don haka nasarar wannan jarabawa tana da matukar ma'ana a gare mu.

Wannan gwajin ya tabbatar da cewa RIY-DG4pros na iya da gaske sarrafa RMS zuwa ƙaramin kewayon ƙima, yana da daidaitaccen ƙirar ƙirar 3D, kuma ana iya amfani da shi cikin ingantattun ayyukan ma'auni na manyan gine-gine.