Yadda tsayin mai da hankali ke shafar sakamakon ƙirar 3D

1, Gabatarwa

Don daukar hoto ba bisa ka'ida ba, akwai fage guda huɗu waɗanda ke da wahalar gina ƙirar 3D:

Fuskar da ke nunawa wanda ba zai iya yin la'akari da ainihin bayanan rubutu na abu ba. Misali, saman ruwa, gilashin, babban yanki guda ɗaya gine-ginen gine-gine.

Abubuwa masu motsi a hankali. Misali, motoci a mahadar

Wuraren da ba za a iya daidaita ma'aunin fasalin ba ko kuma abubuwan da suka dace da su suna da manyan kurakurai, kamar bishiyoyi da bushes.

Haɗaɗɗen gine-gine. Kamar titin tsaro, tashoshi, hasumiya, wayoyi, da sauransu.

Don nau'in 1 da 2 scenes, ko ta yaya za a inganta ingancin bayanan asali, samfurin 3D ba zai inganta ba.

Don nau'in nau'in 3 da nau'in nau'in 4, a cikin ainihin ayyukan, za ku iya inganta ingancin samfurin 3D ta hanyar inganta ƙuduri, amma har yanzu yana da sauƙi don samun ɓarna da ramuka a cikin samfurin , kuma ingancin aikinsa zai zama ƙasa da ƙasa.

Bugu da ƙari, abubuwan da ke sama na musamman na sama, a cikin tsarin ƙirar 3D, abin da muka fi mayar da hankali shi ne ingancin ƙirar 3D na gine-gine. Saboda matsalolin da suka danganci saitin saiti na jirgin, yanayin haske, kayan sayan bayanai, software na ƙirar 3D, da dai sauransu, yana da sauƙi don sa ginin ya nuna: fatalwa, zane, narkewa, raguwa, lalacewa, mannewa, da dai sauransu. .

Tabbas, matsalolin da aka ambata a sama kuma ana iya inganta su ta hanyar ƙirar 3D-gyara. Koyaya, idan kuna son aiwatar da babban aikin gyare-gyaren ƙirar ƙira, ƙimar kuɗi da lokaci za su yi yawa sosai.

3D model kafin gyara

3D model bayan gyara

A matsayin mai kera R&D na kyamarori da ba a taɓa gani ba, Rainpoo yana tunani ta fuskar tarin bayanai:

Yadda za a tsara kyamarar da ba ta dace ba don samun nasarar inganta ingancin samfurin 3D ba tare da haɓaka hanyar jirgin ko adadin hotuna ba?

2. Menene tsayin daka

Tsawon hankali na ruwan tabarau yana da mahimmancin mahimmanci.Yana ƙayyade girman girman batun akan matsakaicin hoto, wanda yayi daidai da ma'auni na abu da hoton. Lokacin amfani da kyamarar dijita (DSC), firikwensin firikwensin shine CCD da CMOS . Lokacin da aka yi amfani da DSC a cikin binciken sararin sama, tsayin mai da hankali yana ƙayyade nisa samfurin ƙasa (GSD).

Lokacin harbi abu ɗaya da aka yi nisa, yi amfani da ruwan tabarau mai tsayi mai tsayi, hoton wannan abu babba ne, kuma ruwan tabarau mai ɗan gajeren nesa kaɗan ne.

Tsawon hankali yana ƙayyade girman abu a cikin hoto, kusurwar kallo, zurfin filin da yanayin hoton. Dangane da aikace-aikacen, tsayin mai da hankali zai iya zama daban-daban, kama daga ƴan mm zuwa ƴan mita. Gabaɗaya, don daukar hoto na iska, mun zaɓi, mun zaɓi tsayin mai da hankali a cikin kewayon 20mm ~ 100mm.

3. Menene FOV

A cikin ruwan tabarau na gani, kusurwar da aka kafa ta tsakiyar wurin ruwan tabarau a matsayin koli da matsakaicin iyakar hoton abu wanda zai iya wucewa ta cikin ruwan tabarau ana kiransa kusurwar kallo. Girman FOV, ƙaramar haɓakar gani. A cikin sharuddan, idan abin da aka yi niyya baya cikin FOV hasken da abin ke haskakawa ko fitarwa ba zai shiga cikin ruwan tabarau ba kuma hoton ba zai kasance ba.

4.Focal tsawon&FOV

Don tsayin tsayin daka na kamara, akwai rashin fahimtar juna guda biyu:

1) Tsawon tsayin tsayin daka, mafi girman tsayin jirgin na jiragen sama, kuma mafi girman yankin da hoton zai iya rufewa;

2) Tsawon tsayin tsayin daka, mafi girman yankin ɗaukar hoto kuma mafi girman ingancin aiki;

Dalilin rashin fahimtar juna biyu na sama shine cewa ba a gane haɗin tsakanin tsayin daka da FOV ba. Haɗin da ke tsakanin su biyu shine: tsayin tsayin daka, ƙarami na FOV; guntuwar tsayin dakaru, mafi girman FOV.

Sabili da haka, lokacin da girman jiki na firam, ƙudurin firam, da ƙudurin bayanai suka kasance iri ɗaya, canjin tsayin daka zai canza tsayin jirgin kawai, kuma yankin da hoton ya rufe ba zai canza ba.

5. Tsawon Hankali & Ingantaccen Aiki

Bayan fahimtar haɗin kai tsakanin tsayin daka da FOV, za ku iya tunanin cewa tsayin tsayin daka ba shi da wani tasiri a kan ingancin jirgin. Domin Ortho-photogrammetry, yana da daidai daidai (madaidaicin magana, tsayin tsayin daka, mafi girma). tsayin jirgin, yawan kuzarin da yake amfani da shi, guntuwar lokacin jirgin kuma rage yawan ingancin aiki).

Don daukar hoto ba bisa ka'ida ba, tsayin tsayin daka, raguwar ingancin aiki.

Ruwan tabarau na kamara ana sanya shi gabaɗaya a kusurwar 45 °, don tabbatar da cewa an tattara bayanan hoton gefen facade na yankin da aka yi niyya, ana buƙatar faɗaɗa hanyar jirgin.

Domin ruwan tabarau ya rufe a 45°, za a samar da triangle dama isosceles. Ganin cewa ba a la'akari da halayen jirgin da ba a yi la'akari da shi ba, babban madaidaicin madaidaicin ruwan tabarau ana ɗaukar shi ne kawai zuwa gefen ma'aunin yankin a matsayin abin da ake buƙata na tsara hanya, to, hanyar da jirgin ta ke faɗaɗa nisa daidai da tsayin jirgin. .

Don haka idan yankin ɗaukar hoto bai canza ba, ainihin wurin aiki na ɗan gajeren ruwan tabarau mai tsayi ya fi girma fiye da na dogon ruwan tabarau.