Wannan matsala ce a cikin iyakokin na'urorin gani, wanda ke da ma'anar ma'anarsa a cikin na'urar gani.Hoton da aka samar ta hanyar ɗaukar hoto tare da kyamara zai zama gurbatacce.Misali, dukkanmu muna da kwarewar daukar hotuna da kyamarori na yau da kullun a gida.Akwai wani nau'in ruwan tabarau da ake kira "Lens mai fadi-fadi", wanda ake kira "lens na kifi" mafi rashin tausayi.Lokacin da kuka ɗauki hoto da irin wannan ruwan tabarau, za ku ga cewa hoton da ke gefen hoton yana lanƙwasa.Wannan lamarin yana faruwa ne ta hanyar "hargitsin ruwan tabarau".Misalin "Lens na kifi" shine saboda " ruwan tabarau na kifi" ruwan tabarau ne mai cike da murdiya.
Ruwan tabarau yana da murdiya, bambancin shine cewa murdiya ta bambanta sosai.Don tsarin dubawa na gani, tabbas ana fatan cewa karkatar da ruwan tabarau da aka yi amfani da shi kadan ne kamar yadda zai yiwu.Wannan saboda lokacin da tsarin hangen nesa yayi ganowa, ana yin shi akan hoton da kyamarar ta zana.Idan hoton kamara ya kasance "karkace", sakamakon gano tsarin ba zai zama "daidai ba" - wannan yana nufin cewa katako na sama ba daidai ba ne kuma ƙananan katako yana karkace.
Akwai hanyoyi guda biyu don tsarin hangen nesa don gyara karkatar da ruwan tabarau: wato farawa daga hardware ko farawa daga software.Hanyar farawa daga kayan aiki yana da sauƙi: kawai amfani da ruwan tabarau tare da ɗan murdiya.Irin wannan ruwan tabarau ana kiransa ruwan tabarau na telecentric, wanda ke da tsada, fiye da 6 ko 7 farashin ruwan tabarau na yau da kullun.Karɓar irin wannan ruwan tabarau yana ƙasa da 1%, kuma wasu na iya kaiwa 0.1%.Yawancin tsarin ma'aunin hangen nesa suna amfani da irin wannan nau'in ruwan tabarau: Hanya ta biyu ita ce farawa daga software.Lokacin yin “calibration calibration”, yi amfani da matrix dige akan madaidaitan tsarin daidaitawa don ƙididdigewa.Hanyar da ta dace ita ce: bayan kammala "calibration na kyamara", ana samun girman kowane ma'auni a cikin matrix dige bisa ga ma'aunin da aka sani, kuma girman dige akan gefen matrix dige shine nazari.Girman batu ya bambanta.Ana iya samun rabo ta hanyar kwatanta, kuma wannan rabo shine murdiya na ruwan tabarau.Tare da wannan rabo, za a iya gyara murdiya yayin aunawa na ainihi.
Lokacin aikawa: Oktoba-08-2021