Kodi kupotoza kwa magalasi ndi chiyani?

Ili ndi vuto mkati mwa mawonekedwe a optics, omwe ali ndi matanthauzidwe ake ake muzowonera.Chithunzi chopangidwa pojambula chithunzi ndi kamera chidzasokonezedwa.Mwachitsanzo, tonsefe timakhala ndi chidziwitso chojambula ndi makamera wamba kunyumba.Pali mtundu wina wa lens wotchedwa "wide-angle lens", womwe umatchedwa "fisheye lens" mopanda chifundo.Mukajambula chithunzi ndi mandala amtunduwu, mupeza kuti chithunzi chomwe chili m'mbali mwa chithunzicho ndi chopindika.Chodabwitsa ichi chimayamba chifukwa cha "kusokoneza ma lens".Chitsanzo cha "lens ya fisheye" ndi chifukwa "lens ya fisheye" ndi lens yokhala ndi kupotoza kwakukulu.

Lens ili ndi kupotoza, kusiyana kwake ndikuti kusokoneza kumasiyana kwambiri.Kwa dongosolo loyang'anira zowonera, tikuyembekeza kuti kupotoza kwa lens komwe kumagwiritsidwa ntchito ndikocheperako.Izi zili choncho chifukwa masomphenyawo akazindikira, amapangidwa pa chithunzi chojambulidwa ndi kamera.Ngati chithunzi cha kamera ndi "chokhotakhota", zotsatira za kufufuza kwadongosolo sizidzakhala "zolondola" - izi zikutanthauza kuti mtengo wapamwamba siwolondola ndipo mtengo wapansi ndi wokhota.

Pali njira ziwiri zomwe dongosolo la masomphenya liziwongolera kupotoza kwa lens: ndiko kuti, kuyambira pa hardware kapena kuyambira pa pulogalamuyo.Njira yoyambira kuchokera ku hardware ndi yophweka: ingogwiritsani ntchito lens ndi kusokoneza pang'ono.Magalasi amtunduwu amatchedwa mandala a telecentric imaging, omwe ndi okwera mtengo, kuwirikiza 6 kapena 7 mtengo wa mandala wamba.Kupotoka kwa mandala amtunduwu kuli pansi pa 1%, ndipo ena amatha kufika 0.1%.Makina ambiri oyezera masomphenya olondola kwambiri amagwiritsa ntchito mandala amtunduwu: Njira yachiwiri ndikuyambira pa pulogalamu.Mukamayesa "kuyesa kwa kamera", gwiritsani ntchito kadontho kadontho kagawo ka calibration kuti muwerengere.Njira yeniyeni ndi iyi: mukamaliza "kuyesa kwa kamera", kukula kwa mfundo iliyonse padontho la matrix kumapezedwa molingana ndi muyeso wodziwika, ndipo kukula kwa madontho pamphepete mwa matrix a dontho ndi kusanthula.Kukula kwa mfundo ndi kosiyana.Chiŵerengero chikhoza kupezedwa poyerekezera, ndipo chiŵerengero ichi ndi kupotoza kwa mandala.Ndi chiŵerengero ichi, kupotoza kungawongoleredwe pakuyezera kwenikweni.