Kawm Yuav Ua Li Cas thiaj Kho Tau Ib Tug Sib Thoob Leffer Telephoto Lens Distortion
Pincushion distortion yog ib qho teeb meem me me lens teeb meem uas tshwm sim tau thiab tsim cov teeb meem tsis zoo hauv koj cov duab. Txawm li cas los xij, nws yooj yim los kho lossis txo qis thaum koj paub tias yuav ua li cas thiab yog vim li cas nws tshwm sim.
Pincushion Distortion yog dab tsi?
Pincushion distortion yog ib qhov kev cuam tshuam cov lens uas ua rau cov dluab ua pinched hauv qhov chaw. Xav txog nws li cov nyhuv ntawm lub pincushion li tus pin tau raug thawb rau hauv nws: cov ntaub nyob ib puag ncig tus pin txav thiab mus rau tus pin li siab yog thov.
Lwm txoj kev mus rau pom qhov pincushion distortion yog saib ib daim phiaj ntawm daim phiaj. Laub rau ntawm qhov chaw ntawm daim ntawv thiab daim ntawv ceeb toom tias cov kab ncaj nraim ntawm kab sib chaws pib nkhaus mus rau sab hauv. Yog tias koj tau yees duab lub tsev siab nrog cov kab ncaj nraim, pincushion distortion ntawm lub lens yuav muaj cov nyhuv tib yam no.
Pincushion distortion yog feem ntau txuam nrog telephoto lo ntsiab muag , thiab hauv particular, zoom telephotos. Qhov kev sib cav yuav tshwm sim feem ntau ntawm lub xov tooj kawg ntawm lub lens. Cov pincushion distortion nyhuv nce nrog tus nrug qhov kwv yog los ntawm qhov pom kev axis ntawm lub lens.
Nws yog cov nyhuv ntxim rau cov lens distortion thiab, zoo ib yam li nws cov khoom siv, pincushion distortion yog feem ntau pom hauv cov duab uas muaj kab ncaj (tshwj xeeb tshaj yog thaum cov kab nyob ze ntawm ntug ntawm daim duab).
Kho Pincushion Distortion
Pincushion distortion tuaj yeem kho tau yooj yim hauv cov duab niaj hnub xws li Adobe Photoshop, uas muaj qhov "lens distortion" hloov lim. Dawb kev yees duab editing cov kev pab cuam kuj muaj kev kho me ntsis zoo dua.
Xws li chim siab distortion, pincushion distortion yog txhawb zog los ntawm cov teebmeem ntawm cov kev xav ntawm cov dluab . Qhov no txhais tau hais tias qee qhov sib txawv ntawm qhov teeb meem no yuav raug kho nyob rau hauv lub koob yees duab.
Thaum tua, koj tuaj yeem siv ob peb kauj ruam los mus tshem tawm los yog txo tus cwj pwm yuam kev:
- Vim hais tias pincushion distortion feem ntau cuam tshuam cov khoom uas muaj kab ncaj nraim, koj tuaj yeem txo cov nyhuv ntawm pincushion distortion los ntawm cov khoom tua kab uas tsis muaj cov kab ncaj nraim. (Tsis nco ntsoov ua tau, txoj cai?)
- Sim kom tsis txhob raug tua ntawm qhov siab tshaj plaws ntawm lub zeem muag ntawm lub telephoto zoom lens. Txav mus ze rau qhov kawm thiab zoom tawm yog tias tau los yog tua cov duab me ntsis dav tshaj qhov koj nyiam thiab qoob loo hauv lub computer.
- Tsiv mus rau lwm qhov chaw thiab pom tias qhov txawv ntawm qhov khoom ua rau kom cov nyhuv pincushion. Koj tuaj yeem xav pauv txoj kev xav kom tiav thiab tsis txhob thaij duab yam khoom kom ncaj rau kom muaj qhov txawv txav ua qhov zoo tshaj plaws rau cov duab zoo nkauj. (Thaum twg koj tsis tuaj yeem kho nws, txhim khu nws!)
- Yog tias koj muaj cov kab ncaj nraim hauv koj tus kwv, sim ua kom lawv nyob ze rau ntawm qhov chaw ntawm qhov koj pom. Kab tom ntej ntawm tus ncej ntug kuj tseem tuaj yeem tshwm sim tau ntau dua vim tias cov ncej yog ib txoj kab ncaj nraim.