Shin jimiyyar dark Angle? Kuma kewaye yi amfani da kuma embedded vision applications？

Saurin ci gaban dandamali na sarrafa hoto ya kawo sauyi a fagen, yana ba da amintaccen kuma mai tsada-tasiri na gani a cikin kasuwannin daban-daban. Waɗannan dandamali suna haɓaka ingancin hoto ta hanyar dabaru kamar haɓaka, dawowa, ɓoyewa, da matsewa, waɗanda suka haɗa da gyara haske, canza girman hotuna (zoom na dijital), gano gefen, da kimanta algorithms na rarrabuwa. A cikin waɗannan aikace-aikacen, CMOS na'urori masu auna firikwensin hoto sun zama nau'in firikwensin hoto da aka fi amfani da shi, kama haske don samar da matattarar pixel wanda ke zama tushe don sarrafa hoto na gaba.

Koyaya, zaɓar madaidaicin ruwan tabarau don haɗawa tare da tsarin kyamarar don ɗaukar hoto da sarrafawa mai kyau tsari ne mai ƙalubale. Yana nufin sanin abin da ya dace.filin gani (FOV), zabar tsakanin gyarawa mayar da hankali ko autofocus, da kuma saitin aiki nesa. Bugu da ƙari, abubuwan da ke gani kamar ruwan tabarau da kuma matsalolin daidaitaccen fararen fata na iya tsoma baki tare da fitarwa hoto, yana shafar ingancin gani na ƙarshe.

A cikin wannan labarin, za mu zurfafa cikin manufar ruwan tabarau, bincika sanadin sa, da kuma samar da mafita mai amfani don taimakawa masu amfani da kyamarar da aka saka su kawar da wannan matsalar ingancin hoto.

Menene ruwan tabarau?

Lens vignetting yana nufin raguwa a hankali a cikin haske ko jikewa daga tsakiyar zuwa gefuna ko kusurwoyin hoto. Hakanan ana kiranta shading, haske mai faduwa, ko shading luminance, yawan cinikin vinnieting yawanci ana auna shi a cikin f-stop kuma ya dogara da girman ruwan tabarau da sigogin ƙira daban-daban.

Rashin haske yana sarrafa hasken hoto ta hanyar canza yawan adadin haske da ya kai ga na'urar daukar hoto ta hanyar ruwan tabarau.

Vignet ba kawai yana shafar ingancin hoto ba amma kuma yana iya haifar da asarar mahimman bayanai na gani a wasu aikace-aikace. Alal misali, a binciken masana'antu ko hoton likita wanda ke buƙatar daidaitattun launi da haske, vignetting na iya haifar da kuskuren hukunci ko bincike mara kyau. Saboda haka, fahimtar da kuma daukar matakan ragewa ko kawar da ruwan tabarau yana da mahimmanci don tabbatar da ingancin hoto da kuma inganta aikin tsarin gani.

Ta yaya ake yin zane-zane, kuma waɗanne irin zane-zane ne ake yi?

Me ya sa aka yi amfani da zane-zane?Ana iya danganta faruwar ruwan tabarau da dalilai daban-daban, da farko saboda ƙirar abubuwan gani da kansu. Hana haske da kayan aiki na waje na iya kara wannan lamarin, kuma wani lokacin ana gabatar da shi da gangan yayin aikin bayan aiki.

Dalilai daban-daban na ruwan tabarau sun haɗa da:

• Ƙarƙashin ƙirar ƙira:Wannan nau'in yana faruwa ne saboda iyakokin jiki na ruwan tabarau, yana hana hasken waje daga isa cikakke gefen firikwensin hoto, musamman a bayyane a cikin hadadden tsarin gani tare da abubuwa da yawa na ruwan tabarau.
• Ƙarƙashin halitta:Har ila yau, an san shi da cos4θ fall-off, yana da raguwa ta halitta a cikin haske saboda kusurwar haske dangane da jirgin hoto, bin doka ta cosine na hudu, inda haske ya ragu da sauri yayin da kusurwar da ke da hasken gani ya karu.
• Shugaban Ray Angle (CRA):CRA muhimmin ma'auni ne yayin zabar ruwan tabarau da na'urori masu auna sigina, yana shafar haske da tsabta a gefen hoton. CRA mai yawa na iya haifar da inuwa a gefen hoton, yana shafar ingancin hoto.
• Ƙarƙashin ƙarfe na ƙarfe:Yana faruwa lokacin da aka toshe hasken haske ta hanyar kayan aikin ruwan tabarau, zoben tacewa, ko wasu abubuwa, wanda ke haifar da raguwar haske na wucin gadi a gefen hoton. Wannan abu ne na yau da kullum idan da'irar hoto ta ruwan tabarau ta fi karami fiye da girman firikwensin.
• Yanzata a cikin gare:A wasu lokatai, don yin zane-zane ko kuma don nuna ainihin abin da ke cikin hoton, masu daukar hoto suna ƙara zane-zane na gani a lokacin da ake sarrafawa.

Waɗanne hanyoyi ne ake amfani da su wajen gyara ruwan tabarau?

Kamar yadda aka tattauna, ruwan tabarau na ruwan tabarau abu ne da ba a so. Ko da yake ba za a iya kauce masa gaba ɗaya ba, ana iya gyara shi yadda ya kamata don gani mai mahimmanci tare da waɗannan matakan:

• Ƙididdigar ƙididdigar ƙididdigar ƙididdiga:Tabbatar da darajar CRA na ruwan tabarau ya fi na microlens na firikwensin yana da mahimmanci don kawar da hasken hoto ko matsalolin launi. Dole ne masana'antun su bincika ƙirar ruwan tabarau don daidaita tsarin firikwensin.
• Daidaitawa na Mai sarrafa Alamar Hotuna (ISP):ISP yana taka muhimmiyar rawa wajen sarrafa hotunan da firikwensin ya kama. Hanyoyin takamaiman, kamar Imatest, na iya gwada ingancin hoto da daidaita takamaiman rajista a cikin ISP don rage inuwa ruwan tabarau.
• Ƙara yawan f-dakatar:Ta hanyar ƙara yawan f-stop na ruwan tabarau (watau, rage buɗewa), tasirin alamun halitta ko faduwar cos4θ na iya raguwa.
• Amfani da nisa mai nisa:A cikin ƙananan f / # (rabo tsakanin tsayin ido zuwa girman buɗe ido), ƙananan ruwan tabarau, ko lokacin da ake buƙatar babban ƙuduri a ƙananan farashi, ana iya kawar da ƙwaƙwalwar kyamarar inji ta amfani da tsayin ido mai tsayi.
• Gyara filin filin:Hanyar da aka saba amfani da ita don gyaran ruwan tabarau mai nauyi, ya ƙunshi haskakawa daidai da farfajiya mai faɗi da kama filin duhu da firam ɗin tunani mai haske, sannan lissafi da amfani da gyaran filin.
• Yin amfani da kayan aikin software:Ana iya amfani da kayan aikin software daban-daban, kamar kayan aikin suturar hoto na microscopy da CamTool, don gyaran inuwa.
• Yin amfani da ruwan tabarau na telecentric:Lens da aka tsara don zama telecentric a cikin sararin hoto na iya gyara juyawa saboda wannan telecentricity yana haifar da haske mai haske sosai, yana kawar da lalacewar cos4θ na al'ada a cikin hasken hoto daga ƙirar gani zuwa kusurwar filin.

Muna fatan wannan talifin ya taimaka wajen magance matsalar ruwan tabarau. Hakika, idan har yanzu kana da tambayoyi game da shawo kan ruwan tabarau vignetting a saka gani ko kuma idan kana so ka hadekayan aikin kamara masu haɗawaA cikin kayayyakin, jin free to tuntube muSinoseen, wani gogaggenShirin daidaita kamera jama'a China.