öҾԹôҹҹ 70 жҾԹôըӹǹҡѡͧҡͧ੾ դҡ㹡öҾ ҧáͧԨԷ㹻Ѩغѹ CCD öѹ֡Թôʼn (near infrared) դ件֧ҳ 1000 öʼnͧԨԷźѹ֡ҾԹô ͡ҡʼnͧԨԷ㹻Ѩغѹ´ФѴ٧ҡ ͧ öҾ§Ҿҡ öҾԹô¡ͧԨԷŨ֧觹ʹҧ ѺѡöҾҧ

͹жҾԹô¡ʼnͧԨԷ ҹеͧ͹ҡͧͧҹ դöкѹ֡ҾԹô СͧԨԷźҧ蹨տѺѧԹô (hot mirror) ҹ仺ѹ֡ŧ CCD ÷ͺҡѡ¡Դͧ ҡ顴㴻˹觺͹âͧͧѺ÷ȹ ѹࢉŹͧͧ ͧ LCD ͧͧǶʧ͡Ҩҡ ͹ ʴ ʼnͧöҾԹô䴉

Ҿ 1 ʧҡ͹÷ͧ㹨 LCD ͧͧ

͵ǨͺҡͧͧҹöҾԹô ѹѺ令͡ػóѺöҾ 䴉ԹôТҵ駡ͧ ҹöҾԹô

Թô ¡ѹ Թô(infrared pass) Ϳ Թôҹʧҹ ѧҨ֧繿մʹԷ еҤʧ件֧ҳ 780 ҹ ੾Թôҹը˹Ẻ ѹ IR72 觨ѧԹô 720 â仼ҹ (ԴԷҾ 50%) ǹͧеԹͧ Kodak 89b Ҩ ͡ҡѧ 87 87c Ѻ ẺШѵ͹ Kodar wratten filter 89b Hoya R72 觨 դҿ蹷еԹ

öҾ

öҾԹô͡ѹҡ ᴴ͹ҧç ͧҡö ҾԹô໓件Ҿ俿ҷդǤҧ 700-1000 ҡҾѹ迄 ⷹ͹˹ѡբͧҾҡẹ Ǥդºҧ (contrast) ͧҡͧ͡ CCD ͧͧդ͹件ҾԹô ͧҴͧ ͷͺǢͧ CCD ͹ ¡þԨóҨҡ histogram ö¡ͧҾ͹ ǹҾԴ photoshop Image > Histogram ҾբŤͺǹǶ֧ӢͧҾʴ ISO Ƕ١ͧ ҵ١ͧ histogram դҡǹشʹش

Ҿ2 ʴ higtogram ͧҾ´ ISO 50 100 200 400 ӴѺҡ仢

ҡҾ 2 繡٭´ǹҧͧ ISO 200 400 ѧ鹤Ƿ㹡öҾ 100 50 histogram ʴҾö´ǹҧ件֧ǹ м͡ ISO 50 繪ǧ noise ·شͧͧ ҧáշҹҨԸմ٨ҡ LCD ͧͧ еǨͺ䴉LjҾ趈ʼnǹ 䴉Ѻʧҡ͹ Ըչ´չѡ СôҾҡҨ§çѡ鹡ѺҾʧ㹡ͧҾҧҡ

觡ͧԨԷͧ͡ԹôСͶ ᵡҧͧͧͧдǡ㹡öҾ ͧҾԹôչͷҹԴԹô价Ź ͧҾ lcd ҧѴਹ ⿡ʴ¡ͧջѭк⿡ʨзӧҹ ҡ LCD ״к⿡ö⿡ ҹͧ⿡ʴк manual 駹÷ͺ⿡ʢͧͧµԴǷͧҾ ⿡ʵҧ ѹ ҡ鹤ҾԨóҾѴਹԴҡöҾ⿡

¹ҾҾǴ

Ҿ§ ֧ǷеͧҾ ͧҡҾҾ RGB Ҿ֧ջҧѺԴͧ кբǷҵ

original

 

Ҿǡͧ¹繢Ǵ ¹ҾǴӴ Photoshop öԸ

Image > Mode > Grayscale

ҾҹҧҾҡͧ Canon Powershot G2 µԴ IR82 ҾҾҡ gray scale ҡ¹⵪ͻ ҾҾѧҡ AutoLevel Photoshop

Image > Adjust > Desaturate

Ը Split Channel ͡˹ҾǴ 觷з شѡҾդѴҡش ҧáպҧҾᴧչԹҨ˹ѡմա 駹鹡ѺѡɳҾ Ӥѭ ͧͧҷҹͺ˹ѡҾҧ

red

green

blue

how to split

 

ѺǼͧͺ¹ҡ RGB Lab ͹ ҡ鹨֧ Split Channel ǵѴ Channel a b Channel Lightness ˹ѡ շͺ noise ҡѡ

ҾҧҧʴҾҡöҾ͹¹ҾǴҾҡ Channel Lightness

ҾҾҡ Channel Lightness ҾҷѺûѺ˹ѡ մ¤ AutoLevel Photoshop

Ҿҧ

ҾҹҧҾ¨ҡǹҸóз Tsurugamine ͧ Yohomama 㹻ȭ

 

 

 

 

ͧҡբ¹͡öӿŴշҹҧҾ ǹմ ᷹Թô ·ͺԷҾͧùҧŴͧ Fuji ҾͧҾҧҧ繡ººҾ´¡ͧǡѹ ҧ IR76 (Ҿ) ҧŴ (Ҿ) ҾԹôҡҧŴդسҾࡳ· ҡüԵ˹ѡ͡ºҧ (low contrast) Ҿҡ IR µç ͪ»Ѻ photoshop 繿ǤǷ͹Ҷ ҨҾһзѺ ѧ IR

ҡҷ繢鹵͹ öҾԹôҡͧԨԷ ҡҹʹ㨨֡֡駡ҹ ҹ´ҹž鹰ҹͧöҾԹô ෤ԴöҾ§ 駡͡ҡ web site ѧ仹 http://www.cliffshade.com/dpfwiw/ir.htm http://www.echeng.com/digital_photo/infrared/ 觨 link ѧա դǷҹʹءѺöҾ

NOTE ͧǧҷԵҹԹôѹҴҿд§ ШзҹҺʹẺ

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