色温度に着目した背景置換の違和感軽減法
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(2) 情報処理学会第 75 回全国大会. ࡚ᑟฟྍ⬟࡛࠶ࡿ[2,4]ࠋ࡞࠾㸪Bradford ኚ⾜ิ[4]࠾ࡼࡧ D65 ග※ṇつࡉࢀࡓ Hunt-Pointer-Esteves㸦HPE㸧ኚ ⾜ิ[4]ࢆࡑࢀࡒࢀ PB㸪PH ࡋ㸪ኚ⾜ิ P ࡋ࡚⏝࠸ࡓࠋ ࡲࡓ㸪ኚ⾜ิ Q ࡣ sRGB ✵㛫ࡽ XYZ ୕್่⃭ࡢ ኚ⾜ิ[4]ࢆ⏝࠸ࡓࠋ (2) Ⰽ ᗘኚ⾜ิࡢྲྀᚓ㸸๓ฎ⌮࠾࠸࡚㸪⫼ᬒ⏬ീ ⨨⏬ീࡽග※Ⰽࡢ㗹యฟຊࢆ᥎ᐃࡋ㸪ᘧ(2)ࢆ⏝࠸ ࡚Ⰽ ᗘኚ⾜ิࢆ⏕ᡂࡋࡓࠋලయⓗࡣ㸪ᬒ୰ࡢ≀ యⰍࡢᖹᆒࡀ⅊Ⰽ㏆࠸࠸࠺௬ㄝ㸦⅊Ⰽ௬ㄝ㸧[4]ᇶ ࡙ࡁ㸪⫼ᬒ⏬ീ⨨⏬ീࡢᖹᆒⰍࢆࡑࢀࡒࢀࡢග※Ⰽ 㸦RGB ್㸧ࡋ࡚ྲྀᚓࡋࡓࠋḟ㸪RGB ್ࢆ㸪XYZ ୕ ್่⃭→xy Ⰽᗘᗙᶆ→uv Ⰽᗘᗙᶆࡢ㡰ኚࡋࡓࠋࡉࡽ 㸪┦㛵Ⰽ ᗘࡢ ᐃ᪉ἲ[5]ࡼࡾග※Ⰽࡢ uv Ⰽᗘᗙᶆ ࢆ᥎ᐃࡋࡓࠋ᭱ᚋ㸪᥎ᐃග※Ⰽࡢ uv Ⰽᗘᗙᶆࢆ xy Ⰽ ᗘᗙᶆ→XYZ ୕್่⃭㸦Y=1 ࡞ࡿࡼ࠺ṇつ㸧→㗹 యฟຊࡢ㡰ኚࡋࡓࠋ᭱ᚋ㸪ᚓࡽࢀࡓ㗹యฟຊࢆᘧ (2)௦ධࡋ㸪Ⰽ ᗘኚ⾜ิࢆྲྀᚓࡋࡓࠋ. ್ࡀṇࡢ᪉ྥࡁ࠸㸪⫼ᬒ⨨࠾ࡅࡿ㐪ឤ㍍ ῶࡀ⾜ࢃࢀ࡚࠸ࡿࡇࢆពࡍࡿࠋ 㟷⿕ࡾ㢼ᬒ㸪㉥⿕ࡾ㢼ᬒ㸪࡞ࡽࡧ࡚ࡢ㢼ᬒ࠾࠸ ࡚㸪ᡭἲ 1㸦Bradford ኚ⾜ิࢆ⏝࠸ࡓᥦᡭἲ㸧࠾ࡼࡧ 2㸦HPE ኚ⾜ิࢆ⏝࠸ࡓᥦᡭἲ㸧ࡢᑻᗘ್ࡣᡭἲ 3 㸦Ⰽ ᗘኚࢆ⾜ࢃ࡞࠸ᡭἲ㸧ࡢᑻᗘ್ࡼࡾࡶࡁ࠸್ ࢆ♧ࡋ࡚࠸ࡿࠋ≉㸪࡚ࡢ㢼ᬒࢆᑐ㇟ࡋࡓሙྜ࠾ ࠸࡚㸪ᡭἲ 1 ࡢᑻᗘ್ࡀ᭱࡞ࡗࡓࠋࡇࡢࡇࡣ㸪Ⰽ ⿕ࡾࡋࡓ㢼ᬒࢆ⨨⏬ീࡋࡓሙྜ㸪ᥦᡭἲࡣ⫼ᬒ⨨ ᫎീࡢ㐪ឤ㍍ῶࡀྍ⬟࡛࠶ࡿࡇ㸪ᡭἲ 1 ࡀ᭱ࡶ᭷ ຠ࡛࠶ࡿࡇࢆ♧၀ࡋ࡚࠸ࡿࠋ ୍᪉㸪ⓑⰍ㢼ᬒ࠾ࡅࡿᑻᗘ್╔┠ࡍࡿ㸪ᡭἲ 3 ࡀᡭἲ 1㸪2 ࡼࡾࡶࡁ࡞್ࢆ♧ࡋ࡚࠸ࡿࠋࡋࡋ࡞ࡀ ࡽ㸪ᑻᗘ್ࡢ⠊ᅖ㸦್᭱᭱ᑠ್ࡢᕪ㸧ࢆẚ㍑ࡍࡿ㸪 ⓑⰍ㢼ᬒ࠾ࡅࡿᑻᗘ್⠊ᅖࡣ㸪⾲ 1 ╔Ⰽ㒊ศ♧ࡍ ࡼ࠺㸪ࡢ⏬ീ⩌࠾ࡅࡿᑻᗘ್⠊ᅖࡼࡾ⣙ 6 ಸ௨ୖ ᑠࡉ࠸ࡇࡀࢃࡿࠋ㛫㝸ᑻᗘࡣ㸪㡰ᗎᑻᗘࡢࡼ࠺࡞ ࡁࡉࡢ㡰࡙ࡅࡀྍ⬟࡛࠶ࡿࡇຍ࠼㸪ᑻᗘ್ࡢᕪࡣ ࡇ࡛ࡶ➼ࡋ࠸௬ᐃࡉࢀࡿ[7]ࠋࡇࡢࡓࡵ㸪ⓑⰍ㢼ᬒ ࢆ⨨⏬ീࡋࡓሙྜ㸪Ⰽ ᗘኚࢆ⾜ࢃ࡞࠸⫼ᬒ⨨ ἲࡀ᭷ຠ࡛࠶ࡿゝ࠼ࡿࡶࡢࡢ㸪ࡑࡢຠᯝࡣᑠࡉ࠸⪃ ࠼ࡿࠋ ௨ୖࡢ⤖ᯝࡣ㸪⨨⏬ീⰍ⿕ࡾࡋࡓ㢼ᬒ⏬ീࢆ⏝࠸ ࡓሙྜ㸪ᥦᡭἲࡼࡿ⫼ᬒ⨨ࡢ㐪ឤ㍍ῶࡀྍ⬟࡛ ࠶ࡿࡇࢆ♧၀ࡋ࡚࠸ࡿࠋ. ᥦᡭἲࡀ⫼ᬒ⨨ᫎീ࠼ࡿຠᯝࢆ᳨ドࡍࡿࡓࡵ㸪 ⿕㦂⪅ 14 ྡ㸦id01㹼id14㸧ࢆᑐ㇟ࡋ୍࡚ᑐẚ㍑ἲ[6]ࢆ⏝ ࠸ࡓホ౯ᐇ㦂ࢆ⾜ࡗࡓࠋලయⓗࡣ㸪(1)ኚ⾜ิ P ࡋ ࡚ Bradford ኚ⾜ิ PBࢆ⏝࠸ࡓᥦᡭἲ㸪(2)ኚ⾜ิ P ࡋ࡚ HPE ኚ⾜ิ PH ࢆ⏝࠸ࡓᥦᡭἲ㸪࡞ࡽࡧ(3) Ⰽ ᗘኚࢆ⾜ࢃ࡞࠸⫼ᬒ⨨ἲࡼࡿẚ㍑ࢆ⾜ࡗࡓࠋ ࡇࡢࡁ㸪ୖグ(1)㹼(3)ࡢᡭἲࢆ⏝࠸࡚ᚓࡽࢀࡓ⫼ᬒ⨨ ᫎീࢆࡑࢀࡒࢀ่⃭ A㸪่⃭ B㸪่⃭ C ࡋࡓࠋ⿕㦂⪅ ࡣ㸪ࠕ㢼ᬒ⏬ീࡢ♧ࡍሙᡤ࠸ࡿࡼ࠺࡞ࠗ⮫ሙឤ࠘ࡢ࠶ ࡿᫎീࡢ㏦ಙࠖࡍࡿሙ㠃ࢆᐃࡋ㸪่⃭ A B㸪B C㸪 C A ࡢࡑࢀࡒࢀࡢ่⃭⤌ᑐࡋ࡚ࠕே≀㡿ᇦࡢⰍࡀ 㢼ᬒ⏬ീࡢග※Ⰽྜ࠺ࡼ࠺࡞⫼ᬒ⨨ࡀ⾜ࢃࢀ࡚࠸ࡿ ࠖࢆᇶ‽┦ᑐホ౯ࢆ⾜ࡗࡓࠋ࡞࠾㸪่⃭⤌ᑐࡋ࡚ ඃຎࡀࡘࡅ㞴࠸ሙྜࡣ㸪ࠕྠ⛬ᗘ࡛࠶ࡿࠖࡢᅇ⟅ࢆチ ᐜࡋࡓࠋ. ᑻᗘ್. 4. ᐇ㦂. ͶǤͲͲ ͵ǤͲͲ ʹǤͲͲ ͳǤͲͲ ͲǤͲͲ ǦͳǤͲͲ ǦʹǤͲͲ Ǧ͵ǤͲͲ ǦͶǤͲͲ. 5. ᐇ㦂⤖ᯝ࠾ࡼࡧ⪃ᐹ ⫼ᬒ⨨⏬ീࢆᅗ 4 ♧ࡍࠋࡲࡓ㸪ホ౯⤖ᯝࢆ Thurstone ࡢẚ㍑ุ᩿ࡢἲ๎[6]ࢆ⏝࠸࡚㛫㝸ᑻᗘኚࡋ ࡓࠋ㟷⿕ࡾ㢼ᬒ㸪㉥⿕ࡾ㢼ᬒ㸪ⓑⰍ㢼ᬒ㸪࡞ࡽࡧ ࡚ࡢ㢼ᬒࢆᑐ㇟ࡋࡓᑻᗘᅗࢆᅗ 5 ♧ࡍࠋ࡞࠾㸪ᑻᗘ ่⃭A 㸦Bradford㸧. ่⃭B 㸦HPE㸧. ่⃭C 㸦↓ኚ㸧. 㟷⿕ࡾ㢼ᬒ. ㉥⿕ࡾ㢼ᬒ. ⓑⰍ㢼ᬒ. య. ᡭἲͳ. ʹǤͻ. ͳǤͷͺ. ǦͲǤͳ. ͳǤͲ. ᡭἲʹ. ͲǤͻʹ. ͳǤʹͳ. ǦͲǤͲ. ͲǤͶͺ. ᡭἲ͵. Ǧ͵Ǥͳ. ǦʹǤͻ. ͲǤʹʹ. ǦͳǤͷͷ. ᅗ 5 㛫㝸ᑻᗘࢆ⏝࠸ࡓᡭἲࡢホ౯⤖ᯝ ⾲ 1 ᑻᗘ್ࡢ⠊ᅖ ᑻᗘ್ 㟷⿕䜚㢼ᬒ ᭱ ʹǤͻ ᭱ᑠ Ǧ͵Ǥͳ ᭱䠉᭱ᑠ Ǥͷͳ. ㉥⿕䜚㢼ᬒ ⓑⰍ㢼ᬒ ͳǤͷͺ ͲǤʹʹ ǦʹǤͻ ǦͲǤͳ ͶǤ͵ͺ ͲǤ͵ͺ. య ͳǤͲ ǦͳǤͷͷ ʹǤͳ. ཧ⪃ᩥ⊩. 㟷⿕ࡾ 㢼ᬒ 㸦1R㸧. [1] 2-A. 2-B. [2]. 2-C. [3]. ㉥⿕ࡾ 㢼ᬒ 㸦1R㸧 6-A. 6-B. [4]. 6-C. [5] ⓑⰍ 㢼ᬒ 㸦1R㸧. [6] 7-A. 7-B. 7-C. ᅗ 4 ⫼ᬒ⨨⏬ീ㸦⿕㦂⪅㸸id02㸪่⃭ A㹼C㸧. 2-42. [7]. Tomo.Yun 㸸 ࠕ ࡺ ࢇ ࣇ ࣜ ࣮ ┿ ⣲ ᮦ 㞟 ࠖ 㸪 http://www.yunphoto.net/ ⏣Ⓩ㸸ࠕⰍᙬᕤᏛ ➨ 2 ∧ࠖ㸪ᮾி㟁ᶵᏛฟ∧ ᒁ㸦2005㸧 ᳃⏣࣭ᒣ⃝࣭ᑎἑ࣭ᶓ▮㸸ࠕ᪉⏬ീࢭࣥࢧࢆ ⏝࠸ࡓࢿࢵࢺ࣮࣡ࢡᑐᛂᆺ㐲 㝸┘どࢩࢫࢸ࣒ࠖ㸪 ಙᏛㄽ(D-II)㸪Vol. J88-D-II㸪 No.5㸪pp.864-875㸦2005㸧 ᪥ᮏⰍᙬᏛ㸸ࠕ᪂⦅ Ⰽᙬ⛉Ꮫࣁࣥࢻࣈࢵࢡ࠙➨ 3 ∧ࠚࠖ㸪ᮾிᏛฟ∧㸦2011㸧 JIS Z 8725㸸ࠕග※ࡢศᕸ ᗘ࠾ࡼࡧⰍ ᗘ࣭┦㛵 Ⰽ ᗘࡢ ᐃ᪉ἲࠖ㸦1987㸧 ⏣୰Ⰻஂ㸸ࠕᚰ⌮Ꮫⓗ ᐃἲࠖ㸪ᮾிᕤฟ∧ 㸦1977㸧 㣤⏣ኵ㸸ࠕឤぬ⏕⌮ᕤᏛࠖ㸪ࢥࣟࢼ♫㸦2009㸧. Copyright 2013 Information Processing Society of Japan. All Rights Reserved..
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