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1. (WO2007072548) IMAGE DISCRIMINATION DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/072548 International Application No.: PCT/JP2005/023338
Publication Date: 28.06.2007 International Filing Date: 20.12.2005
IPC:
G06T 7/00 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7
Image analysis, e.g. from bit-mapped to non bit-mapped
Applicants:
富士通株式会社 FUJITSU LIMITED [JP/JP]; 〒2118588 神奈川県川崎市中原区上小田中4丁目1番1号 Kanagawa 1-1, Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-shi, Kanagawa 2118588, JP (AllExceptUS)
渡辺 征啓 WATANABE, Masahiro [JP/JP]; JP (UsOnly)
Inventors:
渡辺 征啓 WATANABE, Masahiro; JP
Agent:
大菅 義之 OSUGA, Yoshiyuki; 〒1020084 東京都千代田区二番町8番地20 二番町ビル3F Tokyo 3rd Fl., Nibancho Bldg. 8-20, Nibancho Chiyoda-ku Tokyo 102-0084, JP
Priority Data:
Title (EN) IMAGE DISCRIMINATION DEVICE
(FR) DISPOSITIF DE DISCRIMINATION D’IMAGE
(JA) 画像判別装置
Abstract:
(EN) Circumscribing pixels at circumferential portions of an acquired image are obtained and half-tone levels of the circumscribing pixels are compared with predetermined threshold values. The number of the circumscribing pixels whose half-tone levels are smaller than the predetermined values is counted. When the number of the circumscribing pixels whose half-tone levels are small is relatively large in comparison with the total number of circumscribing pixels in the circumferential portions of the image, the image is judged to be a low-key one. In reverse, when the number of the circumscribing pixels whose half-tone levels are small is relatively little in comparison with the total number of circumscribing pixels in the circumferential portions of the image, the image is judged to be an under one.
(FR) Selon l’invention, des pixels d’entourage de parties de circonférence d’une image acquise sont obtenus et des niveaux de demi-teinte des pixels d’entourage sont comparés à des valeurs seuils prédéterminées. Le nombre de pixels d’entourage dont les niveaux de demi-teinte sont inférieurs aux valeurs prédéterminées est compté. Si le nombre de pixels d’entourage dont les niveaux de demi-teinte sont faibles est relativement important comparé au nombre total de pixels d’entourage des parties de circonférence de l’image, l’image est estimée comme étant low-key. A contrario, si le nombre de pixels d’entourage dont les niveaux de demi-teinte sont faibles est relativement faible comparé au nombre total de pixels d’entourage des parties de circonférence de l’image, l’image est estimée comme étant sous-exposée.
(JA)  取得された画像の周辺にある外接画素を取得し、外接画素の階調レベルを所定の閾値と比較する。階調レベルが所定の閾値より小さい外接画素の数を数え、画像の周辺にある全外接画素数に比べて、相対的に階調レベルが小さい外接画素の数が多い場合には、その画像はローキー画像であると判定する。逆に、相対的に階調レベルが小さい外接画素の数が、画像周辺にある全外接画素数に比べて少ない場合には、その画像は、アンダー画像であると判定する。
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
JP4750801