Image pick-up apparatus including luminance control of irradiation devices arranged in a main scan direction

作者: Kazuyuki Shigeta

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摘要: To provide an image pick-up apparatus, a fingerprint certification and method capable of correcting light volume unevenness by variation the in plurality sources. An device unit comprises pixels which are two dimensionally arranged, images object. A source consists LEDs arranged parallel to main scan direction unit, impinges on LED driving controls luminance so that distribution center region becomes more uniform.

参考文章(9)
Dean J. Fedele, George W. McClurg, Light wedge for illuminating a platen in a print scanner ,(2004)
Yoshiaki Nakamura, Yasuo Koshizuka, Photosensor system and drive control method thereof ,(2000)
Akio Nagasaka, Takafumi Miyatake, Naoto Miura, Yuichi Kashimura, Personal authentication device ,(2007)
Seiji Hashimoto, Image input apparatus ,(2003)
Yuji Kobayashi, 直久 向坂, 祐二 小林, Naohisa Kosaka, Fingerprint information processor ,(1996)
Shigeta Kazuyuki, Image processing apparatus and method ,(2003)