Solid State Imaging Techniques. Logarithmic-Converting CCD Line Sensor

Autor:	Kenji Takada, Naoki Nishida, Yasushi Kusaka, Shigehiro Miyatake, Satoshi Nakamura, Kouichi Sameshima, Tsuyoshi Iwamoto, Kouichi Ishida, Keiichi Nomura
Rok vydání:	1995
Předmět:	Physics Pixel Subthreshold conduction business.industry Image quality Digital data ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Engineering Signal Ray Optics Orders of magnitude (time) business Electronic circuit
Zdroj:	The Journal of the Institute of Television Engineers of Japan. 49:169-175
ISSN:	1884-9652 0386-6831
DOI:	10.3169/itej1978.49.169
Popis:	A logarithmic-converting CCD line sensor incorporating logarithmic-converting circuits which utilizes MOSFET's subthreshold operation was developed. The sensor has 2240×3 pixels that are 12μm×12μm. It outputs a signal logarithmically proportional to the integrated amount of the incident light over more than five orders of magnitude in intensity, and therefore it can take bright and dark objects at the same time. Furthermore, its output signal is proportional to the densities on the prints or the films. Therefore, the digital data converted from its output signal retains image quality, and the shading can be corrected by just adding or subtracting. We expect that this technology will be very useful for digital copiers, camera type scanners, and film scanners.
Databáze:	OpenAIRE
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