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Patent Searching and Data


Title:
PICTURE READING METHOD AND PICTURE READER
Document Type and Number:
Japanese Patent JP2005123834
Kind Code:
A
Abstract:

To secure bit resolution of a low dose region without using an AD converter of a high bit in a picture reading method and a picture reader, with which current outputted from a solid detector is detected, an analog signal corresponding to an amount of current is converted into a digital signal and a picture signal is created.

A current detecting means 20 detects current outputted from the solid detector 10 by a plurality of different gains G at every pixel. An AD conversion means 30 converts the analog signal corresponding to the amount of the currents detected by the plurality of different gains G into the digital signal. A picture signal creating means 40 selects the digital signal corresponding to the largest gain G when the digital signal which is not saturated exists from the digital signals corresponding to the respective gains G at every pixel, selects the digital signal among them when the digital signal which is not saturated does not exist and creates a picture signal based on the selected digital signal.


Inventors:
YAMAGUCHI AKIRA
Application Number:
JP2003355810A
Publication Date:
May 12, 2005
Filing Date:
October 16, 2003
Export Citation:
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Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G01T1/17; G01T1/00; G01T1/20; G01T1/202; G01T1/24; G01T1/29; G03B42/02; H01L27/14; H04N5/225; H04N5/30; H04N5/335; H04N5/369; H04N5/378; (IPC1-7): H04N5/30; G01T1/17; G01T1/24; G03B42/02; H01L27/14; H04N5/225; H04N5/335
Attorney, Agent or Firm:
Yanagita Seiji
Go Sakuma