Invention Grant
US4837450A Apparatus for reading a film image with controllable illumination and
threshold value
失效
用于读取具有可控照明和阈值的胶片图像的装置
- Patent Title: Apparatus for reading a film image with controllable illumination and threshold value
- Patent Title (中): 用于读取具有可控照明和阈值的胶片图像的装置
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Application No.: US259414Application Date: 1988-10-18
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Publication No.: US4837450APublication Date: 1989-06-06
- Inventor: Seiichiro Satomura , Masahide Kotera
- Applicant: Seiichiro Satomura , Masahide Kotera
- Applicant Address: JPX Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JPX Tokyo
- Priority: JPX60-144219 19850701; JPX60-144221 19850701; JPX60-144223 19850701; JPX60-144224 19850701; JPX60-144225 19850701
- Main IPC: G01N21/59
- IPC: G01N21/59 ; H04N1/403
Abstract:
An apparatus for reading a microfilmed image to obtain digital image signal, in which the level of quantizing is determined by measuring the density of image and of background.
Public/Granted literature
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