Invention Grant
US5767980A Video based color sensing device for a printing press control system
失效
用于印刷机控制系统的基于视频的彩色感测装置
- Patent Title: Video based color sensing device for a printing press control system
- Patent Title (中): 用于印刷机控制系统的基于视频的彩色感测装置
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Application No.: US493184Application Date: 1995-06-20
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Publication No.: US5767980APublication Date: 1998-06-16
- Inventor: Xin xin Wang , Robert Nemeth
- Applicant: Xin xin Wang , Robert Nemeth
- Applicant Address: IL Westmont
- Assignee: Goss Graphic Systems, Inc.
- Current Assignee: Goss Graphic Systems, Inc.
- Current Assignee Address: IL Westmont
- Main IPC: B41F31/02
- IPC: B41F31/02 ; B41F33/00 ; B41F33/14 ; G01J3/46 ; G03F3/08 ; H04N1/40 ; H04N1/46
Abstract:
A color sensing device of a printing press control system, having a plurality of lamp fixtures (100 and 102) for providing light in the visible region and the near infrared region of the spectrum to illuminate a viewing area (104), a camera assembly (108), the camera assembly having multiple channels to capture images in the visible region and the near infrared region, and at least one lens for generating the images, a calibration target (108) with a uniform light reflectance, a device for adjusting the distribution of the light so that image captured from said calibration target in each channel of the camera assembly is as even as possible, a device for applying a position related compensation process in order to obtain an image which corresponds to a position-invariant viewing condition, and a device for applying a camera value related compensation process in order to obtain an image under a standard viewing condition.
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