Reduction of artifacts in a scanning device

Details Reduction of artifacts in a scanning device Reduction of artifacts in a scanning device

2007-11-27

2007-11-27

Lee, Cheukfan (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S486000, C358S488000, C358S474000, C358S498000, C358S412000, C358S413000

Reexamination Certificate

active

09395262

ABSTRACT:
Stopping and starting the movement of media in a scanner before completion of scanning can generate artifacts in the display of the scanned image. These artifacts arise from measurements made during the deceleration of the media before stopping and the acceleration of the media after starting. By scanning the regions that pass the optical sensor during deceleration and acceleration of the media while the media is moving relative to the optical sensor at a substantially constant speed, the degree to which artifacts are produced is reduced. The scanning of the sections of the media corresponding to the deceleration and acceleration distances of the media can be done by moving the optical sensor while the media is stationary, or, by moving the media while the optical sensor is stationary.

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