发明名称 SYSTEM AND METHOD FOR IDENTIFICATION USING SYMBOLS WITH VARYING COLOR DENSITIES
摘要 The present invention provides a method and system for labeling and identifying objects that utilize different reflectance densities of color or grayscale symbols to represent encoded information. The encoded symbols (105) comprise a background surface (100) with a minimum reflectance density, a first symbol (120) printed on the background (100) with another reflectance density, and a second symbol (130) printed on the background (105) with still another reflectance density. The encoded symbols (105) can be created in grayscale or multiple colors, and may be printed on or affixed to the background surface (100).
申请公布号 WO0115063(A1) 申请公布日期 2001.03.01
申请号 WO2000US22490 申请日期 2000.08.17
申请人 DIGITAL NOW, INC.;REED, WILLIAM, G. 发明人 REED, WILLIAM, G.
分类号 G06K19/06;(IPC1-7):G06K7/10 主分类号 G06K19/06
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