Optimal patch code design via device characterization
AssigneeXerox Corporation
InventorsWencheng Wu, Edul N. Dalal
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Abstract
A method for optimally using color patch codes or color barcodes for transmitting machine-readable information, via device characterization, is disclosed to comprise characterizing a printing device and optionally a sensing device for identifying a number of recognizably spaced printer output colors; deriving a code book, by relating the printer output colors and their corresponding input values to information elements; and using the code book for encoding and decoding the information to be transmitted. The recognizably spaced printer output colors are in terms of a color space relevant to a color patch code or color barcode sensing device, and are related to the corresponding marking device input values.
Claims24
A method for using color indicia in transmitting machine-readable:
- information, comprising:
- characterizing a printing device and optionally a sensing device for identifying a number of recognizably spaced printer output colors;
- using these recognizably spaced printer output colors to derive a code book, which describes how the information is to be encoded and decoded;
- and, using the code book for encoding and decoding the information to be transmitted.
A system for using color indicia in transmitting machine-readable information, comprising:
- characterizing a printing device and optionally a sensing device;
- identifying a number of recognizably spaced printer output colors;
- using these recognizably spaced printer output colors to derive a code book, which describes how the information is to be encoded and decoded;
- and,
- using the code book for encoding and decoding the information to be transmitted.
A system for using color indicia in transmitting machine-readable information, comprising:
- selecting a set of printer output colors adequately recognizable by a sensing device;
- identifying a corresponding set of input signals to the printing device for the selected set of printer output colors based on a characterizing model for the printing device and optionally a characterizing model for the sensing device;
- using these adequately recognizable printer output colors to derive a code book, which describes how the information is to be encoded and decoded;
- and,
- using the code book for encoding and decoding the information to be transmitted.
Dependencies are inferred from the claim text.