System and method for encoding high density geometric symbol set

Abstract

A system and related technology provides a platform for encoding high-density geometric symbol sets, such as triangular barcode-type encodings that can be used to encode driver's licenses, biometric IDs, passports, or other transaction or identification media. According to an embodiment of an aspect of the present invention, an inkjet, laser or other printer or output device may emboss paper, plastic or other media with geometric symbols such as triangles in a defined array to represent names, addresses or other Identifying information, such as a digital facial photograph, iris or retinal scan, fingerprint, signature, or other information. The geometric symbols may in one aspect be arranged in a staggered format, separated in various embodiments by white space which may be used to reduce the effects of graphical distortion and other distortions. Because triangular symbols can generally be packed closer together, and the number of different individual symbols can be scaled according to the range of color spaces used for the symbol set, it can be high enough to scan biological iris or retinal, digital Information density at which facial photographs or other identification or other information are encoded satisfactorily. In various embodiments, error correction processing, such as the Reed-Solomon technique, may be used to improve scanning accuracy. In other embodiments, a reference palette may be embedded in the imprinted medium to provide a measure of color fading or other distortion.

Description

[0001] Cross References to Related Applications [0002] The subject matter of this application is related to that of U.S. Provisional Application No. 60 / 583,571, filed June 28, 2004, entitled "Ultra HighDensity Triangular Symbology Color Barcode Format" This application is assigned or is obliged to be assigned to the same company as this application, from which this application claims priority and which is hereby incorporated by reference. [0003] Statement Regarding Research or Development Sponsored by the U.S. Federal Government [0004] Not applicable. technical field [0005] This invention relates to the field of symbol encoding in identification and transaction media, and more particularly to systems and methods for encoding barcodes or other symbol sets using geometric symbol sets in color or grayscale space. Background technique [0006] Common barcodes and other encoding techniques, such as the Universal Product Code (UPC) encoded on retail products, driver's li...

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Problems solved by technology

[0009] However, for example, encoding a driver's license or ID card at 32 bits per pixel, 20 lines per inch using square or block symbols may still cause problems due to faded paper, pixelation, rotation or other misalignment, or other issues when reading the medium and its symbols. scan errors for

Thus, while there may be an increase in information density compared to a single-line two-color coding, accuracy or final density may still be compromised or less favorable when using grayscale or color coded in square or block symbol sets. limited

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