Inspection and authentication of color security deterrents with multiple imaging

Aronoff, Jason S. ; Simske, Steven J.

HP Development Company

关键词: Payload density;    grayscale pre-compensation;    authentication;   

RP-ID  :  HPL-2010-8

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

The use of 2D color barcodes is quickly becoming commonplace on printed packaging and labels. The color barcode allows for a higher data density in comparison to its 1D or 2D black and white counterparts. However, with the introduction of color, a new set of imaging problems is introduced in reading the color symbol. Color requires the use of higher quality image capture devices as well as the associated bandwidth when the captured image is analyzed or sent to a central repository for authentication. In this paper we introduce a novel approach to color manipulation which enables two modalities of reading; color and grayscale. This approach adjusts the printed color set such that it is visually distinct in grayscale while still retaining a reasonable resemblance to the original colors. We examine the robustness of this approach using the color tile deterrent and printing and authenticating samples using several printers and a range of deterrent sizes. In cases where symbol size negatively impacts read accuracy we propose an alternate approach which allows for improved reading while still retaining a reasonable payload density. When properly deployed, our approach can complement any color barcode technology by allowing for dual authentication.