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- Title
Characterization of Prints Based on Microscale Image Analysis of Dot Patterns.
- Authors
Das, Indrama; Bandyopadhyay, Swati; Trémeau, Alain
- Abstract
Featured Application: This project was developed in the frame of the project PACKMARK, in collaboration with Sergusa Solutions Pvt. Ltd. which provided all printed samples necessary for this study. The aim of this project is to identify fake pharmaceuticals packaging products printed using a CMYK (Cyan Magenta Yellow Black) gravure printing machine from color information and microscale analysis. Most often fake packaging printed on blister foils using rotogravure process results from the use of counterfeited cylinder and rotogravure press. Identifying a print document (original) from a reprint document (copy or fake) can be a challenge. The analyse at microscopic scale of print documents shows random dot shapes which depend on the printing parameters as well as the printing device used. We can, therefore, draw the assumption that the dot shapes can be used as a fingerprint to differentiate a print from a reprint. In this paper, we explore several shape indexes that were not investigated until now to analyse at microscopic scale documents printed on aluminium foils using rotogravure printing process. This paper presents a statistical analysis which is based on a pattern recognition process defined by three steps. First, a new image processing pipeline is used to segment automatically disconnected dots. Next, new dot pattern features are used to characterize automatically dot patterns. Six types of dot patterns (including four types of doughnut patterns) are introduced. Lastly, a new statistical analysis method is used to characterize a printed sample from the set of dots printed on it. The experiments done demonstrate the relevance of the analytical method proposed. Results shows the potential of this method to identify a reprint from a print.
- Subjects
IMAGE analysis; INTAGLIO printing; PATTERN recognition systems; IMAGE processing; PACKAGE printing; DOCUMENT imaging systems; ALUMINUM foil; PRINTING presses
- Publication
Applied Sciences (2076-3417), 2021, Vol 11, Issue 14, p6634
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app11146634