Void Pantograph When check is photocopied it reads VOID. May not work using all types of scanners or copiers. MAS90-Multipurpose, Solomon Software, Yardi, Great Plains, Timerline-Accounts Payable, SMS (14 inch legal size check), FPS (14 inch legal size check) Features; Micro Printing: Micro Printing in check border can be read with magnifier. May 12, 2017 I'm moving this thread to the Photoshop forum. The Lounge is more for non-technical questions or discussions, but it looks like you may need some more specific Photoshop help. Our patented VP is one of the most effective void pantographs available for the traditional web or sheet fed offset and flexography print industry. Arcis’ Digital Void Pantograph (DVP) is the first patented technology that is tailored to the high speed, on-demand toner or ink based digital print equipment.
In security printing, void pantograph refers to a method of making copy-evident and tamper-resistant patterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied. Typically they spell out 'void', 'copy', 'invalid' or some other indicator message.[1]
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Void Pantograph Software Free
Void pantographs work by exploiting the limitations and features of copying equipment. A scanner or photocopier will act as a low-pass filter on the original image, blurring edges slightly. It will also not be perfectly aligned with the directions of the document, causing aliasing. New malayalam movies torrent download. Features smaller than the resolution will also not be reproduced. In addition, human vision is sensitive to luminancecontrast ratio. This means that if a grey region consists of a grid of very small dark dots the filtering will produce a lighter grey, while a region of larger dots will be affected differently ('big-dot-little-dot'). This makes it possible to see a pattern that had been invisible.[1][2] Numerous variations exist, including printing the marks using a raster of lines in one direction on a background of lines in another direction,[3] or using fine line patterns that alias into a visible moire pattern when copied.[4]
References[edit]
Void Pantograph software download, free
- ^ abJason S. Aronoff, Steven J. Simske, Margaret Sturgill. Automated Optimization of Void Pantograph Settings. HP LaboratoriesHPL-2011-179 http://www.hpl.hp.com/techreports/2011/HPL-2011-179.pdf
- ^J. Kim, K. Kim, J. Lee and J Choi, 'Development of Visible Anticopy Patterns,' in TrustBus 2004, LNCS 3184, pp. 209-218 (2004)
- ^John R. Volpe. Printing method and copy-evident secure document. US patent 5487567 http://www.google.com/patents/US5487567
- ^George K. Phillips. New Digital Anti-Copy/Scan and Verification Technologies. In: Optical Security and Counterfeit Deterrence Techniques V, San Jose, California; June 3, 2004; p. 133-141; ISBN0-8194-5213-0