Publications de Isaac Amidror | EPFL Graph Search

Jaggies as aliasing or reconstruction phenomena: a tutorial

Jaggies (staircasing effects) along slanted lines or curved edges are omnipresent in digital imaging. They are so widespread in digital display devices that very often they are associated with the modern "computerized" world (and sometimes even intentional ...

Is&T & Spie2014

Mathematical moiré models and their limitations

Roger Hersch, Isaac Amidror

In a previous recent paper we discussed the limitations of the Fourier-based model in the prediction of visible moiré effects. Here, we extend the discussion to other mathematical models that are also being used in the moiré theory: the classical indicial ...

2010

Authentication with built-in encryption by using moire parallax effects between fixed correlated s-random layers

Isaac Amidror, Roger Hersch

This invention discloses new methods and security devices for authenticating documents and valuable products which may be applied to any support, including transparent synthetic materials and traditional opaque materials such as paper. The invention relate ...

2009

The role of Fourier theory and of modulation in the prediction of visible moiré effects

Roger Hersch, Isaac Amidror

Modern moiré theory is largely based on the Fourier approach. And yet, it seems that the Fourier theory by itself cannot answer all questions related to moiré effects. We present some visible phenomena in the superposition of periodic structures (such as l ...

2009

Authentication with built-in encryption by using moire intensity profiles between random layers

Isaac Amidror

This invention discloses new methods, security devices and apparatuses for authenticating documents and valuable articles which may be applied to any support, including transparent synthetic materials and traditional opaque materials such as paper. The inv ...

2006

Analysis of moiré patterns in multi-layer superpositions

Isaac Amidror

EPFL1995