Pascal Bourdon

A metamerism-based method to prevent camcorder movie piracy in digital theaters

This document proposes a new, multi-primary projection system for prevention of illegal recordings in movie theaters. As of today, most camcorder-jamming methods tend to rely on either Infra-Red or spatial/temporal light modulations, both being easy to defeat using an appropriate filter system. Like Infra-Red, a metamerism-based system will modulate light magnitude depending on wavelength, but this time within the range of visible light, making jamming patterns harder to filter out. The mathematical model we use to solve our problem can actually serve as a generic model for all spectrum-based methods, including IR.

A theoretical analysis of spatial/temporal modulation-based systems for prevention of illegal recordings in movie theaters

This document proposes a convenient theoretical analysis of light modulation-based systems for prevention of illegal recordings in movie theaters. Although the works presented in this paper do not solve the problem of camcorder piracy, people in the security community may find them interesting for further work in this area.