Method for integrating a synthetic hologram in a halftone image

US9606507B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventor

• Christophe Martinez · Grenoble, FR

Key dates

• Filing date: Nov 28, 2012
• Grant date: Mar 28, 2017
• Expiry date: Dec 6, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2260/63
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method for integrating a synthetic hologram in an image of a scene, including: forming, from a first image of the scene, a first matrix including pixels of two shades according to the gray level of the corresponding pixel of the first image, and a second matrix, image of the gray level difference between the corresponding pixels of the first image and of the first matrix; forming a third matrix based on a second image; forming a fourth matrix having each pixel including a central area with a surface area determined by the corresponding element of the second matrix and off-centered in the pixel according to the corresponding pixel of the third matrix; and performing a lithography of an opaque layer at the surface of a plate according to the pattern defined by the fourth pixel matrix.