Patent · US Expired

Image coding and decoding using coherent codes

US4118099A · kind A · utility

9Cited by

1References

6Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Hermann Weiss · Hamburg, DE
Erhard Klotz · Halstenbek, DE
Ulf Tiemens · Pinneberg, DE

Key dates

Filing date	Aug 5, 1976
Grant date	Oct 3, 1978
Priority date	—
Expiry date	Aug 5, 1996

Classification

Technology area (CPC H)Electricity
CPC primaryH01F10/147
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material. Negatives of the two images are produced, after which the positive of one image is combined with the negative of the other image, the combined images being subsequently multiplied by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, the two multiplied images being superposed in one plane, the coded images being decoded by changing their scale with the aid of two synchronously controlled zoom lenses whereby the coordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.