Decoding composite images of three-dimensional objects by convolution
US4023037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1975 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Mar 13, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of decoding composite images of three-dimensional objects which are coded by means of a large number of radiation souces of different perspective and which are decoded by means of a point hologram. The point hologram is produced by means of a flat reference beam and by illuminating a shadow mask in the converging beam. The coordinates of the shadow mask correspond to the point image of the source distribution recorded by a hole camera, while the coordinate differences of the holes of the shadow mask have the same value, or a value increased to scale, with respect to the coordinate differences of the point image function of the object plane of the composite image which was nearest to the source distribution during the recording. The decoding of the composite image is effected by shifting between an illumination lens and the point hologram in an incoherent monochromatic converging beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.