Method and apparatus for producing a composite still picture of a moving object in successive positions
US4005261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Nov 20, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/807
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A storage-type image pick-up tube having a shutter associated therewith and a memory device are synchronously operated to produce a composite video signal which, when repeatedly applied to a video monitor or other image display device, provides a composite still picture of a moving object in an initial position and changes from such position at intervals over a period of time. The synchronous operations comprise a first step of opening the shutter while operating the pick-up tube to pick-up an image of the object in its initial position and to produce a corresponding first video signal which is simultaneously stored in the memory device, a second step of closing the shutter while reading-out any signal previously stored in the memory device and storing the read-out signal in the pick-up tube, a third step of opening the shutter while operating the pick-up tube to pick-up an image of the object in a subsequent position and to produce a corresponding signal from which the signal then stored in the pick-up tube is subtracted for providing a resultant signal which is stored in the memory device in superposed relation to the signal previously stored in the memory device, and repeating t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.