Autoregistration system for color TV cameras
US4507678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Aug 20, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An autoregistration system is disclosed for a color television camera equipped with a plurality of image pickup devices so as to combine picture signals obtained through the plurality of channels from the plurality of image pickup devices into a composite color television signal. The autoregistration system comprises means for producing a level difference signal representing a predetermined difference in level between the picture signals of desired two channels, between which a picture image registration is to be carried out, and a first and second edge signals of the two channels; and means for subjecting the level difference signal and first and second edge signals to an operational processing to obtain a discriminatory signal representing the direction of a registration offset between the picture signals of the two channels. The above autoregistration system is employed to perform with ease the registration automatically whenever needed, without need for any special optical pickup unit having a built-in test pattern. The autoregistration system is particularly suited for portable color TV cameras which are frequently exposed to varying use conditions. Owing to the obviation of s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.