Process for correcting a video signal with a view to compensating for the differences in lighting and devices for its implementation

申请公布号：FR2647617(A1)

申请号：FR19890007218

申请日期：1989.05.29

申请公布日期：1990.11.30

申请人：

BEGASSE PIERRE

分类号：H04N5/235;H04N5/243

主分类号：H04N5/235

摘要：The invention relates to a process for correcting a video signal with a view to compensating for the differences in lighting and devices for its implementation. The process is characterised in that it consists in averaging the video signal and, after a possible levelling of the averaged signal, in correcting with the aid of the averaged signal, the video signal by an attenuation proportional to its amplitude, before sending it to the downstream processing circuits. Application to the computer-processing of video signals. <IMAGE>

ADHESIVE TOOTHBRUSH WITH CLEANING AGENT

IMPROVEMENTS IN OR RELATING TO ORGANIC COMPOUNDS

WIPER BLADE

AQUEOUS COATING COMPOSITIONS

EXTENDABLE POLYMER FILM

TIMING DEVICES

A TEST CIRCUIT FOR TESTING A MEMORY DEVICE AND METHODS FOR PERFORMING WRITING AND TESTING IN SUCH DEVICES

NOVEL CELL GROWTH MEDIUM COMPONENTS AND PROCESS FOR PRODUCING SAME

IMPROVEMENTS IN SECURITY DEVICES

DEVICE FOR PREPARING INSTANT DRINKS

TEXTILE TREATMENT

FASTENING DEVICE FOR A DOOR

ANTI-PUCKER THREAD TENSIONING DEVICE

THERAPEUTIC AGENTS

MULTI LIFTER

GRIPPER FOR AXMINSTER CARPET LOOM

MANUFACTURE OF COMMUNICATION CABLES

SAETT VID TILLVERKNING AV ETT MAETORGAN OCH ETT MAETORGAN TILLVERKAT I ENLIGHET DAERMED

THICKENED AQUEOUS HARD SURFACE CLEANER

ROTABLE CONTACTLESS ANTENNA COUPLER AND ANTENNA