Optically actuated automatic control system for windshield wiper of vehicles, has controller regulating actuation of wiper, when image intensity variance parameter output by signal processor exceeds threshold value

摘要

A photographic device (1) acquires predetermined set of windshield image data. A signal processor (2) processes the image data to generate an image intensity variance parameter and another parameter indicative of windshield obscuration. A controller (3) regulates actuation of wiper of windshield clearing subsystem, when the variance parameter exceeds the predetermined threshold value.