System for Screening Objectionable Images Using Daubechies' Wavelets and Color Histograms

A power steering mechanism including an actuator having two actuating chambers operatively connected to vehicle wheels, a changeover control valve for alternatively connecting one actuating chamber to a pump and for connecting the other actuating chamber to a reservoir depending upon the direction of rotation of the steering wheel. A reaction means transmits a rotating resistance to the steering wheel in accordance with the discharging pressure of the pump, while various means are disposed within the connecting passageway for controlling the flow of fluid in an amount which is proportional to the vehicle speed, whereby the sudden restoration of the steering wheel, when the vehicle is running at a high rate of speed, is prevented.