Picture shake compensating circuit for video camera

Abstract

Abstract PURPOSE:To compensate the picture shake due to the shake of a video camera even at the time of zoom operation by providing a focal length detecting means and an amplifying means which amplifies the output of an integrator, which integrates the output of an angular speed sensor, with an amplification factor proportional to the focal length. CONSTITUTION:A focal length detecting circuit 13 detects the focal length changed by the zoom operation and outputs a signal to set an amplification factor (g) proportional to the focal length to amplifiers 11 and 12. The amplifier 11 amplifies a shake angle thetaV in the vertical direction outputted from an integrator 4 with the amplification factor (g) and supplies the result to an A/D converter 6. The amplifier 12 amplifies a shake angle thetaH in the horizontal direction outputted from an integrator 5 with the amplification factor (g) and gives the result to an A/D converter 7. An image pickup element control circuit 8 generates a control signal to select a desired area of the image pickup face of an image pickup element 10 based on angle signals from A/D converters 6 and 7 and gives this signal to the image pickup element 10. Thus, the picture shake due to the shake of the video camera is compensated.

Inventors

• 👤 Kazuto Nishida
• 👤 一人 西田

Bibliographic Details