Image stabilizing apparatus for a portable video camera
First Claim
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1. An image stabilization apparatus for a portable video camera comprising:
- lens means, having an optical axis z, for projecting an image onto a plane extending in x and y directions perpendicular to said optical axis z;
photosensitive means, responsive to x and y direction scanning signals, for analyzing said image along x and y axes;
electrical means for supplying said x and y direction scanning signals; and
at least one measuring means for supplying signal values to said electrical means to control said x and y direction scanning signals, said at least one measuring means including gyrometric means for sensing the angular velocity of the camera body about one of said x, y and z axes and producing a corresponding output value, and integrator means, responsive to said output value from said gyrometric means, for deriving an angle of rotation value from said angular velocity value and for feeding said angle of rotation value to said electrical means to control said x and y scanning signals, said integrator means supplying an integrated output value of said angular velocity value for rapid movements of said camera body and providing a slow automatic return to zero of its output value when said angular velocity value is low.
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Abstract
The image stabilization apparatus for a portable video camera is such that for angular variations about the optical axis of the camera, the horizontal and vertical deflection currents Ix and Iy of the camera are converted as a function of these variations by an angular measurement device integrally connected with the camera prior to being applied to the corresponding horizontal and vertical deflection coils of the camera.
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Citations
8 Claims
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1. An image stabilization apparatus for a portable video camera comprising:
- lens means, having an optical axis z, for projecting an image onto a plane extending in x and y directions perpendicular to said optical axis z;
photosensitive means, responsive to x and y direction scanning signals, for analyzing said image along x and y axes;
electrical means for supplying said x and y direction scanning signals; and
at least one measuring means for supplying signal values to said electrical means to control said x and y direction scanning signals, said at least one measuring means including gyrometric means for sensing the angular velocity of the camera body about one of said x, y and z axes and producing a corresponding output value, and integrator means, responsive to said output value from said gyrometric means, for deriving an angle of rotation value from said angular velocity value and for feeding said angle of rotation value to said electrical means to control said x and y scanning signals, said integrator means supplying an integrated output value of said angular velocity value for rapid movements of said camera body and providing a slow automatic return to zero of its output value when said angular velocity value is low. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- lens means, having an optical axis z, for projecting an image onto a plane extending in x and y directions perpendicular to said optical axis z;
Specification