Camera visual axis disturbance measuring equipment and method based on inertial reference unit

Abstract

The invention discloses camera visual axis disturbance measuring equipment and method based on an inertial reference unit. The measuring equipment is composed of a high-precision inertial reference unit and an associated measuring unit. The inertial reference unit generally adopts a fiber-optic gyroscope, an angular displacement sensor and the like, and can accurately measure absolute angular displacement information at a mounting position; the associated measuring unit can accurately measure the relative angular displacement information between the visual axis of the camera and the inertial reference unit; the absolute angular displacement information of the camera, namely the visual axis disturbance quantity of the camera, can be obtained by combining the two sets of angular displacementinformation, the information can be used for image motion blur compensation, and the imaging quality of the long-focus space camera is improved.

Description

technical field [0001] The invention relates to the technical field of high-resolution space optical remote sensing, in particular to a camera visual axis disturbance measurement device and method based on an inertial reference unit. Background technique [0002] The high-resolution space camera has the characteristics of long focal length, and a slight perturbation of the visual axis will also cause significant image blur and affect the imaging quality. In order to eliminate the influence of the boresight disturbance of the space camera on the image quality, it is necessary to accurately measure the boresight disturbance of the space camera, and realize the compensation and correction of the boresight disturbance by means of image processing or optical-mechanical image stabilization. [0003] The traditional boresight disturbance measurement method mainly adopts the boresight disturbance measurement method based on the observation target or auxiliary beacon image, that is, ...

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Problems solved by technology

[0005] 1) The traditional boresight perturbation measurement method based on ground object images is highly dependent on the texture information of ground objects and meteorological conditions. The contrast of local objects is poor, and when there is cloud and fog interference, the accuracy of boresight disturbance measurement is poor or even Not working, poor usability;

[0006] 2) The traditional boresight perturbation measurement method based on ground object images, for the push-broom imaging space camera, the signal-to-noise ratio of the boresight perturbation measurement detector is very low, which affects the measurement accuracy of the boresight perturbation;

[0007] 3) The ground object images obtained by the push-broom imaging space camera and the boresight disturbance measurement detector are constantly changing, and the correlation is poor, which affects the measurement effect of the boresight disturbance;

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