Calibration device for underwater three-dimensional observation system and calibration method

Abstract

The invention discloses a calibration device for an underwater three-dimensional observation system. The calibration device comprises a calibration plate moving device arranged on a glass water tank,a calibration plate fixed in the glass water tank through the calibration plate moving device, and binocular vision equipment arranged outside the glass water tank. The calibration plate moving devicecomprises a positioning track; the positioning rail is fixed at the top of the glass water tank through a hanging piece; the positioning rail comprises a group of rail short shafts and a group of rail long shafts which are oppositely arranged; a plurality of first clamping grooves are formed in the rail short shaft, the two ends of the moving rod are arranged on the rail short shaft of the positioning rail through the first clamping grooves, a plurality of sets of second clamping grooves are formed in the moving rod, the top end of the moving mechanism is detachably connected with the movingrod through the second clamping grooves, and the calibration plate is fixedly connected with the moving mechanism; the position of the calibration plate in the glass water tank is changed through themoving mechanism and the moving rod, and the binocular vision equipment acquires a sampling image of the calibration plate at the current position.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a calibration device and a calibration method for an underwater stereoscopic observation system. Background technique [0002] In aquaculture, it is often necessary to calibrate the target object in the glass tank. However, when the visual measurement method is used to reconstruct the three-dimensional object, the visual system and the measured object are often in the same medium environment (such as air), and in order not to disturb the fluid when calibrating in the glass water tank, the visual The system is placed outside the glass water tank and observes the movement of the target object in the water through the glass. Therefore, in addition to the medium of air, there are glass medium and water medium between the measured target and the visual system. Under the influence of these three different refractive index media, the original imaging optical path of the target object has cha...

AI Technical Summary

Problems solved by technology

Under the action of these three different refractive index media, the original imaging optical path of the target object has changed, and the reconstruction of the spatial coordinates of the target point by using the intersection of the image point positions at different angles through the straight line optical path will produce a large error

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