Experimental Calibration Method of CCD Camera in Binocular Passive Ranging
A passive ranging and camera calibration technology, applied in the field of ranging, can solve the problems affecting the ranging accuracy and low accuracy of passive ranging technology, and achieve the effects of faster processing, more processing and simple equipment
Inactive Publication Date: 2016-08-17
HEBEI HANGUANG HEAVY IND
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Problems solved by technology
The previous passive ranging technology has the disadvantage of low accuracy, especially the low accuracy of CCD camera experimental calibration, which affects the ranging accuracy of passive ranging technology
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[0009] Such as figure 1 , 2 As shown, the present invention comprises the following steps: 1. placing the left and right collimator tubes 4, 6 on the optical table 3; Observe with an autocollimator in the vertical direction, you can see the crosshairs, adjust the collimator continuously, when the crosshairs are on the center line of the autocollimator, the left collimator 4 is horizontal; ③, repeat step ②, put the right collimator Tube 6 adjusts the level; ④ Assemble the left and right CCD cameras 1 and 5 on the high-precision adjustment platform 2, adjust the left and right CCD cameras 1 and 5 so that the optical axes of the left and right CCD cameras 1 and 5 are respectively aligned with the left and right The optical axes of the right collimator 4 and 6 coincide, and it is considered that the optical axes of the left and right CCD cameras 1 and 5 are parallel; ⑤, the left and right CCD cameras 1 and 5 are connected to a PC to read images, extract corner points, Parameters...
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The invention provides an experimental calibration method for CCD (Charge Coupled Device) cameras in binocular passive ranging. The calibration method comprises the following steps: (1) placing a left collimator and a right collimator on an optic platform; (2) placing a pentagonal prism in front of the left collimator and observing by an auto collimation instrument in the direction approximately perpendicular to the collimators, wherein a cross line can be seen; and continuously adjusting the left collimator, wherein when the cross line is at the central line of the auto collimation instrument, the left collimator is horizontal; (3) repeating the step (2), and adjusting the right collimator to be horizontal; (4) assembling a left CCD camera and a right CCD camera on a high-precision adjusting platform, adjusting the left and right CCD cameras to enable the optic axes of the left and right CCD cameras to be coincided with the optic axes of the left and right collimators respectively so as to determine that the optic axes of the left and right CCD cameras are parallel; and (5) connecting the left and right CCD cameras with a PC, rotating the adjusting platform and recording the rotating angles. The CCD cameras can be calibrated with the high precision, and thus the ranging precision in a passive ranging technology is improved.
Description
technical field [0001] The invention belongs to distance measurement technology, in particular to a CCD camera experimental calibration method in binocular electric passive distance measurement. Background technique [0002] At present, photoelectric ranging technology is mainly divided into active ranging technology and passive ranging technology. Active ranging technology needs to actively emit artificial light to illuminate the measured target, and obtain the distance of the measured target by analyzing the texture deformation of the reflected light of the measured target or directly measuring the propagation time of light. Active ranging technology has disadvantages such as expensive equipment, complicated operation, and easy exposure. Passive ranging technology is to determine the distance of the measured target by detecting the natural light radiation of the object and analyzing it. The previous passive ranging technology has the disadvantage of low accuracy, especia...
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IPC IPC(8): G01C25/00G06T7/00
CPCG06T7/80
Inventor 王艳武因峰赵岩
Owner HEBEI HANGUANG HEAVY IND