| Summary: | 碩士 === 國立中興大學 === 土木工程學系所 === 104 === Through stereo vision, a 2D image can be reconstructed to a 3D model. The image parallax produced by two cameras can be used to restore position of a real object in the 3D space.
In this study, the Parallel Measuring Instrument and iPad Mini 2 Theodolite are used to aim at the feature object and estimate coordinates of 2 degree zone transverse Mercator projection of the object in the plane coordinate system. Through perspective stereo vision and correction of angles, the coordinates of the feature points are estimated according to the azimuth angle of the points and the object. The method for correction of angles assumes the two cameras have a deflection angle which is detected by the Parallel Measuring Instrument, and the angle may cause calculation of wrong depth of field. Thus, the distant feature object can be positioned by correcting the deflection angle.The calculated deflection angle of the cameras is θ=0.0845°±0.00465°.
After correction with a target, the non-target object can be shot. For the positioning within measurement distance of 200m, the range error is within 1%; for the positioning within 300m, the range error is within 2%.
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