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Application of Coordinate Mapping on Estimating Grain Storgae Volume
Reconstruction of 3-D Model
Using a measurement instrument developed in this study, the three-dimensional models of grain stored in granary were setup and their volumes were estimated. As measuring one object from two different perspectives, the common points at the bottom of the object were measured, and they were mapped into the same coordinate system by quaternion approach. The measuring points were first projected on the ground, and their triangular meshes were established with Delaunay triangulation. Once the triangular meshes were obtained, their original heights can be traced back. The triangular prisms were then constructed, finally rebuilding three-dimensional model was completed, and the volumes were calculated. Measuring the volume of objects with known-volume was done first, and the average relative errors rate of 2% or less was obtained. Two piles of grain stored in the granary at Tali District Farmer's Association of Taichung were investigated. Different combinations of measured points were tested. According to the results, increasing the number of tiers of measured points can obtain more accurate volume value.
|Appears in Collections:||第63卷 第01期|
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