Xiongzhe Han

TL;DR: The feasibility of using structure from motion on images collected from 120 m above ground level (AGL) with a fixed-wing unmanned aerial vehicle (UAV) to estimate sorghum plant height with reasonable accuracy on a relatively large farm field is indicated.

TL;DR: This study examines the development of a computer simulator capable of virtually testing the motion of a tractor based on a look-ahead distance method in a real-time 3D graphic environment and found an oscillation in the steering angle might be related to the limitations of the electric motor in controlling the tractor's hydraulic steering system.

TL;DR: A simulation study conducted using a 3D computer simulator that accounts for the slippery motion of a virtual tractor on ground with varying adherence properties confirmed that the slip estimation-based path-tracking algorithm was superior in guiding the tractor along curved paths on the ground with relatively low coefficients of cornering stiffness.

TL;DR: In this paper, the ability of two different image processing methods, i.e., morphological and pixel-value analysis methods, to measure the fresh weight of lettuce grown in a closed hydroponic system was analyzed.

TL;DR: In this article, the authors proposed a path generation and tracking algorithm for an auto-guided Korean tractor with a tillage implement that generates a path with C-type turns and follows the generated path in a paddy field.