19 October 2006 Using orientation code matching for robustly sensing real velocity of agrimotors
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Instead of tachometer-type velocity sensors, an effective method of estimating real-time velocities based on a robust image matching algorithm is proposed to measure real-time velocities of agrimotors or working machines, such as sprayers and harvesters, driven by them in real farm fields. It should be precise even they have any slipping, and stable and robust to many ill-conditions occurred in the real world farm fields, where the robust and fast algorithm for image matching, Orientation code matching is effectively utilized. A prototype system has been designed for real-time estimation of velocities of the agrimotors and then the effectiveness has been verified through many frames obtained from the real fields in various weather and ground conditions.
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Kazuya Nakahara, Hidenori Takauji, Shun'ichi Kaneko, Takayuki Tanaka, Masashi Shimizu, Yukio Miyashita, "Using orientation code matching for robustly sensing real velocity of agrimotors", Proc. SPIE 6375, Optomechatronic Sensors, Instrumentation, and Computer-Vision Systems, 63750I (19 October 2006); doi: 10.1117/12.685841; https://doi.org/10.1117/12.685841

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