Computational Intelligence Laboratory (CIL), University of Lincoln, Lincoln, UK; Machine Life and Intelligence Research Center, Guangzhou University, Guangzhou, China.
Machine Life and Intelligence Research Center, Guangzhou University, Guangzhou, China; Computational Intelligence Laboratory (CIL), University of Lincoln, Lincoln, UK.
Neural Netw. 2021 Apr;136:180-193. doi: 10.1016/j.neunet.2020.12.008. Epub 2020 Dec 28.
Efficient and robust motion perception systems are important pre-requisites for achieving visually guided flights in future micro air vehicles. As a source of inspiration, the visual neural networks of flying insects such as honeybee and Drosophila provide ideal examples on which to base artificial motion perception models. In this paper, we have used this approach to develop a novel method that solves the fundamental problem of estimating angular velocity for visually guided flights. Compared with previous models, our elementary motion detector (EMD) based model uses a separate texture estimation pathway to effectively decode angular velocity, and demonstrates considerable independence from the spatial frequency and contrast of the gratings. Using the Unity development platform the model is further tested for tunnel centering and terrain following paradigms in order to reproduce the visually guided flight behaviors of honeybees. In a series of controlled trials, the virtual bee utilizes the proposed angular velocity control schemes to accurately navigate through a patterned tunnel, maintaining a suitable distance from the undulating textured terrain. The results are consistent with both neuron spike recordings and behavioral path recordings of real honeybees, thereby demonstrating the model's potential for implementation in micro air vehicles which have only visual sensors.
高效、稳健的运动感知系统是实现未来微型飞行器视觉引导飞行的重要前提。作为灵感来源,蜜蜂和果蝇等飞行昆虫的视觉神经网络为基于人工的运动感知模型提供了理想的范例。在本文中,我们采用这种方法开发了一种新方法,该方法解决了视觉引导飞行中估计角速度的基本问题。与之前的模型相比,我们基于基本运动检测器 (EMD) 的模型使用单独的纹理估计途径来有效解码角速度,并展示了与光栅的空间频率和对比度相当大的独立性。我们使用 Unity 开发平台进一步测试了隧道居中和地形跟随范式,以再现蜜蜂的视觉引导飞行行为。在一系列对照试验中,虚拟蜜蜂利用所提出的角速度控制方案准确地在模式化隧道中导航,与波动纹理地形保持合适的距离。结果与真实蜜蜂的神经元尖峰记录和行为路径记录一致,从而证明了该模型在仅具有视觉传感器的微型飞行器中的应用潜力。