Elevation Angle Estimation in 2D Acoustic Images Using Pseudo Front View

Elevation Angle Estimation in 2D Acoustic Images Using Pseudo Front View
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使用伪前视图进行 2D 声学图像中的仰角估计

DOI:
10.1109/lra.2021.3058911
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发表时间:
2021
影响因子:
5.2
通讯作者:
Asama Hajime
Asama Hajime
中科院分区:
计算机科学2区
文献类型:
--
作者:
Wang Yusheng;Ji Yonghoon;Liu Dingyu;Tsuchiya Hiroshi;Yamashita Atsushi;Asama Hajime

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提出了一种用于二维声学图像三维重建的缺失维数估计方法。声学相机可以在不受水浊度和光照影响的水下环境中获取高分辨率的二维图像。然而,声图像的表述导致了缺失维数问题。未知仰角尺寸的估计是近年来研究人员关注的一个难点问题。三维点与二维像素之间的非双客观特性增加了问题的复杂性。本文提出了一种新的仰角估计方法。该方法利用深度神经网络将声学视图转换为伪前视图。该网络可以估计缺失维数并解决二维-三维对应的非双射问题。由于在水下环境中难以获取深度信息,因此使用模拟图像对网络进行训练。为了缓解模拟与真实之间的差距,采用了一种神经风格迁移方法来生成真实的图像数据集进行训练。仿真实验验证了该方法的可行性。
A novel method to estimate the missing dimension in 2D acoustic images for 3D reconstruction is proposed in this paper. Acoustic cameras can acquire high resolution 2D images in underwater environment insusceptible to water turbidity and light condition. However, the formulation of acoustic images leads to the missing dimension problem. Estimating the unknown elevation angle dimension is a difficult task which has recently drawn the attention of researchers. The non-bijective characteristic between 3D points and 2D pixels increases the complexity of the problem. In this paper, a novel elevation angle estimation method is proposed. The method transfers the acoustic view to pseudo front view using a deep neural network. The proposed network can estimate the missing dimension and resolve the non-bijection problem of the 2D-3D correspondence. Because of the difficulty of acquiring depth information in underwater environments, the network is trained using simulated images. To mitigate the sim-real gap, a neural style transfer method is implemented to generate a realistic image dataset for training. Simulation experiments were carried out for evaluation and real data proved the feasibility of the proposed method.
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