Development of acoustic camera-imaging simulator based on novel model
Development of acoustic camera-imaging simulator based on novel model
复制标题
基于新模型的声学相机成像模拟器的开发
DOI：
10.1109/eeeic.2015.7165431
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
H. Asama
中科院分区：
文献类型：
--
作者：
Seungchul Kwak;Yonghoon Ji;A. Yamashita;H. Asama
从水下环境中获取精确的图像信息对于水下任务，如维护，检查，轨迹估计，目标识别和SLAM（同时定位和映射）是必不可少的。在这方面，声学相机是上级设备，因为即使在浑浊的水中，它也可以提供比光学相机提供的图像具有更精确细节的图像。然而，声学图像的结构与光学图像的结构非常不同，因为声学摄像机提供了距离和方位角数据的序列，而仰角数据缺失。因此，它是很难产生模拟的声学图像，虽然模拟逼真的图像是至关重要的，所提出的算法的性能验证和节省成本和时间。本文介绍了声成像的基本原理和声成像的几何模型，为研制声成像模拟器提供了理论依据。与最先进的技术相比，我们的方法在以完整的灰度表示模拟声学图像方面表现出卓越的性能。我们通过与真实的声学图像进行比较来评估从开发的模拟器的模拟图像。实验结果表明，该模拟器能够根据上述原理生成逼真的虚拟声图像。
Acquisition of accurate image information from underwater environments is essential to operate underwater tasks such as maintenance, inspection, trajectory estimation, target recognition and SLAM (simultaneous localization and mapping). In this respect, an acoustic camera is superior device because it can provide images with more accurate details than what the optical cameras provide even in turbid water. However, the structure of the acoustic image is very dissimilar to that of optical image because the acoustic camera provides sequences of distance and azimuth angle data, which elevation angle data are missing. Consequently, it is difficult to generate simulated acoustic images although simulating realistic images is vital for verification for performance of proposed algorithms and saving costs and time. This paper describes the principles of acoustic natures and imaging geometry model of the acoustic camera which greatly contribute to developing simulator for the acoustic images. When compared to a state-of-the-art technique, our approach demonstrates surpassing performance in representing simulated acoustic images in complete gray-scale. We evaluate the simulated images from developed simulator by comparing with real acoustic images. The results indicate that the proposed simulator can generate realistic virtual acoustic images based on the principles.