Modeling 2-D Lens-Based Forward-Scan Sonar Imagery for Targets With Diffuse Reflectance
Modeling 2-D Lens-Based Forward-Scan Sonar Imagery for Targets With Diffuse Reflectance
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DOI：
10.1109/joe.2015.2503818
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发表时间：
2016-01
影响因子：
4.1
通讯作者：
M. D. Aykin;S. Negahdaripour
中科院分区：
文献类型：
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作者：
M. D. Aykin;S. Negahdaripour
声纳图像是通过发射声脉冲并测量从场景表面反射的声功率而形成的。声纳设备记录的信号编码了这些表面的形状和材料特性的信息。在本文中，我们提出了一个详细的推导的图像模型的一类新的高分辨率的镜头为基础的2-D前视声纳系统，场景/目标的漫反射率可以由朗伯模型。一个简化的单补丁模型一般考虑到有限的脉冲宽度的传输光束和同时到达的散射信号从多个补丁在同一范围内在一个给定的方位角方向。验证模型使用孤立的圆柱形目标的强度测量，然后，我们演示了应用程序从底部表面的圆柱形和球形目标的多径反射。
Sonar images are formed by transmitting acoustical pulses and measuring the reflected sound power from the scene surfaces. The recorded signal by a sonar device encodes information about the shape and material properties of these surfaces. In this paper, we present a detailed derivation of an image model for a new class of high-resolution lens-based 2-D forward-looking sonar systems, when the diffuse reflectance of scene/target can be characterized by the Lambertian model. A simplified single patch model is generalized to account for the finite pulse width of the transmitted beam and the simultaneous arrival of scattered signals from multiple patches at the same range in a given azimuthal direction. Validating the model using intensity measurements of isolated cylindrical targets, we then demonstrate application for multipath reflections from bottom surfaces with cylindrical and spherical targets.