严重受限的水下视距是操纵遥控水下航行体的一个问题。结构紧凑、功率大、固态绿激光的应用,在同步立体扫描中引起新兴趣。然而,同步扫描的局限性是景深有限。而一种替代方法是利用非同步扫描技术。此种技术所获得的图像搜索和控制与扫描机构无关。文中介绍的不同的扫描方法和图像处理技术可在不同程度的混浊水域得到最大景深。 The severely restricted submarine line-of-sight is a problem with remotely controlled underwater vehicles. The compact, high-power, solid-state green laser application has sparked new interest in simultaneous stereo scans. However, the limitation of synchronous scanning is limited depth of field. An alternative is to use asynchronous scanning techniques. The image search and control acquired by this technique is not related to the scanning mechanism. The different scanning methods and image processing techniques introduced in this paper can get the maximum depth of field in different degrees of turbid waters.