Laurenzis Martin, Bacher Emmanuel
French-German Research Institute of Saint-Louis, 5 Rue du General Cassagnou, 68301 Saint-Louis, France.
Appl Opt. 2011 Jul 20;50(21):3824-8. doi: 10.1364/AO.50.003824.
In the present paper we discuss the method of image coding by multiple exposure of range-gated images. This method enlarges the depth mapping range of range-gated imaging systems exponentially with the number of utilized images. We developed a theoretical model to give a precise prediction of the number of permutations that can be used for image coding. For what we believe is the first time, we realized an image coding sequence for three range-gated images to enlarge the depth mapping range by a factor of 12. We demonstrate three-dimensional imaging in a range of 460 to 1000 m using a laser pulse width of 300 ns. Because of the impact of noise, a critical linking error occurs during the encoding of the intensity images. It is possible to reduce this error by the application of effective noise reduction strategies and the use of a threshold value to the tolerance drift of intensity levels.
在本文中，我们讨论了通过距离选通图像的多次曝光进行图像编码的方法。该方法随着所使用图像的数量，以指数方式扩大距离选通成像系统的深度映射范围。我们开发了一个理论模型，以精确预测可用于图像编码的排列数。据我们所知，我们首次实现了用于三个距离选通图像的图像编码序列，将深度映射范围扩大了12倍。我们使用300 ns的激光脉冲宽度，展示了在460至1000 m范围内的三维成像。由于噪声的影响，在强度图像编码期间会出现严重的链接错误。通过应用有效的降噪策略以及对强度水平的容差漂移使用阈值，可以减少此错误。
