Matwyschuk Alexis
Appl Opt. 2016 May 10;55(14):3782-6. doi: 10.1364/AO.55.003782.
The tomography executed with mono-wavelength active imaging systems uses the recording of several images to restore a three-dimensional (3D) scene. Thus, in order to show the depth in the scene, a different color is attributed to each recorded image. Therefore, the 3D restoration depends on the video frame rate of the camera. By using a multiple-wavelength range-gated active imaging system, it is possible to restore the 3D scene directly in a single image at the moment of recording with a video camera. Each emitted light pulse with a different wavelength corresponds to a visualized zone at a different distance in the scene. The camera shutter opens just once during the emission of light pulses with the different wavelengths. Thus, the restoration can be executed in real time with regard to the video frame rate of the camera. From an analytical model and from a graphical approach, we demonstrated the feasibility of this new method of 3D restoration. The non-overlapping conditions between two consecutive visualized zones are analyzed. The experimental test results confirm these different conditions and validate the theoretical principle to directly restore the 3D scene in a color image with a multiple-wavelength laser source, an RGB filter, and a triggerable intensified camera.
使用单波长主动成像系统进行的层析成像通过记录多幅图像来重建三维（3D）场景。因此，为了显示场景中的深度，会为每幅记录的图像赋予不同的颜色。所以，3D重建取决于相机的视频帧率。通过使用多波长距离选通主动成像系统，在使用摄像机记录时，可以直接在单幅图像中重建3D场景。每个具有不同波长的发射光脉冲对应于场景中不同距离处的一个可视化区域。在发射不同波长的光脉冲期间，相机快门仅打开一次。因此，可以根据相机的视频帧率实时进行重建。通过解析模型和图形方法，我们证明了这种新的3D重建方法的可行性。分析了两个连续可视化区域之间的非重叠条件。实验测试结果证实了这些不同条件，并验证了使用多波长激光源、RGB滤波器和可触发增强型相机直接在彩色图像中重建3D场景的理论原理。
