Aguilar Ritz Ann, Hermosa Nathaniel, Soriano Maricor
Appl Opt. 2022 Jan 1;61(1):253-261. doi: 10.1364/AO.447910.
We achieved three-dimensional (3D) computational ghost imaging with multiple photoresistors serving as single-pixel detectors using the semi-calibrated lighting approach. We performed imaging in the spatial frequency domain by having each photoresistor obtain the Fourier spectrum of the scene at a low spectral coverage ratio of 5%. To retrieve a depth map of a scene, we inverted, apodized, and applied semi-calibrated photometric stereo (SCPS) to the spectra. At least 93.5% accuracy was achieved for the 3D results of the apodized set of images applied with SCPS in comparison with the ground truth. Furthermore, intensity error map statistics obtained at least 97.0% accuracy for the estimated surface normals using our method. Our system does not need special calibration objects or any additional optical components to perform accurate 3D imaging, making it easily adaptable. Our method can be applied in current imaging systems where multiple detectors operating at any wavelength are used for two-dimensional (2D) imaging, such as imaging cosmological objects. Employing the idea of changing light patterns to illuminate a target scene and having stored information about these patterns, the data retrieved by one detector will give the 2D information while the multiple-detector system can be used to get a 3D profile.
我们使用半校准照明方法，通过多个用作单像素探测器的光敏电阻实现了三维（3D）计算鬼成像。我们在空间频率域中进行成像，每个光敏电阻以5%的低光谱覆盖率获取场景的傅里叶光谱。为了获取场景的深度图，我们对光谱进行反演、变迹，并应用半校准光度立体视觉（SCPS）。与真实情况相比，应用SCPS的变迹图像集的3D结果的准确率至少达到了93.5%。此外，使用我们的方法，强度误差图统计对于估计的表面法线至少达到了97.0%的准确率。我们的系统不需要特殊的校准物体或任何额外的光学组件就能进行精确的3D成像，使其易于适配。我们的方法可应用于当前的成像系统，在这些系统中，多个在任何波长下工作的探测器用于二维（2D）成像，比如对宇宙物体成像。利用改变光模式来照亮目标场景并存储有关这些模式信息的想法，一个探测器检索到的数据将给出2D信息，而多探测器系统可用于获取3D轮廓。
