Research on Depth Localization of Non-Line-of-Sight Hidden Objects Based on Time Delay Estimation
Non-line-of-sight imaging technology is a technology to detect and image objects that cannot be seen in the direct line of sight(such as hidden targets around corners).Imaging technology based on the time of flight is mainly to detect depth images,which first needs to complete the depth localization of hidden targets,and then car-ries out their image reconstruction.This paper proposes to use the delay estimation algorithm to carry out the depth localization of hidden targets,and conducts two groups of experiments respectively to study the depth localization of hidden targets under different noise ratios(0,5,10 and 20 dB)according to the number of different hidden targets and the distance among hidden targets.The experimental results show that the depth localization error is also in-creasing when the distance among hidden targets is constantly becoming small,and the minimum distance among hidden targets is about 100 cm(the laser pulse is 1ns),and that the effect of noise on depth localization is small,and the error after denoising is reduced to 1～2 cm,which indicates that the delay estimation algorithm proposed in this paper has a certain ability to resist noise.
万方数据
维普
