Imaging through scattering media with dimensional measuring and 3D positioning

Non-invasive imaging has emerged as a prominent research direction in the field of imaging through scattering media. Nonetheless, determining the 3D position and size of a hidden object still remains a challenging task. In this study, we propose a novel method to solve this problem. Specifically, based on the wavelength dependence of the point spread function, a scaling center can be computed from two speckle patterns detected with different wavelengths and thus an optical axis is found. Then, the 3D position of the hidden object can be estimated from two optical axes corresponding to different apertures. Combined with the speckle correlation and phase retrieval algorithms, the image and size of the object can be obtained. Simulations and experiments have verified the effectiveness of the proposed method, which provides more possibilities for some studies such as remote sensing and target tracking through scattering media, etc.