Scattering medium is always a problem to be overcome in traditional optical imaging technology. In recent years, a speckle intensity correlation technique has been proposed to achieve high quality reconstruction of targets hidden in the scattering medium. Unfortunately, the imaging field of view (FOV) of this technology is seriously limited by the optical memory effect (OME) range. Here, we propose an iterative point-spread-function deconvolution (IPSFD) method to reconstruct multiple targets. According to the reversibility of the deconvolution algorithm, the IPSFD method starts from a small known target, and estimates the adjacent targets and point-spread-functions continuously by the iterative deconvolution algorithm, and finally reconstructs all targets within around three times the optical memory effect range. Theoretical and experimental results confirm that our method can achieve multi-target reconstruction of the single-shot large FOV speckle pattern. This method may have potential in practical applications biomedical imaging, astronomical imaging, and atmospheric turbulence imaging.
Direct detection imaging in complex, inhomogeneous media is a difficult challenge due to the existence of multiple scattering. One way used to extract the information of the object from the speckle pattern is to use speckle correlation based on the memory effect, and the object is recovered by an iterative phase retrieval algorithm. Here we report a new iterative phase retrieval algorithm that is referred to as the absolute output (AO) Gerchberg-Saxton algorithm and can single-shot ultra-fast reconstruct the object image. Different from the error reduction (ER) algorithm and hybrid input-output (HIO) algorithm, this algorithm does not need to satisfy the non-negative constraints. We experimentally demonstrate that the reconstructed image achieved by our algorithm is faster, more reliable, and more consistent. Our method has strong anti-interference ability, which has great potential in imaging through turbid medium such as fog and biological tissue.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.