  Optically focusing and imaging through strongly scattering media are
challenging tasks but have widespread applications from scientific research to
biomedical applications and daily life. Benefiting from the memory effect (ME)
for speckle intensity correlations, only one single-shot speckle pattern can be
used for the high quality recovery of the objects and avoiding some complicated
procedures to reduce scattering effects. In spite of all the spatial
information from a large object being embedded in a single speckle image, ME
gives a strict limitation to the field of view (FOV) for imaging through
scattering media. Objects beyond the ME region cannot be recovered and only
produce unwanted speckle patterns, causing reduction in the speckle contrast
and recovery quality. Here, we extract the spatial information by utilizing
these unavoidable speckle patterns, and enlarge the FOV of the optical imaging
system. Regional point spreading functions (PSFs), which are fixed and only
need to be recorded once for all time use, are employed to recover
corresponding spatial regions of an object by deconvolution algorithm. Then an
automatic weighted averaging in an iterative process is performed to obtain the
object with significantly enlarged FOV. Our results present an important step
toward an advanced imaging technique with strongly scattering media.
