  The contrast of an image can be degraded by the presence of background light
and sensor noise. To overcome this degradation, quantum illumination protocols
have been theorised (Science 321 (2008), Physics Review Letters 101 (2008))
that exploit the spatial correlations between photon-pairs. Here we demonstrate
the first full-field imaging system using quantum illumination, by an enhanced
detection protocol. With our current technology we achieve a rejection of
background and stray light of order 5 and also report an image contrast
improvement up to a factor of 5.5, which is resilient to both environmental
noise and transmission losses. The quantum illumination protocol differs from
usual quantum schemes in that the advantage is maintained even in the presence
of noise and loss. Our approach may enable laboratory-based quantum imaging to
be applied to real-world applications where the suppression of background light
and noise is important, such as imaging under low-photon flux and quantum
LIDAR.
