  A limitation of many compressive imaging architectures lies in the sequential
nature of the sensing process, which leads to long sensing times. In this paper
we present a novel architecture that uses fewer detectors than the number of
reconstructed pixels and is able to acquire the image in a single acquisition.
This paves the way for the development of video architectures that acquire
several frames per second. We specifically address the diffraction problem,
showing that deconvolution normally used to recover diffraction blur can be
replaced by convolution of the sensing matrix, and how measurements of a 0/1
physical sensing matrix can be converted to -1/1 compressive sensing matrix
without any extra acquisitions. Simulations of our architecture show that the
image quality is comparable to that of a classic Compressive Imaging camera,
whereas the proposed architecture avoids long acquisition times due to
sequential sensing. This one-shot procedure also allows to employ a fixed
sensing matrix instead of a complex device such as a Digital Micro Mirror array
or Spatial Light Modulator. It also enables imaging at bandwidths where these
are not efficient.
