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IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 14, NO.4, APRIL 2005 1 Abstract--There is an analogy between single-chip color
 

Summary: IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 14, NO.4, APRIL 2005 1
Abstract-- There is an analogy between single-chip color
cameras and the human visual system in that these two
systems acquire only one limited wavelength sensitivity band
per spatial location. We have exploited this analogy, defining
a model that characterizes a one-color per spatial position
image as a coding into luminance and chrominance of the
corresponding three-colors per spatial position image.
Luminance is defined with full spatial resolution while
chrominance contains sub-sampled opponent colors.
Moreover, luminance and chrominance follow a particular
arrangement in the Fourier domain, allowing for
demosaicing by spatial frequency filtering. This model shows
that visual artifacts after demosaicing are due to aliasing
between luminance and chrominance and could be solved
using a pre-processing filter. This approach also gives new
insights for the representation of single-color pe r spatial
location images and enables formal and controllable
procedures to design demosaicing algorithms that perform
well compared to concurrent approaches, as demonstrated by

  

Source: Alleysson, David - Laboratoire de Psychologie et NeuroCognition, Université Pierre Mendes France

 

Collections: Biology and Medicine