High quality color imaging requires the sampling of three spectral
bands at the same position and at the same time. While solutions exist
the most common setup is based on a trick: a lattice of pixels, whose
over number corresponds to the sensor resolution, is split into three
different groups. The pixels of each group are covered with a small
color filter. The result is that spectral information is not spatially
aligned: each pixel only has information on one color. Full color
information must then be recovered using interpolation techniques and
the result is different from what would be obtained with full
resolution color imaging especially in the proximity of color
discontinuities.
40#40
[width=10cm]figures/mosaicImage.jpg
[width=10cm]figures/deltaImage.jpg
[width=10cm]figures/errorRow.jpg |