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File: \examples\Processing\Color\Bayer\Laroche_modified_maVCL.va |
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Default Platform: mE5-MA-VCL |
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Short Description Resource optimized Bayer De-Mosaicing Algorithm According to Laroche |
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In this section we describe a slightly modified version of the Bayer demosaicing algorithm of 'Bayer De-Mosaicing Algorithm According to Laroche'. The only difference in the interpolation algorithm
(see Equation 8 to Equation 12) is, that the green color values
(
)
for the interpolation of the red and blue color values (Equation 10 to
Equation 12) are bilinearly interpolated. All other color interpolation steps are equivalent to the "original Laroche filter". In 'Bayer De-mosaicing '
the qualitative difference in the Bayer demosaicing results are presented. You can find the corresponding VisualApplets
example for the modified version under
\examples\Processing\Color\Bayer\Laroche_modified_maVCL.va. It is implemented for a microEnable 5 frame grabber for 8 bit
input bit depth and a parallelism of 2 but can easily adapted to a
version for a microEnable IV frame grabber, other input bit depths or parallelisms.
In the following shortly the modified parts in the VisualApplets design are presented. In Figure 293, 'Content of ColourInterpolation for the modified Laroche filter.'
you can see the content of the HierarchicalBox ColourInterpolation (see Figure 287, 'Interpolation step 1 of the Bayer-demosaicing process').
The red and blue color values are interpolated in the box RedandBlue out of a
) kernel of a Bayer pattern and the calculated green value
at the current pixel position. The calculation of the green value is done
in the HierarchicalBox GreenOut. Equivalent to the example in 'Bayer De-Mosaicing Algorithm According to Laroche' the color at the current pixel position is found in
whereAmI_Colour. All three color components are finally merged together.
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