Matrox Rapixo CL Pro, Installation And Hardware Reference, Page: 55 / 96

Data conversion 55
Image data can be converted as follows:
The equations for the YUV16 conversion are described in the following table. The
value of
depth is either 8 or 16 when converting BGR24 or BGR48 data,
respectively. Note that while performing BGR48-to-YUV color space conversion,
the operations are carried out on 16-bit data; then, each resulting YUV component
is bit-shifted right by 8 bits ( >> (
depth - 8) where the value of depth is 16).
Input format Output format
8-bit
monochrome 16-bit
monochrome 24-bit
packed
BGR 32-bit
packed
BGRa 48-bit
packed
BGR 16-bit
YUV
(YUYV) 24-bit
RGB
planar 48-bit
RGB
planar
8-bit monochrome yes yes yes yes yes
16-bit monochrome yes yes yes yes yes yes yes yes
24-bit packed BGR yes yes yes yes yes
48-bit packed BGR yes yes yes yes yes yes yes yes
Color space conversion Equations
BGR-to-YUV • Y = (0.114B + 0.587G +0.299R) >>(depth - 8)
• U = (0.500B - 0.331G - 0.169R + 2
(depth-1)
) >>(depth - 8)
• V = (-0.081B - 0.419G + 0.500R + 2
(depth-1)
) >>(depth - 8)