Baumer EXG03 - Pixel Format

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4.1.2 PixelFormat
On Baumer digital cameras the pixel format depends on the selected image format.
4.1.2.1 Denitions
RAW: Raw data format. Here the data are stored without processing.
Bayer: Raw data format of color sensors.
Color lters are placed on these sensors in a checkerboard pattern, generally
in a 50% green, 25% red and 25% blue array.
Mono: Monochrome. The color range of mono images consists of shades of a single
color. In general, shades of gray or black-and-white are synonyms for mono-
chrome�
RGB: Color model, in which all detectable colors are dened by three coordinates,
Red, Green and Blue.
Red
Gree
n
Blue
Black
White
The three coordinates are displayed within the buffer in the order R, G, B.
BGR: Here the color alignment mirrors RGB.
YUV: Color model, which is used in the PAL TV standard and in image compression.
In YUV, a high bandwidth luminance signal (Y: luma information) is transmitted
together with two color difference signals with low bandwidth (U and V: chroma
information). Thereby U represents the difference between blue and luminance
(U = B - Y), V is the difference between red and luminance (V = R - Y). The third
color, green, does not need to be transmitted, its value can be calculated from
the other three values.
YUV 4:4:4 Here each of the three components has the same sample rate.
Therefore there is no subsampling here.
YUV 4:2:2 The chroma components are sampled at half the sample rate.
This reduces the necessary bandwidth to two-thirds (in relation to
4:4:4) and causes no, or low visual differences.
YUV 4:1:1 Here the chroma components are sampled at a quater of the
sample rate.This decreases the necessary bandwith by half (in
relation to 4:4:4).
◄Figure9
Sensor with Bayer
Pattern
◄Figure10
RBG color space dis-
played as color tube.