Baumer TXG - Page 35

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Pixel depth: In general, pixel depth denes the number of possible different values for
each color channel. Mostly this will be 8 bit, which means 2
8
different "col-
ors".
For RGB or BGR these 8 bits per channel equal 24 bits overall.
Two bytes are needed for transmitting more than 8 bits per pixel - even if the
second byte is not completely lled with data. In order to save bandwidth, the
packed formats were introduced to Baumer TXG cameras. In this formats,
the unused bits of one pixel are lled with data from the next pixel.
8 bit:
Byte 1 Byte 2 Byte 3
10 bit:
Byte 1 Byte 2
unused bits
12 bit:
Byte 1 Byte 2
unused bits
Packed:
Byte 1 Byte 2 Byte 3
Pixel 0Pixel 1
◄Figure29
Bit string of Mono 8 bit
and RGB 8 bit.
◄Figure33
Spreading of Mono 12
bit over two bytes.
◄Figure30
Spreading of Mono 10
bit over 2 bytes.
◄Figure32
Spreading of two pix-
els in Mono 12 bit over
three bytes (packed
mode).