Baumer VEXG, Руководство пользователя

Страница: 38 / 68

38
Pixel depth: In general, pixel depth defines 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 filled with data. In order to save bandwidth, the
packed formats were introduced to Baumer VEX cameras. In this formats,
the unused bits of one pixel are filled with data from the next pixel.
8 bit:
Byte 1 Byte 2 Byte 3
12 bit:
Byte 1 Byte 2
unused bits
Packed:
Byte 1 Byte 2 Byte 3
Pixel 0 Pixel 1
8.1.2.2 Pixel Formats VEXG
Camera Type Mono8 Mono10 Mono12 Mono12p Bayer RG8 Bayer RG10 Bayer RG12 Bayer RG129
Monochrome
VEXG-02M ■ ■ □ □ □ □ □ □
VEXG-13M ■ ■ □ □ □ □ □ □
VEXG-25M ■ ■ □ □ □ □ □
VEXG-52M.R ■ □ ■ ■ □ □ □ □
VEXG-100M.R ■ □ ■ ■ □ □ □ □
Color
VEXG-02C □ □ □ □ ■ ■ □ □
VEXG-13C □ □ □ □ ■ ■ □ □
VEXG-25C □ □ □ □ ■ ■ □ □
VEXG-52C.R □ □ □ □ ■ □ ■ ■
VEXG-100C.R □ □ □ □ ■ □ ■ ■
Figure 13 ►
Bit string of Mono 8 bit
and RGB 8 bit.
Figure 14 ►
Spreading of Mono 12
bit over two bytes.
Figure 15 ►
Spreading of two pix-
els in Mono 12 bit over
three bytes (packed
mode).