Basler A640F, User Manual

Page: 51 / 188

Basic Operation & Standard Features
BASLER A640
f
3-29
DRAFT
3.6 Selectable 8 or 12 Bit Pixel Depth
When an
A640
f
camera is operating in Format 7, it can be set to output pixel data at either 8 bit
or 12 bit depth.
3.6.1 A641f Monochrome Cameras
Set the value in the Format field of the Current Video Format register (see page 4-24 ) and the
value in the Mode Field of the Current Video Mode register (see page 4-23 ) so that the camera
will operate in Format 7, Mode 0.
For 8 Bit Depth
Set the value in the Coding ID field of the Color Coding ID register for Format 7, Mode 0 to Mono
8 (see Section
3.9.2 and page 4-36 ). With this ID set, the camera outputs 8 bits per pixel.
For 12 Bit Depth
Set the value in the Coding ID field of the Color Coding ID register of Format 7, Mode 0 to Mono
16. With this ID set, the camera outputs 16 bits per pixel but only 12 bits are effective. The effective
pixel data fills from the LSB and the unused bits are filled with zeros. Pixel data is stored in the PC
memory in little endian format, i.e., the low byte for each pixel is stored at the lower address and
the high byte is stored at the neighboring higher address.
3.6.2 A641fc Color Cameras
Set the value in the Format field of the Current Video Format register (see page 4-24 ) and the
value in the Mode Field of the Current Video Mode register (see page 4-23 ) so that the camera
will operate in Format 7, Mode 0.
For 8 Bit Depth,
Set the value in the Coding ID field of the Color Coding ID register for Format 7, Mode 0 to either
Mono 8 or Raw 8 (see Section
3.10.2 and page 4-36 ). With either of these IDs set, the camera
outputs 8 bits per pixel.
When the Mono 8 color coding ID is set, the camera outputs 8 bits per pixel and outputs only the
Y component (brightness) of the YUV format.
When the Raw 8 color coding ID is set, the camera outputs 8 bits per pixel and outputs the raw
data for each pixel. (The pixel data is
not processed to account for the color filter.)
For 12 Bit Depth
Set the value of the Coding ID field of the Color Coding ID register for Format 7, Mode 0 to Raw
16. When the Raw 16 color coding ID is set, the camera outputs 16 bits per pixel and outputs the
raw data for each pixel. (The pixel data is
not processed to account for the color filter.) Although
the camera outputs 16 bits per pixel in this mode, only 12 bits are effective. The effective pixel
data fills from the LSB and the unused bits are filled with zeros. Pixel data is stored in the PC
memory in little endian format, i.e., the low byte for each pixel is stored at the lower address and
the high byte is stored at the neighboring higher address.
L
On an
A641
f
set to Mono 16 or an
A641
fc
set to Raw 16, the maximum frame rate is
8.15 fps at full resolution.