Allied Vision Technologies MF-145B2 Instruction Manual download pdf (Page 52)

Description of the data path

MARLIN Technical Manual

Page 44

8.5 Setting the offset (black level)

It is possible to set the black value in the camera within the following ranges:

CCD-models: 0...+16 gray values (@ 8 bit). Increments are in 1/16 LSB (@ 8 bit).

CMOS-model: 0 … +127 (@ 8 bit)

The formula for gain and offset setting is: Y`= GxY+0

8.6 Lookup tables (LUT)

The camera provides one user-defined LUT. This is also used for the gamma correction. The

lookup table converts the 10 bits from the digitizer to 8 bits.

The use of a LUT allows you to store any function in the form Output = F(Input) in the RAM of

the camera and to use it on the individual pixels of the frame at run-time.

The values of functions are calculated within a specific range and the input value is used as an

index in the table.

The AVT Marlin can temporarily store 1 LUT in the camera. One example of such an LUT is the

Gamma LUT: Output = (Input)

0.45

128

256

384

512

640

768

896

1024

0 128 256 384 512 640 768 896

Figure 28: Gamma LUT

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 130 131

No comments

Allied Vision Technologies MF-145B2 Instruction Manual Page 52