Instruction manual

Marlin Technical ManualV.2.7.0
81
Description of the data path
The following pictures illustrate the sequence of commands for generating the
shading image.
The correction sequence controlled via Directcontrol uses the average of 16
frames (10H) to calculate the correction frame.
The top picture shows the input image (with lens out of focus). The bottom pic-
ture shows the shading corrected output image (unfocused lens).
Note

Configuration
To configure this feature in an advanced register: See Table
107: Advanced register: Shading on page 207.
Note

• The maximum value of GRAB_COUNT depends on the type
of camera and the number of frame buffers that exist.
GRAB_COUNT is also automatically corrected to the
power of two.
• The SHDG_CTRL register should not be queried at very
short intervals. This is because each query delays the
generation of the shading image. An optimal interval
time is 500 ms.