User guide

Configuration of the camera
STINGRAY Technical Manual V4.4.4
307
Shading correction
Owing to technical circumstances, the interaction of recorded objects with
one another, optical effects and lighting non-homogeneities may occur in
the images.
Because these effects are normally not desired, they should be eliminated as
far as possible in subsequent image editing. The camera has automatic shad-
ing correction to do this.
Provided that a shading image is present in the camera, the on/off bit can
be used to enable shading correction.
The on/off and ShowImage bits must be set for saved shading images to be
displayed.
Note

• Always make sure that the shading image is saved at
the highest resolution of the camera. If a lower resolu-
tion is chosen and ShowImage is set to true, the image
will not be displayed correctly.
• The shading image is computed using the current video
settings. On fixed video modes the selected frame rate
also affects the computation time.
Register Name Field Bit Description
0xF1000250 SHDG_CTRL Presence_Inq [0] Indicates presence of this
feature (read only)
BuildError [1] Could not built shading
image
--- [2..3] Reserved
ShowImage [4] Show shading data as image
BuildImage [5] Build a new shading image
ON_OFF [6] Shading on/off
Busy [7] Build in progress
--- [8..15] Reserved
MemChannelError [16..19] Indicates memory channel
error. See Table 139: Memory
channel error description on
page 309.
MemoryChannel [20..23] Set memory channel number
for save and load operations
GrabCount [24..31] Number of images
Table 138: Advanced register: Shading