ALLIED Vision Technologies Stingray F-504 - Manual (Page 309)

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