ALLIED Vision Technologies Stingray F-504 - Manual (Page 137)

Description of the data path
STINGRAY Technical Manual V4.4.4
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dient is related to the fact that the source image is lower than 50% on
the right hand side.
• The histogram shows a peak with very few different gray values.
Loading a shading image out of the camera
GPDATA_BUFFER is used to load a shading image out of the camera. Because
the size of a shading image is larger than GPDATA_BUFFER, input must be
handled in several steps:
Figure 61: Uploading shading image to host
Query limits from
register:
SHDG_INFO and
GPDATA_INFO
Set EnableMemRD
to true (1)
Set AddrOffset to 0
Read n databytes
of
GPDATA_BUFFER
Increase
AddrOffset by n
bytes
Check
EnableMemRD for
no change
Repeat steps until
all data is read
Set EnableMemRD
to false (0)