BOBCAT HD-SDI
Hardware User’s Manual
Imperx, Inc.
Rev. 1.4
6421 Congress Ave.
6/2/2014
Boca Raton, FL 33487
+1 (561) 989-0006
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reached. The selection to use static or dynamic balancing depends on the
application. Please note, that if AGC is enabled, it is strongly recommended to
use static balancing, because the dynamic balancing can interfere with the
AGC algorithm.
2.13.
TRANSFER FUNCTION CORRECTION – LUT
The LUT (Lookup Table) feature allows the user to modify and transform the original
video data into any arbitrary value – Figure 2.13. Any 10-bit value can be transformed
into any other 10-bit value. The camera supports 8 Gamm Lookup tables, 4 user
Lookup tables ( one component for mono cameras, 3 components for color cameras -
RGB), each consisting of 1023 entries
for each component, with each entry being 10
bits wide. The LUT is applied to the entire image unless AOI7 is enabled as “LUT
ROI”. In this case the LUT function will apply only to the selected ROI. The user can
generate and upload his own custom LUT using the BOBCAT Configuration software
– refer to Appendix B.
Figure 2.13 – LUT data path.
2.13.1.
Standard Gamma Correction
The image generated by the camera is normally viewed on a CRT (or LCD)
display, which does not have a linear transfer function – i.e., the display
brightness is not linearly proportional to the scene brightness (as captured by
the camera). As the object brightness is lowered, the brightness of the display
correspondingly lowers. At a certain brightness level, the scene brightness
decrease does not lead to a corresponding display brightness decrease. The