User-Defined Look-Up Table; Region Lut And Lut Enable - Photon Focus MV0 CMOSIS Series User Manual

11 Image Data Processing
11.4.3 User-defined Look-up Table
In the 'User' mode, the mapping of input to output grey levels can be configured arbitrarily by
the user. This procedure is explained in Section C.4.
Figure 11.6: Data path through LUT

11.4.4 Region LUT and LUT Enable

Two LUTs and a Region-LUT feature are available in the camera. Both LUTs can be enabled
independently (see Table 11.1). LUT 0 superseeds LUT1.
Enable LUT 0 Enable LUT 1
-
X don't care
-
X
X
Table 11.1: LUT Enable and Region LUT
When Region-LUT feature is enabled, then the LUTs are only active in a user defined region.
Examples are shown in Fig. 11.7 and Fig. 11.8.
Fig. 11.7 shows an example of overlapping Region-LUTs. LUT 0, LUT 1 and Region LUT are
enabled. LUT 0 is active in region 0 ((x00, x01), (y00, y01)) and it supersedes LUT 1 in the
overlapping region. LUT 1 is active in region 1 ((x10, x11), (y10, y11)).
Fig. 11.8 shows an example of keyhole inspection in a laser welding application. LUT 0 and LUT
1 are used to enhance the contrast by applying optimized transfer curves to the individual
regions. LUT 0 is used for keyhole inspection. LUT 1 is optimized for seam finding.
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1 2 b i t
Enable Region LUT
- -
-
X -
- X
X X
7 s e r L U T
y = f ( x )
8 b i t
Description
LUT are disabled.
LUT 0 is active on whole image.
LUT 1 is active on whole image.
LUT 0 active in Region 0.
LUT 0 active in Region 0 and LUT 1 active
in Region 1. LUT 0 supersedes LUT1.
MAN078 12/2018 V1.1