Chapter 5
Configuration Utility
©
National Instruments Corporation
5-17
PCI/PXI-1408 and NI-IMAQ for Win95/NT
•
Log—When you select this option, the LUT converts the
sampled data to a logarithmic form that produces greater
contrast in the black region, as shown in Figure 5-13.
Figure 5-13. Log LUT
•
Exponential—When you select this option, the LUT converts
the sampled data to a logarithmic form that produces greater
contrast in the white region, as shown in Figure 5-14.
Figure 5-14. Exponential LUT
Log LUT
0
5 0
1 0 0
1 5 0
2 0 0
2 5 0
3 0 0
0
2 5
5 0
7 5
1 0 0 1 2 5 1 5 0 1 7 5 2 0 0 2 2 5 2 5 5
Stored Value
Sampled Data
( 2 5 5 )
Exponential LUT
0
5 0
1 0 0
1 5 0
2 0 0
2 5 0
3 0 0
0
2 5
5 0
7 5
1 0 0 1 2 5 1 5 0 1 7 5 2 0 0 2 2 5 2 5 5
Stored Value
Sampled Data
( 2 5 5 )