Table ofContents
FLIR Camera Adjustments...........................................................................................................................1
LWIR Video Camera....................................................................................................................................1
Application Note...........................................................................................................................................1
Document Number: 102-PS242-100-01 .......................................................................................................1
1.0 Document..........................................................................................................................................4
1.1 Revision History ...........................................................................................................................4
1.2 Scope.............................................................................................................................................4
2.0 Automatic AGC Parameters..............................................................................................................5
2.1 Introduction to Histograms ...........................................................................................................6
2.2 Linear Histogram..........................................................................................................................7
2.3 Plateau Histogram Equalization....................................................................................................8
2.4 Information-based and Information-based equalization .............................................................20
2.5 Legacy AGC modes....................................................................................................................21
2.5 Digital Data Enhancement (DDE) ..............................................................................................22
3.0 LUT Palettes and Polarity...............................................................................................................24
4.0 FFC Warning Indicator...................................................................................................................27
Table ofFigures
Figure 1: 14-bit Histogram............................................................................................................................6
Figure 2: Image of scene...............................................................................................................................7
Figure 3: Linear AGC, ITT Mean: 127, Max Gain: 8...................................................................................7
Figure 4: Illustration of the Linear-Histogram Mapping Function.............................................................8
Figure 5: Plateau: 150, ITT Mean: 127, Max Gain: 8...................................................................................9
Figure 6: Image Transform Table for Linear and Plateau algorithms.........................................................10
Figure 7: Plateau: 250, ITT: 110, Max Gain: 8...........................................................................................11
Figure 8: Plateau: 250, ITT: 150, Max Gain: 8...........................................................................................11
Figure 9: Low contrast scene in 14-bit space..............................................................................................12
Figure 10: Plateau: 250, ITT: 127, Max Gain: 8.........................................................................................12
Figure 11: Low contrast Scene: default settings.........................................................................................12
Figure 12: Plateau: 250, ITT: 127, Max Gain: 25.......................................................................................13
Figure 13: Low contrast scene: high gain...................................................................................................13
Figure 14: Plateau: 250, ITT: 127, Max Gain: 50.......................................................................................13
Figure 15: Low Contrast Scene: very high gain .........................................................................................13
Figure 16: Illustration of Plateau Value....................................................................................................14
Figure 17: Illustration of Maximum Gain in a Bland Image ....................................................................15
Figure 18: Illustration of ITT Midpoint....................................................................................................16
