THERMAL CAMERA PARAMETERS
Generally, thermal cameras applied to video surveillance are optimized for outdoor use, so they can be considered as a ready-to-use product.
Often, however, due to the different environmental conditions, the complexity of the scene or the type of environment where they are installed, they need to be properly configured, so that their use is 100% effective.
It is therefore worth investigating which are the most significant parameters, such as those that are very often modified during the setup phase, as they can significantly improve the quality of detection and measurement.
DYNAMIC-RANGE CONTROL
Two gain states are available:
- high-gain: This setting is designed to maximise contrast and is particularly indicated for applications that execute video analysis of images.
- low-gain: This setting increases the dynamic range of the image and decreases contrast. It is indicated for scenes with very hot elements, because the measurable temperature range increases.
| High gain | Low gain |
Flat-Field Correction: is a process whereby the thermal camera is recalibrated by briefly exposing its sensor to a uniform thermal scene in order to produce optimal image quality. FFC frequency can be configured or activated by a command.
ISOTHERM
Using the configuration parameters, it is possible to enable a special colour for objects included within a certain temperature range set.
Isotherm: example at 10°C with isotherm set to 11°C (lower threshold), 12°C (middle threshold), 13°C (upper threshold)
MAX GAIN
Modifying this parameter, you can enhance the displayed contrast, and also make image noise more obvious; with a low value, the image results more pleasing to the eye in that they appear less grainy. The optimal value of this parameter varies with application and personal preference
| Low value | High value |
DIGITAL DETAIL ENHANCEMENT (DDE)
Decreasing or increasing the value softens or accentuates image details.
| Low value | High value |
ADAPTIVE CONTRAST ENHANCEMENT (ACE)
The ACE adapts the contrast based on the temperature of the scene. Thresholds over 0 give higher contrast to hot scenes and less contrast to cold scenes; thresholds under 0 give higher contrast to cold scenes and less contrast to hot scenes.
| Value: -8 | Value: 0 | Value: +8 |
COLOUR PALETTE
Sets the colour type of the image displayed by the thermal camera
Authors:
Marco Saccardo & Matteo Torresani - Videotec Customer Technical Support
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