![Wärmebildsignatur eines Fussabdrucks. Thermal image signature of a footprint](/en/projects-and-products/signature-assessment/jcr:content/contentPar/sectioncomponent/sectionParsys/textwithinlinedimage/imageComponent1/image.img.jpg/1607351022557/Footprint.jpg)
![Wärmebildsignatur einer Herdplatte Thermal image signature of a hotplate](/en/projects-and-products/signature-assessment/jcr:content/contentPar/sectioncomponent/sectionParsys/textwithinlinedimage/imageComponent2/image.img.jpg/1607351022557/Herdplatten.jpg)
![Wärmebildsignatur einer Hand. Thermal image signature of a hand](/en/projects-and-products/signature-assessment/jcr:content/contentPar/sectioncomponent/sectionParsys/textwithinlinedimage/imageComponent3/image.img.jpg/1607351022557/Warme-Hand.jpg)
Assessment of camouflage materials and analysis of construction material for thermographical inspections, verification and validation of thermal simulations.
The rendition of an object in a thermal image (signature) is decisively influenced by its environment. In order to make a statement about the visibility of an object in a certain environment, it is therefore necessary to determine the influence of decisive environmental factors on the thermal appearance.
Procedure
A method for characterizing distinctive features of textiles worn on a thermal image has been realized.
For this purpose, a textile is placed on a heating plate with a temperature control in the environmental simulation laboratory. The temperature is set to 34 °C, which corresponds to the skin temperature of the human body. Afterwards, a sequence of thermal images is recorded at different wind speeds for 5 min at a defined air temperature in four different environmental scenarios with an image frequency of 1 Hz under the following conditions:
- Without any radiation sources
- Artificial sun as source of radiation
- Artificial sun and cold sky as source of radiation
- Cold sky as source of radiation