Avtor/Urednik		Varenne, Marielle; Batsale, Jean-Christophe
Naslov		Infrared images processing and volume averaging method in order to estimate 1D or 2D thermal conductivity fields
Tip		članek
Vir		Image Anal Stereol
Vol. in št.		Letnik 20, št. Suppl 1
Leto izdaje		2001
Obseg		str. 299-305
Jezik		eng
Abstrakt		Homogenization methods such volume averaging methods are generally used in order to justify macroscopic parameters such as effective thermal conductivity related to heat transfer in porous media. The decomposition of a temperature field (obtained by infrared thermography) in a macroscopic field and a local deviation field allows here to implement an image processing method in order to estimate a local thermophysical properties field. The image analysis consists then in a space filtering (moving average) of each image at each time step. Such filtered images constitute the components of a sensitivity matrix of a linear least square estimation method. The method is tested with experimental transient temperature fields, obtained with a calibrated 1D and 2D heterogeneous samples with an infrared camera.
Deskriptorji		MATERIALS TESTING THERMAL CONDUCTIVITY THERMOGRAPHY IMAGE PROCESSING, COMPUTER-ASSISTED INFRARED RAYS