A liquid crystal thermography calibration with true color image processing  

作　　者：饶宇 臧述升 黄名海 

机构地区：[1]Institute of Turbomachinery,School of Mechanical and Power Engineering,Shanghai Jiao Tong University

出　　处：《Chinese Optics Letters》2009年第9期795-797,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.50806045.

摘　　要：Liquid crystal thermography is a high-resolution, non-intrusive optical technique for full-field temperature measurement. We present the detailed calibration data for the thermochromic liquid crystal （TLC） with a useful range of 41-60 ℃. The calibration is done with true color image processing by using an isothermal calibrator. The hue-temperature curve of the TLC is obtained, and the measurement uncertainty is analyzed. Combined with the image noise reduction technique of a 5×5 median filter, the measurement accuracy of the liquid crystal thermography can be significantly improved by approximately 57.1%.Liquid crystal thermography is a high-resolution, non-intrusive optical technique for full-field temperature measurement. We present the detailed calibration data for the thermochromic liquid crystal （TLC） with a useful range of 41-60 ℃. The calibration is done with true color image processing by using an isothermal calibrator. The hue-temperature curve of the TLC is obtained, and the measurement uncertainty is analyzed. Combined with the image noise reduction technique of a 5×5 median filter, the measurement accuracy of the liquid crystal thermography can be significantly improved by approximately 57.1%.

关 键 词：CALIBRATION Dendrites (metallography) Imaging systems Liquid crystals Optical data processing Remote sensing Thermography (imaging) Thermography (temperature measurement) Uncertainty analysis 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O753.2[自动化与计算机技术—计算机科学与技术]