Evaluation of colour space transformation suitability to optical temperature measurements

7th European Thermal-Sciences Conference

Ziemba, A.^1 ; Fornalik-Wajs, E.^1

AGH University of Science and Technology, Department of Fundamental Research in Energy Engineering, Al. Mickiewicza 30, Krakow

30-059, Poland^1

关键词: Colour spaces;    Computational time;    Digital particle image;    Image features;    Measured parameters;    Numerical operations;    Quantitative data;    Thermochromic liquid crystals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032108/pdf
DOI  :  10.1088/1742-6596/745/3/032108

来源: IOP

【 摘 要 】

All optical measurement methods base on the image analysis and relation between the measured parameter and some image features. In Digital Particle Image Thermometry (DPIT), such relation represents a function between the temperature and particles' colour (i.a. Thermochromic Liquid Crystals). For the quantitative data acquisition the "colour" information is necessary, therefore the colour spaces based on hue H are used. Due to the big number of numerical operations needed in the analysis, the choice of colour space transformation is significant due to the accuracy and computational time. In this paper commonly applied RGB to HSI colour spaces' transformations were compared and evaluation of their suitability to temperature measurement was performed. Time of obtaining the final results was considered as the main criterion. Appropriate calculations were conducted and presented.