Temperature measuring based on image processing

With the developing of science and technology, temperature measuring in many industries is more important for getting high accuracy. Some traditional temperature measuring in high temperature locale is using thermocouple, these sensors must contact object, and so they are not used for long time. Object image acquired by using CCD (Charge Coupled Device) sensor can be analyses to calculate object temperature. At present, temperature measuring method-based image is a hot topic and many researchers have contribute into this aspect. Different to contacting-type measuring, approach based on image sensor can measure temperature and do not need to contact object surface. Colorimetry in literature is a good method using image information. Intensity measuring temperature approach is easy disturbed by surrounding illuminative. Colorimetry need to adjust many parameters, it is difficult. In this paper, a subtract-color method is proposed. Using this method we can model relation curve between color and temperature from experiments data. The method is robust to surrounding illuminative and it can banish brightness affection.