A Novel Registration & Colorization Technique for Thermal to Cross Domain Colorized Images

Thermal images can be obtained as either grayscale images or pseudo colored images based on the thermal profile of the object being captured. We present a novel registration method that works on images captured via multiple thermal imagers irrespective of make and internal resolution as well as a colorization scheme that can be used to obtain a colorized thermal image which is similar to an optical image, while retaining the information of the thermal profile as a part of the output, thus providing information of both domains jointly. We call this a cross domain colorized image. We also outline a new public thermal-optical paired database that we are presenting as a part of this paper, containing unique data points obtained via multiple thermal imagers. Finally, we compare the results with prior literature, show how our results are different and discuss on some future work that can be explored further in this domain as well.