  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.
