Are you sure that working on a gray scale representation of the thernographys looses information? Normally a thermocam has an 8-bit ADC, and allows to save pictures in 256 different gray levels or alternatively using a palette that provides 256 colors that are easier to distinguish visually. It also most certainly comes with software that losslessly converts images from one of these formats to the other. Ergo the correct workflow would be: Losslessly convert the pictures to gray scale, then stitch them and then convert them to the fancy colorful palette. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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