On Fri, 25 Jun 2021 at 15:52, Álvaro Huertas wrote: > > I'm trying to stitch thermal images (codified with Rainbow HC palette for > false color) and once I've stitched the images bring back the thermal > information of the images. > > The problem is that once I stitch the images Hugin slightly change the values > of some pixels then I can't bring back the thermal information. Anyone knows > how to keep the values of the original image pixels unchangeable?
There are three things you need to do: 1. Disable any photometric optimisation. Set all the photometric parameters of all your input photos to zero, and the EV of the output panorama to zero. This will prevent Hugin from trying to 'fix' the exposure for you. 2. Disable blending between photos. In the Stitcher tab, set a blender command-line option of '-l 0', or just use the 'built-in' blender option with 'hard-seam' set. This will prevent mixing of colours from adjacent photos. You will now see a hard-edge between photos in the stitched output. 3. Disable interpolated sampling. In the stitcher tab, remapper options, set the interpolator to 'Nearest neighbour'. Hugin is usually averaging several adjacent input pixel values to generate an output pixel, you don't want this 'anti-aliasing' behavior. The results will not look as smooth, and arguably you are losing data with 'Nearest Neighbour', but each output pixel will get its value from a single input pixel. Let us know how you get on. When I was (briefly) surveying solar arrays the drone was using a multi-spectral imaging camera, is your data converted to RGB? Changing the Hugin stack to work with more than three channels would be _very_ difficult. -- Bruno -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/CAJV99ZhyxQ1NOT3rx0KE7WVGwczLBF-gUOiARSbOEjOL7OFijQ%40mail.gmail.com.
