On the visualization of tetrachromatic images
Alfredo Restrepo, Edisson Maldonado · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2015
How can a normal trichromat person attempt to see a tetrachromatic image? We propose 2 techniques, both of which use the time dimension. This makes it difficult to use the techniques to visualise tetrachromatic videos so, we deal here only with the visualisation of tetrachromatic (static) images. In one of the visualisation techniques we use "movies" (as in a Matlab movie) made of frames that are trichromatic renderings of tetrachromatically-processed versions of the tetrachromatic image to be visualised, where a parameter in 4-Runge1 space varies across the versions. In the other technique, we give a "dynamic texture" to regions of pixels having a UV or, alternatively an IR component. The texture can be for example a superposed "granularity" (texture) that "vibrates" in time, where the density of the grains depends on the amount of UV (or NIR) present in the tetrachromatic colour.