1. A method comprising: obtaining a first image of an anatomical object corresponding to a first radiation energy, wherein the anatomical object comprises one or more tissues; obtaining at least one second image of the anatomical object corresponding to at least one second radiation energy, wherein the at least one second radiation energy is distinct from the first radiation energy; determining joint attenuation characteristics of each tissue at the first radiation energy and the at least one second radiation energy; designing a spectral filter for at least one desired tissue from the one or more tissues based at least in part on the joint attenuation characteristics and a mixing proportion of a plurality of constituents of the at least one desired tissue; and selectively filtering using the spectral filter, attenuation values due to the at least one desired tissue from a reference image to generate an enhanced image, wherein the reference image is one of the first image or the at least one second image.