A blackbody is a conceptual solid mass that absorbs all electromagnetic radiation incident upon it, at all angles and all wavelengths.
Digital imaging histograms (not to be confused with RGB Parades) are a census of pixels whose channel or composite values occupy certain “bins” or discrete values along the x-axis, or abcissa.
A common strategy for dealing with editing, rendering, and encoding output is to establish a “proxy” workflow; using less demanding “proxies” rather then original “resource hog” originals.
Photoshop is a shockingly “deep” application with latent but powerful features for generating selections.
Science is of peculiar value in jurisprudence but there is no particularly elegant fitment between the two philosophies.