Imaging refers to the science of obtaining pictures or more complicated spatial representations, such as animations or 3-D models, from physical things.

The science of photography is not quite a subset of imaging, because it includes attempts to construct images which have little relation to the physical (such as double exposures, lens effects, etc).

Imaging also includes activities such as:

[this entry required a lot of philosophising; the word is used in a rather strong sense but tends not to be defined. Please correct any deontological errors I may have made]