the action that converting a raster dataset from a nonreal-world coordinate system(image space) to a real-world coordinate system is called georeferencing.
GEOREFERENCING
Meaning of GEOREFERENCING in English
Sean Woo's Finance, GIS and real estate English glossary. Английский глоссарий по ГИС(Географическая информационная система) и недвижимости Sean Woo's Finance. 2012