illustrative image; artist's impression; concept picture
Used for a picture or graphic that explains or demonstrates something, such as a mockup, diagram, or artist's rendering. Not a general term for any image.
An artist's impression of the new product was released.
This illustrative image is a projected completion drawing.
digital image; image file
Computing term for a digital image, such as a photo or graphic file. Often used in technical contexts.
Please save the digital image in JPEG format.
Compound of イメージ (image) and 画像 (picture, image). The exact derivation is straightforward; the word is a modern coinage combining two common terms.