IPA IP 2020 Question 83
A question IPA Japan published in 令和2年度 10月 ITパスポート試験 公開問題 問83, translated into English. ITPEC is based on the same exams.
Same question on ITPEC: Apr 2025 Q24
Which of the following is a technology that projects things such as video made with computer graphics on to buildings, objects, and other such three-dimensional things, and produces a variety of visual effects?
Explanation
Projection mapping — projecting computer-generated video onto a building or object, fitted to its shape.
The surface of the building or object is measured, and the video is prepared to match its edges, windows and contours. Projected onto it, the image lines up with the real shape, so the wall seems to move, crumble, change colour or open. It is used for events, advertising and stage performances.
Answer (c)
Why not others:
- •(a) Digital signage — electronic displays in stations, shops and streets that show advertising or information; the image stays on a screen
- •(b) Virtual reality — immerses the user in a computer-generated world, usually through a head-mounted display, instead of adding images to real objects
- •(d) Polygon — the flat shape (usually a triangle) that CG uses to build the surfaces of 3D models; a building block, not a projection technique
Key rule: VR replaces what the user sees with a virtual world, AR overlays virtual images on a view of the real world through a device, and projection mapping puts the images on the real object itself.
Multimedia · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.