問83
頻出度★☆☆
建物や物体などの立体物に, コンピュータグラフィックスを用いた映像などを投影し, 様々な視覚効果を出す技術を何と呼ぶか。
令和2年度 ITパスポート試験 問83
テクノロジ系情報メディア › マルチメディア応用
This question's explanation and your answers so far.
解説
問 83
Incorrectア
Digital signage refers to a system that uses electronic display devices such as displays and monitors to show advertisements or guidance information in places like storefronts, stations, and public spaces. It displays information on a flat screen and is not a technology that projects CG images onto three-dimensional objects.
Incorrectイ
Virtual reality (VR) is a technology that lets users experience a computer-generated virtual space as if it were real, through devices such as dedicated goggles. It immerses the user in a virtual space and is not a technology that projects images onto real three-dimensional objects to produce visual effects.
- ウ
正解 The correct answer is ウ, projection mapping. Projection mapping is a technology that uses a projector to cast computer graphics (CG) images, produced to match the shape of a three-dimensional object such as a building, object, or terrain, onto the surface of that object, creating visual effects that make the target appear to move or deform. Its distinctive feature is that the image is accurately overlaid (mapped) onto the uneven surface of the target, and it is widely used in event productions, advertising, and artistic expression. This exactly matches the question's description of projecting CG images onto a three-dimensional object to produce various visual effects.
Incorrectエ
A polygon refers to a many-sided shape such as a triangle or quadrilateral (the smallest unit of a surface) used to represent the surface of a solid in three-dimensional CG. It is the name of an element that makes up CG, not the technology of projecting images onto three-dimensional objects itself.
ここがポイント
- Projection mapping = a technology that projects CG images to match the shape of a three-dimensional object, producing visual effects.
- Distinguish it from confusingly similar image and CG-related terms (digital signage = electronic billboard, VR = immersive experience in a virtual space, polygon = smallest unit of a surface in 3DCG).
用語