Projiceringer

Projiceringer is the plural form of projicering, a term used in several fields to denote projection: the act of throwing, casting, or transforming an image, signal, or concept onto another medium or space, or the result produced by such an operation.

In optics and media, a projicering describes projecting an image or video onto a screen, typically with projectors or digital displays. It covers cinema, classrooms, and presentations, where light is emitted to form an enlarged image on a surface. Projection mapping is a related technique that aligns images with irregular or three‑dimensional surfaces for artistic or architectural effects.

In cartography, map projections are mathematical transformations that map the globe onto a plane. They introduce distortions in area, shape, distance, or direction. Projections are categorized by which properties they preserve, such as conformal, equal‑area, or equidistant projections. Common examples include Mercator, Peters, and Lambert conformal conic, each serving different navigational or thematic purposes.

In mathematics, projection is a linear operation P on a vector space with P^2 = P. Orthogonal projection minimizes distance to a subspace, and many vector spaces can be decomposed into a direct sum of a subspace and its projection, providing a useful tool in analysis and geometry.

In psychology, projection is a defense mechanism where a person attributes their own unacceptable thoughts or feelings to others. While Danish usage typically uses projektion for this idea, projicering can appear in some texts as a variant.