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  2. Opaque projector - Wikipedia

    en.wikipedia.org/wiki/Opaque_projector

    The document camera is also called a desktop presenter unit or opaque projector. Opaque projectors are still in use for tracing, called tracing projectors. A flat or solid original is projected on a larger sheet of paper onto a wall or easel, where the artist or craftsperson can trace the outline reliably. [4] [5]

  3. Tracing (art) - Wikipedia

    en.wikipedia.org/wiki/Tracing_(art)

    Tracing is the act of copying an image or work of art by drawing over its lines, especially through the use of transparent overlays. [1] Tracing can provide a way for a person to develop their artistic skills for example when it comes to learning anatomy. It is however frowned upon in many art circles.

  4. Camera obscura - Wikipedia

    en.wikipedia.org/wiki/Camera_obscura

    While the use of the camera obscura has waxed and waned, one can still be built using a few simple items: a box, tracing paper, tape, foil, a box cutter, a pencil, and a blanket to keep out the light. [82] Homemade camera obscura are popular primary- and secondary-school science or art projects.

  5. Rotoscoping - Wikipedia

    en.wikipedia.org/wiki/Rotoscoping

    By tracing an object, the filmmaker creates a silhouette (called a matte) that can be used to extract that object from a scene for use on a different background. While blue- and green-screen techniques have made the process of layering subjects in scenes easier, rotoscoping still plays a large role in the production of visual effects imagery.

  6. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed. However some differences are necessitated by the much larger size of the transparencies used (generally the size of a printed page), and the requirement ...

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