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  2. Pantograph - Wikipedia

    en.wikipedia.org/wiki/Pantograph

    Drafting pantograph in use Pantograph used for scaling a picture. The red shape is traced and enlarged. Pantograph 3d rendering. A pantograph (from Greek παντ- 'all, every' and γραφ- 'to write', from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical ...

  3. Camera lucida - Wikipedia

    en.wikipedia.org/wiki/Camera_lucida

    A camera lucida is an optical device used as a drawing aid by artists and microscopists. It projects an optical superimposition of the subject being viewed onto the surface upon which the artist is drawing. The artist sees both scene and drawing surface simultaneously, as in a photographic double exposure.

  4. Perspective machine - Wikipedia

    en.wikipedia.org/wiki/Perspective_machine

    A perspective machine is an optical instrument designed to help artists create perspective drawings. [1] The earliest machines were built centuries ago when the theory of perspective was being worked out, and modern versions are still [ 2 ] in use.

  5. Comparison gallery of image scaling algorithms - Wikipedia

    en.wikipedia.org/wiki/Comparison_gallery_of...

    Using machine learning, convincing details are generated as best guesses by learning common patterns from a training data set. The upscaled result is sometimes described as a hallucination because the information introduced may not correspond to the content of the source.

  6. Mimeograph - Wikipedia

    en.wikipedia.org/wiki/Mimeograph

    A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.

  7. Technical drawing tool - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing_tool

    The drawing head of a track-type drafting machine slides on bearings in a vertical rail, which in turn is moved along a horizontal, top-mounted rail. Both apparatus types have an adjustable drawing-head with rules attached to a protractor scale so that the angle of the rules may be adjusted. [6]: 35–36