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  2. Tracing (art) - Wikipedia

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

    A man using a light table to trace an image. 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.

  3. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.

  4. Trace (linear algebra) - Wikipedia

    en.wikipedia.org/wiki/Trace_(linear_algebra)

    When both A and B are n × n matrices, the trace of the (ring-theoretic) commutator of A and B vanishes: tr([A, B]) = 0, because tr(AB) = tr(BA) and tr is linear. One can state this as "the trace is a map of Lie algebras gl n → k from operators to scalars", as the commutator of scalars is trivial (it is an Abelian Lie algebra ).

  5. Image tracing - Wikipedia

    en.wikipedia.org/wiki/Image_tracing

    Adobe Illustrator has a facility to trace individual curves. [3] Automated programs can have mixed results. A program (PowerTRACE) was used to convert a PNG map to SVG. The program did a good job on the map boundaries (the most tedious task in the tracing) and the settings dropped out all the text (small objects). The text was manually re-inserted.

  6. Ray tracing (graphics) - Wikipedia

    en.wikipedia.org/wiki/Ray_tracing_(graphics)

    This recursive ray tracing of reflective colored spheres on a white surface demonstrates the effects of shallow depth of field, "area" light sources, and diffuse interreflection. (c. 2008) In 3D computer graphics, ray tracing is a technique for modeling light transport for use in a wide variety of rendering algorithms for generating digital images.

  7. CorelDRAW - Wikipedia

    en.wikipedia.org/wiki/CorelDRAW

    CorelDRAW is a vector graphics editor developed and marketed by Alludo (formerly Corel Corporation). It is also the name of the Corel graphics suite, which includes the bitmap-image editor Corel Photo-Paint as well as other graphics-related programs (see below).

  8. Trace class - Wikipedia

    en.wikipedia.org/wiki/Trace_class

    In mathematics, specifically functional analysis, a trace-class operator is a linear operator for which a trace may be defined, such that the trace is a finite number independent of the choice of basis used to compute the trace. This trace of trace-class operators generalizes the trace of matrices studied in linear algebra.

  9. Animation - Wikipedia

    en.wikipedia.org/wiki/Animation

    Rotoscoping is a technique patented by Max Fleischer in 1917 where animators trace live-action movement, frame by frame. [78] The source film can be directly copied from actors' outlines into animated drawings, [ 79 ] as in The Lord of the Rings (US, 1978), or used in a stylized and expressive manner, as in Waking Life (US, 2001) and A Scanner ...

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