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  2. Transparency (graphic) - Wikipedia

    en.wikipedia.org/wiki/Transparency_(graphic)

    GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats.The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.

  3. Image (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Image_(mathematics)

    In mathematics, for a function :, the image of an input value is the single output value produced by when passed .The preimage of an output value is the set of input values that produce .

  4. Clip art - Wikipedia

    en.wikipedia.org/wiki/Clip_art

    Examples of computer clip art, from Openclipart. Clip art (also clipart, clip-art) is a type of graphic art. Pieces are pre-made images used to illustrate any medium. Today, clip art is used extensively and comes in many forms, both electronic and printed. However, most clip art today is created, distributed, and used in a digital form.

  5. Alpha compositing - Wikipedia

    en.wikipedia.org/wiki/Alpha_compositing

    A color spectrum image with an alpha channel that falls off to zero at its base, where it is blended with the background color.. In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1]

  6. Algebraic reconstruction technique - Wikipedia

    en.wikipedia.org/wiki/Algebraic_reconstruction...

    Gordon, Bender and Herman first showed its use in image reconstruction; [1] whereas the method is known as Kaczmarz method in numerical linear algebra. [ 2 ] [ 3 ] An advantage of ART over other reconstruction methods (such as filtered backprojection ) is that it is relatively easy to incorporate prior knowledge into the reconstruction process.

  7. Hypercomplex number - Wikipedia

    en.wikipedia.org/wiki/Hypercomplex_number

    q+1,p of the algebra Cl q+1,p (), which can be used to parametrise rotations in the larger algebra. There is thus a close connection between complex numbers and rotations in two-dimensional space; between quaternions and rotations in three-dimensional space; between split-complex numbers and (hyperbolic) rotations ( Lorentz transformations ) in ...

  8. Gallery of curves - Wikipedia

    en.wikipedia.org/wiki/Gallery_of_curves

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  9. Idempotence - Wikipedia

    en.wikipedia.org/wiki/Idempotence

    The concept of idempotence arises in a number of places in abstract algebra (in particular, in the theory of projectors and closure operators) and functional programming (in which it is connected to the property of referential transparency).