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  2. Scaling (geometry) - Wikipedia

    en.wikipedia.org/wiki/Scaling_(geometry)

    When the scale factor is larger than 1, (uniform or non-uniform) scaling is sometimes also called dilation or enlargement. When the scale factor is a positive number smaller than 1, scaling is sometimes also called contraction or reduction. In the most general sense, a scaling includes the case in which the directions of scaling are not ...

  3. Continuous wavelet transform - Wikipedia

    en.wikipedia.org/wiki/Continuous_wavelet_transform

    Continuous wavelet transform of frequency breakdown signal. Used symlet with 5 vanishing moments.. In mathematics, the continuous wavelet transform (CWT) is a formal (i.e., non-numerical) tool that provides an overcomplete representation of a signal by letting the translation and scale parameter of the wavelets vary continuously.

  4. Scale invariance - Wikipedia

    en.wikipedia.org/wiki/Scale_invariance

    In physics, mathematics and statistics, scale invariance is a feature of objects or laws that do not change if scales of length, energy, or other variables, are multiplied by a common factor, and thus represent a universality. The technical term for this transformation is a dilatation (also known as dilation).

  5. Dilation - Wikipedia

    en.wikipedia.org/wiki/Dilation

    Dilation (operator theory), a dilation of an operator on a Hilbert space; Dilation (morphology), an operation in mathematical morphology; Scaling (geometry), including: Homogeneous dilation , the scalar multiplication operator on a vector space or affine space; Inhomogeneous dilation, where scale factors may differ in different directions

  6. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.

  7. Homothety - Wikipedia

    en.wikipedia.org/wiki/Homothety

    The composition of two homotheties with centers S 1, S 2 and ratios k 1, k 2 = 0.3 mapping P i &rarrow; Q i &rarrow; R i is a homothety again with its center S 3 on line S 1 S 2 with ratio k ⋅ l = 0.6. The composition of two homotheties with the same center is again a homothety with center .

  8. Bishop score - Wikipedia

    en.wikipedia.org/wiki/Bishop_score

    12 cm 3–4 cm 5+cm Dilation is a measure of how open the cervical os is. It is usually the most important indicator of progression through the first stage of labour. Dilation is measured by way of a digital cervical exam with the care providers fingers. Dilation is described using centimetres; closed, 1cm, 2cm, 3cm, etc until fully dilated ...

  9. Dilation (morphology) - Wikipedia

    en.wikipedia.org/wiki/Dilation_(morphology)

    (Suppose x = (px, qx), z = (pz, qz), then x − z = (px − pz, qx − qz).) In the bounded, discrete case ( E is a grid and B is bounded), the supremum operator can be replaced by the maximum . Thus, dilation is a particular case of order statistics filters, returning the maximum value within a moving window (the symmetric of the structuring ...

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