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  2. Matrix difference equation - Wikipedia

    en.wikipedia.org/wiki/Matrix_difference_equation

    The first-order matrix difference equation [x t − x*] = A[x t−1 − x*] is stable—that is, x t converges asymptotically to the steady state x* —if and only if all eigenvalues of the transition matrix A (whether real or complex) have an absolute value which is less than 1.

  3. Symplectic integrator - Wikipedia

    en.wikipedia.org/wiki/Symplectic_integrator

    The symplectic Euler method is the first-order integrator with = and coefficients = = Note that the algorithm above does not work if time-reversibility is needed. The algorithm has to be implemented in two parts, one for positive time steps, one for negative time steps.

  4. Color moments - Wikipedia

    en.wikipedia.org/wiki/Color_moments

    Computing the features - Use the color moments formulae in order to compute the first three moments for each of the color channels in the image. For example, if the HSV color space is used, this means that for each of the images, 9 features in total will be computed (the first three order moments for the Hue, Saturation, and Value channels).

  5. Model order reduction - Wikipedia

    en.wikipedia.org/wiki/Model_order_reduction

    MORLAB: Model Order Reduction Laboratory. This toolbox is a collection of MATLAB/OCTAVE routines for model order reduction of linear dynamical systems based on the solution of matrix equations. The implementation is based on spectral projection methods, e.g., methods based on the matrix sign function and the matrix disk function.

  6. State-space representation - Wikipedia

    en.wikipedia.org/wiki/State-space_representation

    The internal state variables are the smallest possible subset of system variables that can represent the entire state of the system at any given time. [13] The minimum number of state variables required to represent a given system, , is usually equal to the order of the system's defining differential equation, but not necessarily.

  7. LMS color space - Wikipedia

    en.wikipedia.org/wiki/LMS_color_space

    The LMS color space can be used to emulate the way color-blind people see color. An early emulation of dichromats were produced by Brettel et al. 1997 and was rated favorably by actual patients. An early emulation of dichromats were produced by Brettel et al. 1997 and was rated favorably by actual patients.

  8. Matrix differential equation - Wikipedia

    en.wikipedia.org/wiki/Matrix_differential_equation

    To solve a matrix ODE according to the three steps detailed above, using simple matrices in the process, let us find, say, a function x and a function y both in terms of the single independent variable t, in the following homogeneous linear differential equation of the first order,

  9. Color quantization - Wikipedia

    en.wikipedia.org/wiki/Color_quantization

    In computer graphics, color quantization or color image quantization is quantization applied to color spaces; it is a process that reduces the number of distinct colors used in an image, usually with the intention that the new image should be as visually similar as possible to the original image.