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  2. Correspondence problem - Wikipedia

    en.wikipedia.org/wiki/Correspondence_problem

    The images can be taken from a different point of view, at different times, or with objects in the scene in general motion relative to the camera(s). The correspondence problem can occur in a stereo situation when two images of the same scene are used, or can be generalised to the N-view correspondence problem.

  3. List of NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/List_of_NP-complete_problems

    Modularity maximization [5] Monochromatic triangle [3]: GT6 Pathwidth, [6] or, equivalently, interval thickness, and vertex separation number [7] Rank coloring; k-Chinese postman; Shortest total path length spanning tree [3]: ND3 Slope number two testing [8] Recognizing string graphs [9] Subgraph isomorphism problem [3]: GT48 Treewidth [6]

  4. Method of images - Wikipedia

    en.wikipedia.org/wiki/Method_of_images

    The method of images (or method of mirror images) is a mathematical tool for solving differential equations, in which boundary conditions are satisfied by combining a solution not restricted by the boundary conditions with its possibly weighted mirror image. Generally, original singularities are inside the domain of interest but the function is ...

  5. How to Solve It - Wikipedia

    en.wikipedia.org/wiki/How_to_Solve_It

    Solve an equation [14] Also suggested: Look for a pattern [15] Draw a picture [16] Solve a simpler problem [17] Use a model [18] Work backward [19] Use a formula [20] Be creative [21] Applying these rules to devise a plan takes your own skill and judgement. [22] Pólya lays a big emphasis on the teachers' behavior.

  6. Inverse problem - Wikipedia

    en.wikipedia.org/wiki/Inverse_problem

    To solve for the model parameters that fit our data, we might be able to invert the matrix to directly convert the measurements into our model parameters. For example: p = F − 1 d obs {\displaystyle p=F^{-1}d_{\text{obs}}} A system with five equations and five unknowns is a very specific situation: our example was designed to end up with this ...

  7. Astrometric solving - Wikipedia

    en.wikipedia.org/wiki/Astrometric_solving

    Astrometric solving or Plate solving or Astrometric calibration of an astronomical image is a technique used in astronomy and applied on celestial images. Solving an image is finding match between the imaged stars and a star catalogue. The solution is a math model describing the corresponding astronomical position of each image pixel. [1]

  8. Iterated function - Wikipedia

    en.wikipedia.org/wiki/Iterated_function

    Thus, if one can solve for one iterated function system, one also has solutions for all topologically conjugate systems. For example, the tent map is topologically conjugate to the logistic map. As a special case, taking f(x) = x + 1, one has the iteration of g(x) = h −1 (h(x) + 1) as g n (x) = h −1 (h(x) + n), for any function h.

  9. Visual cryptography - Wikipedia

    en.wikipedia.org/wiki/Visual_cryptography

    A demonstration of visual cryptography. When two same-sized images of apparently random black-and-white pixels are superimposed, the Wikipedia logo appears. In this example, the binary image has been split into two component images. Each component image has a pair of pixels for every pixel in the original image. These pixel pairs are shaded ...