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2. Generalised Hough transform - Wikipedia

   en.wikipedia.org/wiki/Generalised_Hough_transform

   (0) Convert the sample shape image into an edge image using any edge detecting algorithm like Canny edge detector (1) Pick a reference point (e.g., (x c, y c)) (2) Draw a line from the reference point to the boundary (3) Compute ɸ (4) Store the reference point (x c, y c) as a function of ɸ in R(ɸ) table. Detection:

3. Template:Infobox artwork - Wikipedia

   en.wikipedia.org/wiki/Template:Infobox_artwork

   An infobox for artwork Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status Title title The title of the artwork. Defaults to the page name. String optional Image file image image_file The name of the image file to display, without the "File:" prefix File optional Image size image_size The size of the image in pixels ...

4. Template:Infobox ancient site - Wikipedia

   en.wikipedia.org/wiki/Template:Infobox_ancient_site

   mapframe-wikidata – Set to yes to show shape/line features from the wikidata item, if any, when |coord= is set. Default: not specified; Customise which features are displayed: mapframe-shape – Turn off display of shape feature by setting to none. Use an inverse shape (geomask) instead of a regular shape by setting to inverse. Default: not ...

5. Template:Infobox river - Wikipedia

   en.wikipedia.org/wiki/Template:Infobox_River

   Template: optional: Mapframe shapes from Wikidata: mapframe-wikidata: et to yes to show shape/line features from the wikidata item, if any, when coordinates are specified by parameter. Example yes: String: optional: Mapframe shape feature: mapframe-shape: Override display of mapframe shape feature. Turn off by setting to "none".

6. Template matching - Wikipedia

   en.wikipedia.org/wiki/Template_matching

   Template matching [1] is a technique in digital image processing for finding small parts of an image which match a template image. It can be used for quality control in manufacturing, [ 2 ] navigation of mobile robots , [ 3 ] or edge detection in images.

7. Vector graphics - Wikipedia

   en.wikipedia.org/wiki/Vector_graphics

   For example, a square can be unambiguously defined by the locations of three of its four corners, from which the software can interpolate the connecting boundary lines and the interior space. Because it is a regular shape, a square could also be defined by the location of one corner, a size (width=height), and a rotation angle.