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2. Circle Hough Transform - Wikipedia

   en.wikipedia.org/wiki/Circle_Hough_Transform

   The circle Hough Transform (CHT) is a basic feature extraction technique used in digital image processing for detecting circles in imperfect images. The circle candidates are produced by “voting” in the Hough parameter space and then selecting local maxima in an accumulator matrix. It is a specialization of the Hough transform.

3. List of common coordinate transformations - Wikipedia

   en.wikipedia.org/wiki/List_of_common_coordinate...

   Note: solving for ′ returns the resultant angle in the first quadrant (< <). To find , one must refer to the original Cartesian coordinate, determine the quadrant in which lies (for example, (3,−3) [Cartesian] lies in QIV), then use the following to solve for :

4. Image circle - Wikipedia

   en.wikipedia.org/wiki/Image_circle

   The image circle is the cross section of the cone of light transmitted by a lens or series of lenses onto the image plane. When this light strikes a perpendicular target such as photographic film or a digital camera sensor, it forms a circle of light – the image circle. Various sensor aspect ratios may be used which all fit inside the same ...

5. Inversive geometry - Wikipedia

   en.wikipedia.org/wiki/Inversive_geometry

   Circles G to J, which do not, map to other circles. The reference circle and line L map to themselves. Circles intersect their inverses, if any, on the reference circle. In the SVG file, click or hover over a circle to highlight it. Inversion of a line is a circle containing the center of inversion; or it is the line itself if it contains the ...

6. Comparison of raster-to-vector conversion software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_raster-to...

   Adjust image (functions) Text recognition Scripting support CAD features. NAME Export universal DXF Available in AutoCAD application Curve recognition Circle ...

7. Image geometry correction - Wikipedia

   en.wikipedia.org/wiki/Image_geometry_correction

   The simplest application of image geometry correction is a specific case known as keystone distortion correction derived from Keystone effect.Keystone distortion gets its name from the symmetric trapezoidal distortion resulting from misaligned projector placement in the vertical dimension (although the term is generally applied to the non-symmetric quadrilateral shape that occurs from an off ...