Polar images are recorded as a matrix in which each element of the matrix is an intensity value whose location is expressed in polar coordinates. The origin of the coordinate system is defined as the center of the image, and the location of each intensity sample is expressed as a radial distance r from the center along a particular angular direction θ. Typically, each row in the image matrix contains all of the angular samples for a particular radial distance, and each column of the image matrix contains all of the radial samples for a particular angular direction.
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(2009). Polar. In: Li, S.Z., Jain, A. (eds) Encyclopedia of Biometrics. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-73003-5_632
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DOI: https://doi.org/10.1007/978-0-387-73003-5_632
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