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Image Registration: Difference between revisions
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==Log-Polar Transformation== | ==Log-Polar Transformation== | ||
See Wolberg and Zokai<ref name="wolberg2000robust">George Wolberg, and Siavash Zokai. ''Robust Image Registration Using Log-Polar Transform'' URL:[https://home.cis.rit.edu/~cnspci/references/wolberg2000.pdf https://home.cis.rit.edu/~cnspci/references/wolberg2000.pdf]. | |||
\( | |||
\DeclareMathOperator{\atantwo}{arctan2} | |||
\) | |||
The log-polar transformation is defined as follows:<br> | |||
<math>r = \sqrt{(x-x_c)^2 + (y-y_c)^2}</math><br> | |||
<math>a = \atantwo(y-y_c, x-x_c)</math><br> | |||
where <math>(x_c, y_c)</math> is the center of the image. | |||
==References== | ==References== | ||