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Transforms an image from polar or log-polar space to euclidean space.
Namespace: | AvlNet |
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Assembly: | AVL.NET.dll |
Syntax
C++
C#
public static void ImageInversePolarTransform ( AvlNet.Image inImage, AvlNet.Point2D inCenter, AvlNet.PolarSpaceType inInputSpaceType, AvlNet.PolarInterpolationMethod inInterpolation, AvlNet.Image outImage )
Parameters
Name | Type | Range | Default | Description | |
---|---|---|---|---|---|
inImage | AvlNet.Image | Input image. | |||
inCenter | AvlNet.Point2D | Center of the coordinate system in output image. | |||
inInputSpaceType | AvlNet.PolarSpaceType | Method of transformation. | |||
inInterpolation | AvlNet.PolarInterpolationMethod | Method of underlying interpolation. | |||
outImage | AvlNet.Image | Output image. |
Description
Reverses ImagePolarTransform using the following transformation:
\[ src(x,y) = dst(\rho, \phi) \]where
\[ \rho = m \sqrt{x^2 + y^2} , \phi = \arctan(\frac{y}{x}), \]for linear-polar space, and
\[ \rho = k \log{\sqrt{x^2+y^2} }, \phi = \arctan(\frac{y}{x}), \]for log-polar space, which emulates the human "foveal vision".
Parameters \(m\) and \(k\) are chosen so that entire source image could fit into output image.
Transformation does not change image dimensions.