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ImageInversePolarTransform
Transforms an image from polar or log-polar space to euclidean space.
Syntax
C++
C#
void avl::ImageInversePolarTransform ( const avl::Image& inImage, const avl::Point2D& inCenter, avl::PolarSpaceType::Type inInputSpaceType, avl::PolarInterpolationMethod::Type inInterpolation, avl::Image& outImage )
Parameters
Name | Type | Default | Description | |
---|---|---|---|---|
inImage | const Image& | Input image | ||
inCenter | const Point2D& | Center of the coordinate system in output image | ||
inInputSpaceType | PolarSpaceType::Type | Method of transformation | ||
inInterpolation | PolarInterpolationMethod::Type | Method of underlying interpolation | ||
outImage | 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.