// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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#ifndef __OPENCV_PEILIN_HPP__
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#define __OPENCV_PEILIN_HPP__
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#include <opencv2/core.hpp>
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namespace cv { namespace ximgproc {
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//! @addtogroup ximgproc
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//! @{
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/**
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* @brief Calculates an affine transformation that normalize given image using Pei&Lin Normalization.
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*
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* Assume given image \f$I=T(\bar{I})\f$ where \f$\bar{I}\f$ is a normalized image and \f$T\f$ is an affine transformation distorting this image by translation, rotation, scaling and skew.
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* The function returns an affine transformation matrix corresponding to the transformation \f$T^{-1}\f$ described in [PeiLin95].
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* For more details about this implementation, please see
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* [PeiLin95] Soo-Chang Pei and Chao-Nan Lin. Image normalization for pattern recognition. Image and Vision Computing, Vol. 13, N.10, pp. 711-723, 1995.
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*
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* @param I Given transformed image.
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* @return Transformation matrix corresponding to inversed image transformation
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*/
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CV_EXPORTS Matx23d PeiLinNormalization ( InputArray I );
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/** @overload */
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CV_EXPORTS_W void PeiLinNormalization ( InputArray I, OutputArray T );
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}} // namespace
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#endif
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