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Implemented Radon transform.
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‎modules/README.md‎

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@@ -46,7 +46,7 @@ $ cmake -D OPENCV_EXTRA_MODULES_PATH=<opencv_contrib>/modules -D BUILD_opencv_re
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19. **opencv_xfeatures2d**: Extra 2D Features Framework containing experimental and non-free 2D feature algorithms.
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20. **opencv_ximgproc**: Extended Image Processing: Structured Forests / Domain Transform Filter / Guided Filter / Adaptive Manifold Filter / Joint Bilateral Filter / Superpixels.
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20. **opencv_ximgproc**: Extended Image Processing: Structured Forests / Domain Transform Filter / Guided Filter / Adaptive Manifold Filter / Joint Bilateral Filter / Superpixels / Radon transform.
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21. **opencv_xobjdetect**: Integral Channel Features Detector Framework.
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‎modules/ximgproc/README.md‎

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Extended Image Processing
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=========================
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1. Structured Forests
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1. Structured Forests
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2. Domain Transform Filter
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3. Guided Filter
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4. Adaptive Manifold Filter
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5. Joint Bilateral Filter
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6. Superpixels
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7. Graph segmentation
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8. Selective search from segmentation
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9. Radon Transform

‎modules/ximgproc/doc/ximgproc.bib‎

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pages={2830--2837},
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year={2014},
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organization={IEEE}
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@phdthesis{7910dc8d5b654c90ac4bc94c67d06f01,
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title = "The Radon Transform - Theory and Implementation",
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author = "Toft, {Peter Aundal} and Sørensen, {John Aasted}",
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year = "1996",
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month = "11",
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publisher = "Technical University of Denmark (DTU)",
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}

‎modules/ximgproc/include/opencv2/ximgproc.hpp‎

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* By downloading, copying, installing or using the software you agree to this license.
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* If you do not agree to this license, do not download, install,
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* copy or use the software.
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*
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*
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*
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*
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* License Agreement
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* For Open Source Computer Vision Library
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* (3 - clause BSD License)
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*
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met :
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*
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*
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* *Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and / or other materials provided with the distribution.
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*
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*
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* * Neither the names of the copyright holders nor the names of the contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* This software is provided by the copyright holders and contributors "as is" and
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* any express or implied warranties, including, but not limited to, the implied
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* warranties of merchantability and fitness for a particular purpose are disclaimed.
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#include "ximgproc/weighted_median_filter.hpp"
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#include "ximgproc/slic.hpp"
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#include "ximgproc/lsc.hpp"
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#include "ximgproc/radon_transform.hpp"
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/** @defgroup ximgproc Extended Image Processing
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@{

‎modules/ximgproc/include/opencv2/ximgproc/radon_transform.hpp‎

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/****************************************************************************************
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* By downloading, copying, installing or using the software you agree to this license. *
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* If you do not agree to this license, do not download, install, *
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* copy or use the software. *
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* *
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* *
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* License Agreement *
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* For Open Source Computer Vision Library *
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* (3-clause BSD License) *
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* *
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* Copyright (C) 2000-2016, Intel Corporation, all rights reserved. *
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* Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved. *
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* Copyright (C) 2009-2016, NVIDIA Corporation, all rights reserved. *
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* Copyright (C) 2010-2013, Advanced Micro Devices, Inc., all rights reserved. *
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* Copyright (C) 2015-2016, OpenCV Foundation, all rights reserved. *
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* Copyright (C) 2015-2016, Itseez Inc., all rights reserved. *
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* Third party copyrights are property of their respective owners. *
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* *
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* Redistribution and use in source and binary forms, with or without modification, *
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* are permitted provided that the following conditions are met: *
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* *
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* Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* Redistributions in binary form must reproduce the above copyright notice, *
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* this list of conditions and the following disclaimer in the documentation *
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* and/or other materials provided with the distribution. *
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* *
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* Neither the names of the copyright holders nor the names of the contributors *
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* may be used to endorse or promote products derived from this software *
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* without specific prior written permission. *
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* *
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* This software is provided by the copyright holders and contributors "as is" and *
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* any express or implied warranties, including, but not limited to, the implied *
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* warranties of merchantability and fitness for a particular purpose are disclaimed. *
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* In no event shall copyright holders or contributors be liable for any direct, *
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* indirect, incidental, special, exemplary, or consequential damages *
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* (including, but not limited to, procurement of substitute goods or services; *
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* loss of use, data, or profits; or business interruption) however caused *
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* and on any theory of liability, whether in contract, strict liability, *
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* or tort (including negligence or otherwise) arising in any way out of *
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* the use of this software, even if advised of the possibility of such damage. *
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****************************************************************************************/
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/**
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* @author {aravind | [email protected]}
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* Created on Sun, Feb 14 2016
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*/
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/**
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* Implementation of "The Radon Transform - Theory and Implementation"
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* by "Toft, {Peter Aundal} and Sørensen, {John Aasted}"
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*
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* Online publication: http://petertoft.dk/PhD/
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*
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*/
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#ifndef __OPENCV_RADON_TRANSFORM_HPP__
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#define __OPENCV_RADON_TRANSFORM_HPP__
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#ifdef __cplusplus
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#include "opencv2/core.hpp"
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namespace cv {
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namespace ximgproc {
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/**
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* Flags for range of angles
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* AR_x_y : theta lies in [x, y] ( both x and y inclusive )
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*/
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enum RadonAngleRange { AR_1_45 = 1,
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AR_46_89 = 2,
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AR_90 = 4,
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AR_91_135 = 8,
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AR_136_179 = 16,
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AR_180 = 32
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};
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/**
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* Specifies binary operations
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* The enum specifies four binary operations,
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* viz. Minimum, Maximum, Average and sum
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* of the Radon transformed images.
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*/
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enum RadonOp { RT_MIN = 1,
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RT_MAX = 2,
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RT_AVE = 4,
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RT_SUM = 8
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};
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/**
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* [radonTransform Computes the Radon transform of the given image]
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* @param src [Input source image]
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* @param dst [Output image]
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* @param angleRange [One of the enums, RadonAngleRange, defaults to 63 ( 1 to 180 degrees)]
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* @param operation [One of the enums, RadonOp, defaults to RT_SUM ( SUM OPERATION )]
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* @param opDst [Output image of the operation perfomed, defaults to noArray()]
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*/
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CV_EXPORTS void radonTransform( InputArray src,
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OutputArray dst,
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int angleRange = 63,
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int operation = RT_SUM,
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OutputArray opDst = noArray()
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);
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}
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}
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#endif // __cplusplus
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#endif // __OPENCV_RADON_TRANSFORM_HPP__

‎modules/ximgproc/samples/radon_input.jpg‎

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‎modules/ximgproc/samples/radon_transform.cpp‎

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/****************************************************************************************
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* By downloading, copying, installing or using the software you agree to this license. *
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* If you do not agree to this license, do not download, install, *
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* copy or use the software. *
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* *
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* *
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* License Agreement *
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* For Open Source Computer Vision Library *
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* (3-clause BSD License) *
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* *
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* Copyright (C) 2000-2016, Intel Corporation, all rights reserved. *
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* Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved. *
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* Copyright (C) 2009-2016, NVIDIA Corporation, all rights reserved. *
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* Copyright (C) 2010-2013, Advanced Micro Devices, Inc., all rights reserved. *
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* Copyright (C) 2015-2016, OpenCV Foundation, all rights reserved. *
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* Copyright (C) 2015-2016, Itseez Inc., all rights reserved. *
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* Third party copyrights are property of their respective owners. *
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* *
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* Redistribution and use in source and binary forms, with or without modification, *
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* are permitted provided that the following conditions are met: *
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* *
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* Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* Redistributions in binary form must reproduce the above copyright notice, *
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* this list of conditions and the following disclaimer in the documentation *
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* and/or other materials provided with the distribution. *
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* *
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* Neither the names of the copyright holders nor the names of the contributors *
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* may be used to endorse or promote products derived from this software *
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* without specific prior written permission. *
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* *
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* This software is provided by the copyright holders and contributors "as is" and *
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* any express or implied warranties, including, but not limited to, the implied *
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* warranties of merchantability and fitness for a particular purpose are disclaimed. *
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* In no event shall copyright holders or contributors be liable for any direct, *
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* indirect, incidental, special, exemplary, or consequential damages *
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* (including, but not limited to, procurement of substitute goods or services; *
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* loss of use, data, or profits; or business interruption) however caused *
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* and on any theory of liability, whether in contract, strict liability, *
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* or tort (including negligence or otherwise) arising in any way out of *
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* the use of this software, even if advised of the possibility of such damage. *
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****************************************************************************************/
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/**
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* @author {aravind | [email protected]}
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* Created on Mon, Feb 15 2016
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*/
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/**
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*
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* C++ Sample program for Radon transform
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*
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*/
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// Necessary headers
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#include <math.h>
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#include <stdlib.h>
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#include <string>
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#include <iostream>
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#include <opencv2/imgproc.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/core/utility.hpp>
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#include <opencv2/ximgproc.hpp>
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using namespace cv::ximgproc;
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using namespace cv;
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using namespace std;
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static void help ( const char **argv ) {
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std::cout << std::endl \
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<< "This program demonstrates the usage of Radon transform." \
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<< std::endl << std::endl << "USAGE: " << std::endl \
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<< argv[0] << " <filename> <angle-range-option> <operation>" \
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<< std::endl << std::endl;
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std::cout << "Default for <angle-range-option> computes for " \
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<< "all angles between 1 and 180 degrees." \
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<< " ( @see cv::ximgproc::RadonAngleRange )" << std::endl \
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<< "Default for <operation> is RT_SUM." \
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<< " ( @see cv::ximgproc::RadonOp )" << std::endl \
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<< std::endl; \
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}
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static bool argParser( int argc, const char **argv,
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cv::Mat & img,
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int & radonAngleRange,
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int & radonOperation ) {
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if (argc > 4) {
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std::cout << "Incorrect arguments" << std::endl;
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return false;
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}
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const char *filename = argc >= 2 ? argv[1]
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: "./radon_input.jpg";
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img = imread(filename, 0);
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if( img.empty() ) {
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std::cout << "Unable to load image: " << filename << std::endl;
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return false;
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}
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radonAngleRange = ( argc >= 3 ) ? atoi(argv[2]) : 63; // 1 to 180 degrees
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radonOperation = ( argc >= 4 ) ? atoi(argv[3]) : RT_SUM; // Sum up elements
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return true;
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}
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int main( int argc, const char ** argv ) {
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cv::Mat img;
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int radonAngleRange, radonOperation;
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// Display help
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help( argv );
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if( !argParser( argc, argv, img, radonAngleRange, radonOperation) ) {
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return -1;
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}
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cv::Mat radonTr, operImg;
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// Computing the Radon transform with appropriate params
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radonTransform( img, radonTr, radonAngleRange, radonOperation, operImg );
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// Mat for displaying the Radon transform
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cv::Mat radonTrDisp;
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double minVal, maxVal;
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minMaxLoc(radonTr, &minVal, &maxVal);
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// Normalizing radonTr so as to display as a CV_8U image
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radonTr -= minVal;
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radonTr.convertTo( radonTrDisp, CV_8U, 255.0/(maxVal-minVal) );
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// Normalizing operImg so as to display as a CV_8U image
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minMaxLoc(operImg, &minVal, &maxVal);
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operImg -= minVal;
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operImg.convertTo(operImg, CV_8U, 255.0/(maxVal-minVal));
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// Displaying the images
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cv::imshow("Input", img);
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cv::imshow("Radon transform", radonTrDisp);
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cv::imshow("Operation(image)", operImg);
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cv::waitKey(0);
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cv::destroyAllWindows();
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return 0;
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}

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