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+///////////////////////////////////////////////////////////////////////////////
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to
+//  this license.  If you do not agree to this license, do not download,
+//  install, copy or use the software.
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2008, Google, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//  * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//  * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//  * The name of Intel Corporation or contributors may not be used to endorse
+//     or promote products derived from this software without specific
+//     prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is"
+// and any express or implied warranties, including, but not limited to, the
+// implied warranties of merchantability and fitness for a particular purpose
+// are disclaimed. In no event shall the Intel Corporation or contributors be
+// liable for any direct, indirect, incidental, special, exemplary, or
+// consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+
+
+/////////////////////////////////////////////////////////////////////////////////
+//
+// Image class which provides a thin layer around an IplImage.  The goals
+// of the class design are:
+//    1. All the data has explicit ownership to avoid memory leaks
+//    2. No hidden allocations or copies for performance.
+//    3. Easy access to OpenCV methods (which will access IPP if available)
+//    4. Can easily treat external data as an image
+//    5. Easy to create images which are subsets of other images
+//    6. Fast pixel access which can take advantage of number of channels
+//          if known at compile time.
+//
+// The WImage class is the image class which provides the data accessors.
+// The 'W' comes from the fact that it is also a wrapper around the popular
+// but inconvenient IplImage class. A WImage can be constructed either using a
+// WImageBuffer class which allocates and frees the data,
+// or using a WImageView class which constructs a subimage or a view into
+// external data.  The view class does no memory management.  Each class
+// actually has two versions, one when the number of channels is known at
+// compile time and one when it isn't.  Using the one with the number of
+// channels specified can provide some compile time optimizations by using the
+// fact that the number of channels is a constant.
+//
+// We use the convention (c,r) to refer to column c and row r with (0,0) being
+// the upper left corner.  This is similar to standard Euclidean coordinates
+// with the first coordinate varying in the horizontal direction and the second
+// coordinate varying in the vertical direction.
+// Thus (c,r) is usually in the domain [0, width) X [0, height)
+//
+// Example usage:
+// WImageBuffer3_b  im(5,7);  // Make a 5X7 3 channel image of type uchar
+// WImageView3_b  sub_im(im, 2,2, 3,3); // 3X3 submatrix
+// vector<float> vec(10, 3.0f);
+// WImageView1_f user_im(&vec[0], 2, 5);  // 2X5 image w/ supplied data
+//
+// im.SetZero();  // same as cvSetZero(im.Ipl())
+// *im(2, 3) = 15;  // Modify the element at column 2, row 3
+// MySetRand(&sub_im);
+//
+// // Copy the second row into the first.  This can be done with no memory
+// // allocation and will use SSE if IPP is available.
+// int w = im.Width();
+// im.View(0,0, w,1).CopyFrom(im.View(0,1, w,1));
+//
+// // Doesn't care about source of data since using WImage
+// void MySetRand(WImage_b* im) { // Works with any number of channels
+//   for (int r = 0; r < im->Height(); ++r) {
+//     float* row = im->Row(r);
+//     for (int c = 0; c < im->Width(); ++c) {
+//        for (int ch = 0; ch < im->Channels(); ++ch, ++row) {
+//          *row = uchar(rand() & 255);
+//        }
+//     }
+//   }
+// }
+//
+// Functions that are not part of the basic image allocation, viewing, and
+// access should come from OpenCV, except some useful functions that are not
+// part of OpenCV can be found in wimage_util.h
+#ifndef __OPENCV_CORE_WIMAGE_HPP__
+#define __OPENCV_CORE_WIMAGE_HPP__
+
+#include "opencv2/core/core_c.h"
+
+#ifdef __cplusplus
+
+namespace cv {
+
+template <typename T> class WImage;
+template <typename T> class WImageBuffer;
+template <typename T> class WImageView;
+
+template<typename T, int C> class WImageC;
+template<typename T, int C> class WImageBufferC;
+template<typename T, int C> class WImageViewC;
+
+// Commonly used typedefs.
+typedef WImage<uchar>            WImage_b;
+typedef WImageView<uchar>        WImageView_b;
+typedef WImageBuffer<uchar>      WImageBuffer_b;
+
+typedef WImageC<uchar, 1>        WImage1_b;
+typedef WImageViewC<uchar, 1>    WImageView1_b;
+typedef WImageBufferC<uchar, 1>  WImageBuffer1_b;
+
+typedef WImageC<uchar, 3>        WImage3_b;
+typedef WImageViewC<uchar, 3>    WImageView3_b;
+typedef WImageBufferC<uchar, 3>  WImageBuffer3_b;
+
+typedef WImage<float>            WImage_f;
+typedef WImageView<float>        WImageView_f;
+typedef WImageBuffer<float>      WImageBuffer_f;
+
+typedef WImageC<float, 1>        WImage1_f;
+typedef WImageViewC<float, 1>    WImageView1_f;
+typedef WImageBufferC<float, 1>  WImageBuffer1_f;
+
+typedef WImageC<float, 3>        WImage3_f;
+typedef WImageViewC<float, 3>    WImageView3_f;
+typedef WImageBufferC<float, 3>  WImageBuffer3_f;
+
+// There isn't a standard for signed and unsigned short so be more
+// explicit in the typename for these cases.
+typedef WImage<short>            WImage_16s;
+typedef WImageView<short>        WImageView_16s;
+typedef WImageBuffer<short>      WImageBuffer_16s;
+
+typedef WImageC<short, 1>        WImage1_16s;
+typedef WImageViewC<short, 1>    WImageView1_16s;
+typedef WImageBufferC<short, 1>  WImageBuffer1_16s;
+
+typedef WImageC<short, 3>        WImage3_16s;
+typedef WImageViewC<short, 3>    WImageView3_16s;
+typedef WImageBufferC<short, 3>  WImageBuffer3_16s;
+
+typedef WImage<ushort>            WImage_16u;
+typedef WImageView<ushort>        WImageView_16u;
+typedef WImageBuffer<ushort>      WImageBuffer_16u;
+
+typedef WImageC<ushort, 1>        WImage1_16u;
+typedef WImageViewC<ushort, 1>    WImageView1_16u;
+typedef WImageBufferC<ushort, 1>  WImageBuffer1_16u;
+
+typedef WImageC<ushort, 3>        WImage3_16u;
+typedef WImageViewC<ushort, 3>    WImageView3_16u;
+typedef WImageBufferC<ushort, 3>  WImageBuffer3_16u;
+
+//
+// WImage definitions
+//
+// This WImage class gives access to the data it refers to.  It can be
+// constructed either by allocating the data with a WImageBuffer class or
+// using the WImageView class to refer to a subimage or outside data.
+template<typename T>
+class WImage
+{
+public:
+    typedef T BaseType;
+
+    // WImage is an abstract class with no other virtual methods so make the
+    // destructor virtual.
+    virtual ~WImage() = 0;
+
+    // Accessors
+    IplImage* Ipl() {return image_; }
+    const IplImage* Ipl() const {return image_; }
+    T* ImageData() { return reinterpret_cast<T*>(image_->imageData); }
+    const T* ImageData() const {
+        return reinterpret_cast<const T*>(image_->imageData);
+    }
+
+    int Width() const {return image_->width; }
+    int Height() const {return image_->height; }
+
+    // WidthStep is the number of bytes to go to the pixel with the next y coord
+    int WidthStep() const {return image_->widthStep; }
+
+    int Channels() const {return image_->nChannels; }
+    int ChannelSize() const {return sizeof(T); }  // number of bytes per channel
+
+    // Number of bytes per pixel
+    int PixelSize() const {return Channels() * ChannelSize(); }
+
+    // Return depth type (e.g. IPL_DEPTH_8U, IPL_DEPTH_32F) which is the number
+    // of bits per channel and with the signed bit set.
+    // This is known at compile time using specializations.
+    int Depth() const;
+
+    inline const T* Row(int r) const {
+        return reinterpret_cast<T*>(image_->imageData + r*image_->widthStep);
+    }
+
+    inline T* Row(int r) {
+        return reinterpret_cast<T*>(image_->imageData + r*image_->widthStep);
+    }
+
+    // Pixel accessors which returns a pointer to the start of the channel
+    inline T* operator() (int c, int r)  {
+        return reinterpret_cast<T*>(image_->imageData + r*image_->widthStep) +
+            c*Channels();
+    }
+
+    inline const T* operator() (int c, int r) const  {
+        return reinterpret_cast<T*>(image_->imageData + r*image_->widthStep) +
+            c*Channels();
+    }
+
+    // Copy the contents from another image which is just a convenience to cvCopy
+    void CopyFrom(const WImage<T>& src) { cvCopy(src.Ipl(), image_); }
+
+    // Set contents to zero which is just a convenient to cvSetZero
+    void SetZero() { cvSetZero(image_); }
+
+    // Construct a view into a region of this image
+    WImageView<T> View(int c, int r, int width, int height);
+
+protected:
+    // Disallow copy and assignment
+    WImage(const WImage&);
+    void operator=(const WImage&);
+
+    explicit WImage(IplImage* img) : image_(img) {
+        assert(!img || img->depth == Depth());
+    }
+
+    void SetIpl(IplImage* image) {
+        assert(!image || image->depth == Depth());
+        image_ = image;
+    }
+
+    IplImage* image_;
+};
+
+
+
+// Image class when both the pixel type and number of channels
+// are known at compile time.  This wrapper will speed up some of the operations
+// like accessing individual pixels using the () operator.
+template<typename T, int C>
+class WImageC : public WImage<T>
+{
+public:
+    typedef typename WImage<T>::BaseType BaseType;
+    enum { kChannels = C };
+
+    explicit WImageC(IplImage* img) : WImage<T>(img) {
+        assert(!img || img->nChannels == Channels());
+    }
+
+    // Construct a view into a region of this image
+    WImageViewC<T, C> View(int c, int r, int width, int height);
+
+    // Copy the contents from another image which is just a convenience to cvCopy
+    void CopyFrom(const WImageC<T, C>& src) {
+        cvCopy(src.Ipl(), WImage<T>::image_);
+    }
+
+    // WImageC is an abstract class with no other virtual methods so make the
+    // destructor virtual.
+    virtual ~WImageC() = 0;
+
+    int Channels() const {return C; }
+
+protected:
+    // Disallow copy and assignment
+    WImageC(const WImageC&);
+    void operator=(const WImageC&);
+
+    void SetIpl(IplImage* image) {
+        assert(!image || image->depth == WImage<T>::Depth());
+        WImage<T>::SetIpl(image);
+    }
+};
+
+//
+// WImageBuffer definitions
+//
+// Image class which owns the data, so it can be allocated and is always
+// freed.  It cannot be copied but can be explicity cloned.
+//
+template<typename T>
+class WImageBuffer : public WImage<T>
+{
+public:
+    typedef typename WImage<T>::BaseType BaseType;
+
+    // Default constructor which creates an object that can be
+    WImageBuffer() : WImage<T>(0) {}
+
+    WImageBuffer(int width, int height, int nchannels) : WImage<T>(0) {
+        Allocate(width, height, nchannels);
+    }
+
+    // Constructor which takes ownership of a given IplImage so releases
+    // the image on destruction.
+    explicit WImageBuffer(IplImage* img) : WImage<T>(img) {}
+
+    // Allocate an image.  Does nothing if current size is the same as
+    // the new size.
+    void Allocate(int width, int height, int nchannels);
+
+    // Set the data to point to an image, releasing the old data
+    void SetIpl(IplImage* img) {
+        ReleaseImage();
+        WImage<T>::SetIpl(img);
+    }
+
+    // Clone an image which reallocates the image if of a different dimension.
+    void CloneFrom(const WImage<T>& src) {
+        Allocate(src.Width(), src.Height(), src.Channels());
+        CopyFrom(src);
+    }
+
+    ~WImageBuffer() {
+        ReleaseImage();
+    }
+
+    // Release the image if it isn't null.
+    void ReleaseImage() {
+        if (WImage<T>::image_) {
+            IplImage* image = WImage<T>::image_;
+            cvReleaseImage(&image);
+            WImage<T>::SetIpl(0);
+        }
+    }
+
+    bool IsNull() const {return WImage<T>::image_ == NULL; }
+
+private:
+    // Disallow copy and assignment
+    WImageBuffer(const WImageBuffer&);
+    void operator=(const WImageBuffer&);
+};
+
+// Like a WImageBuffer class but when the number of channels is known
+// at compile time.
+template<typename T, int C>
+class WImageBufferC : public WImageC<T, C>
+{
+public:
+    typedef typename WImage<T>::BaseType BaseType;
+    enum { kChannels = C };
+
+    // Default constructor which creates an object that can be
+    WImageBufferC() : WImageC<T, C>(0) {}
+
+    WImageBufferC(int width, int height) : WImageC<T, C>(0) {
+        Allocate(width, height);
+    }
+
+    // Constructor which takes ownership of a given IplImage so releases
+    // the image on destruction.
+    explicit WImageBufferC(IplImage* img) : WImageC<T, C>(img) {}
+
+    // Allocate an image.  Does nothing if current size is the same as
+    // the new size.
+    void Allocate(int width, int height);
+
+    // Set the data to point to an image, releasing the old data
+    void SetIpl(IplImage* img) {
+        ReleaseImage();
+        WImageC<T, C>::SetIpl(img);
+    }
+
+    // Clone an image which reallocates the image if of a different dimension.
+    void CloneFrom(const WImageC<T, C>& src) {
+        Allocate(src.Width(), src.Height());
+        CopyFrom(src);
+    }
+
+    ~WImageBufferC() {
+        ReleaseImage();
+    }
+
+    // Release the image if it isn't null.
+    void ReleaseImage() {
+        if (WImage<T>::image_) {
+            IplImage* image = WImage<T>::image_;
+            cvReleaseImage(&image);
+            WImageC<T, C>::SetIpl(0);
+        }
+    }
+
+    bool IsNull() const {return WImage<T>::image_ == NULL; }
+
+private:
+    // Disallow copy and assignment
+    WImageBufferC(const WImageBufferC&);
+    void operator=(const WImageBufferC&);
+};
+
+//
+// WImageView definitions
+//
+// View into an image class which allows treating a subimage as an image
+// or treating external data as an image
+//
+template<typename T>
+class WImageView : public WImage<T>
+{
+public:
+    typedef typename WImage<T>::BaseType BaseType;
+
+    // Construct a subimage.  No checks are done that the subimage lies
+    // completely inside the original image.
+    WImageView(WImage<T>* img, int c, int r, int width, int height);
+
+    // Refer to external data.
+    // If not given width_step assumed to be same as width.
+    WImageView(T* data, int width, int height, int channels, int width_step = -1);
+
+    // Refer to external data.  This does NOT take ownership
+    // of the supplied IplImage.
+    WImageView(IplImage* img) : WImage<T>(img) {}
+
+    // Copy constructor
+    WImageView(const WImage<T>& img) : WImage<T>(0) {
+        header_ = *(img.Ipl());
+        WImage<T>::SetIpl(&header_);
+    }
+
+    WImageView& operator=(const WImage<T>& img) {
+        header_ = *(img.Ipl());
+        WImage<T>::SetIpl(&header_);
+        return *this;
+    }
+
+protected:
+    IplImage header_;
+};
+
+
+template<typename T, int C>
+class WImageViewC : public WImageC<T, C>
+{
+public:
+    typedef typename WImage<T>::BaseType BaseType;
+    enum { kChannels = C };
+
+    // Default constructor needed for vectors of views.
+    WImageViewC();
+
+    virtual ~WImageViewC() {}
+
+    // Construct a subimage.  No checks are done that the subimage lies
+    // completely inside the original image.
+    WImageViewC(WImageC<T, C>* img,
+        int c, int r, int width, int height);
+
+    // Refer to external data
+    WImageViewC(T* data, int width, int height, int width_step = -1);
+
+    // Refer to external data.  This does NOT take ownership
+    // of the supplied IplImage.
+    WImageViewC(IplImage* img) : WImageC<T, C>(img) {}
+
+    // Copy constructor which does a shallow copy to allow multiple views
+    // of same data.  gcc-4.1.1 gets confused if both versions of
+    // the constructor and assignment operator are not provided.
+    WImageViewC(const WImageC<T, C>& img) : WImageC<T, C>(0) {
+        header_ = *(img.Ipl());
+        WImageC<T, C>::SetIpl(&header_);
+    }
+    WImageViewC(const WImageViewC<T, C>& img) : WImageC<T, C>(0) {
+        header_ = *(img.Ipl());
+        WImageC<T, C>::SetIpl(&header_);
+    }
+
+    WImageViewC& operator=(const WImageC<T, C>& img) {
+        header_ = *(img.Ipl());
+        WImageC<T, C>::SetIpl(&header_);
+        return *this;
+    }
+    WImageViewC& operator=(const WImageViewC<T, C>& img) {
+        header_ = *(img.Ipl());
+        WImageC<T, C>::SetIpl(&header_);
+        return *this;
+    }
+
+protected:
+    IplImage header_;
+};
+
+
+// Specializations for depth
+template<>
+inline int WImage<uchar>::Depth() const {return IPL_DEPTH_8U; }
+template<>
+inline int WImage<signed char>::Depth() const {return IPL_DEPTH_8S; }
+template<>
+inline int WImage<short>::Depth() const {return IPL_DEPTH_16S; }
+template<>
+inline int WImage<ushort>::Depth() const {return IPL_DEPTH_16U; }
+template<>
+inline int WImage<int>::Depth() const {return IPL_DEPTH_32S; }
+template<>
+inline int WImage<float>::Depth() const {return IPL_DEPTH_32F; }
+template<>
+inline int WImage<double>::Depth() const {return IPL_DEPTH_64F; }
+
+//
+// Pure virtual destructors still need to be defined.
+//
+template<typename T> inline WImage<T>::~WImage() {}
+template<typename T, int C> inline WImageC<T, C>::~WImageC() {}
+
+//
+// Allocate ImageData
+//
+template<typename T>
+inline void WImageBuffer<T>::Allocate(int width, int height, int nchannels)
+{
+    if (IsNull() || WImage<T>::Width() != width ||
+        WImage<T>::Height() != height || WImage<T>::Channels() != nchannels) {
+        ReleaseImage();
+        WImage<T>::image_ = cvCreateImage(cvSize(width, height),
+            WImage<T>::Depth(), nchannels);
+    }
+}
+
+template<typename T, int C>
+inline void WImageBufferC<T, C>::Allocate(int width, int height)
+{
+    if (IsNull() || WImage<T>::Width() != width || WImage<T>::Height() != height) {
+        ReleaseImage();
+        WImageC<T, C>::SetIpl(cvCreateImage(cvSize(width, height),WImage<T>::Depth(), C));
+    }
+}
+
+//
+// ImageView methods
+//
+template<typename T>
+WImageView<T>::WImageView(WImage<T>* img, int c, int r, int width, int height)
+        : WImage<T>(0)
+{
+    header_ = *(img->Ipl());
+    header_.imageData = reinterpret_cast<char*>((*img)(c, r));
+    header_.width = width;
+    header_.height = height;
+    WImage<T>::SetIpl(&header_);
+}
+
+template<typename T>
+WImageView<T>::WImageView(T* data, int width, int height, int nchannels, int width_step)
+          : WImage<T>(0)
+{
+    cvInitImageHeader(&header_, cvSize(width, height), WImage<T>::Depth(), nchannels);
+    header_.imageData = reinterpret_cast<char*>(data);
+    if (width_step > 0) {
+        header_.widthStep = width_step;
+    }
+    WImage<T>::SetIpl(&header_);
+}
+
+template<typename T, int C>
+WImageViewC<T, C>::WImageViewC(WImageC<T, C>* img, int c, int r, int width, int height)
+        : WImageC<T, C>(0)
+{
+    header_ = *(img->Ipl());
+    header_.imageData = reinterpret_cast<char*>((*img)(c, r));
+    header_.width = width;
+    header_.height = height;
+    WImageC<T, C>::SetIpl(&header_);
+}
+
+template<typename T, int C>
+WImageViewC<T, C>::WImageViewC() : WImageC<T, C>(0) {
+    cvInitImageHeader(&header_, cvSize(0, 0), WImage<T>::Depth(), C);
+    header_.imageData = reinterpret_cast<char*>(0);
+    WImageC<T, C>::SetIpl(&header_);
+}
+
+template<typename T, int C>
+WImageViewC<T, C>::WImageViewC(T* data, int width, int height, int width_step)
+    : WImageC<T, C>(0)
+{
+    cvInitImageHeader(&header_, cvSize(width, height), WImage<T>::Depth(), C);
+    header_.imageData = reinterpret_cast<char*>(data);
+    if (width_step > 0) {
+        header_.widthStep = width_step;
+    }
+    WImageC<T, C>::SetIpl(&header_);
+}
+
+// Construct a view into a region of an image
+template<typename T>
+WImageView<T> WImage<T>::View(int c, int r, int width, int height) {
+    return WImageView<T>(this, c, r, width, height);
+}
+
+template<typename T, int C>
+WImageViewC<T, C> WImageC<T, C>::View(int c, int r, int width, int height) {
+    return WImageViewC<T, C>(this, c, r, width, height);
+}
+
+}  // end of namespace
+
+#endif // __cplusplus
+
+#endif