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