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GRMSegmenterTemplate.txx 3.67 KiB
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/*=========================================================================
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  Program: Generic Region Merging Library
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  Language: C++
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  author: Lassalle Pierre
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  contact: lassallepierre34@gmail.com
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  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved
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     This software is distributed WITHOUT ANY WARRANTY; without even
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     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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     PURPOSE.  See the above copyright notices for more information.
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     Template Model to help the developper to add a new criterion
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     This file as well as his corresponding txx file has to be added
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     src folder.
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=========================================================================*/
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#ifndef __GRM_MYSEGMENTER_TXX
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#define __GRM_MYSEGMENTER_TXX
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#include <otbImageFileReader.h>
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#include <itkImageRegionIterator.h>
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/*
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	Important to read:
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	The graph of segments can be accessed like this: this->m_Graph
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	The number of segments in the graph: this->m_Graph.size()
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	To access to the segment pointer at the position idx: this->m_Graph.m_Nodes[idx]
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	For each segment pointer you can used the following attributes:
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		this->m_Graph.m_Nodes[idx]->m_Perimeter // Perimeter of the segment.
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		this->m_Graph.m_Nodes[idx]->m_Area // Number of pixels contained in the segment.
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		this->m_Graph.m_Nodes[idx]->m_Bbox // Bounding box of the segment:
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			this->m_Graph.m_Nodes[idx]->m_Bbox.m_UX : upper left x coordinate
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			this->m_Graph.m_Nodes[idx]->m_Bbox.m_UY : upper left y coordinate
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			this->m_Graph.m_Nodes[idx]->m_Bbox.m_W : width
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			this->m_Graph.m_Nodes[idx]->m_Bbox.m_UX : height
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		this->m_Graph.m_Nodes[idx]->m_Contour: moves along the contour of the segment:
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			To generate the set of the coordinates of the border pixels:
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				lp::CellLists borderPixels; // (std::unordered_set<long unsigned int>)
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				lp::ContourOperations::GenerateBorderCells(borderPixels, this->m_Graph.m_Nodes[idx]->m_Contour, this->m_Graph.m_Nodes[idx]->m_Id, this->m_ImageWidth);
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		this->m_Graph.m_Nodes[idx]->m_Edges // std::vector<EdgeType> containing edges to adjacent segment
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			Given an edge e:
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				e.GetRegion() : access to the adjacent segment pointer.
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				e.m_Boundary :  lenght of the border between the current segment and the adjacent segment.
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				e.m_Cost: merging cost between the current segment and the adjacent segment.
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*/
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namespace grm
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{
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	template<class TImage>
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	void
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	MySegmenter<TImage>::InitFromImage()
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	{
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		typedef itk::ImageRegionIterator<TImage> ImageIterator;
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		this->m_ImageWidth = this->m_InputImage->GetLargestPossibleRegion().GetSize()[0];
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		this->m_ImageHeight =this->m_InputImage->GetLargestPossibleRegion().GetSize()[1];
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		this->m_NumberOfComponentsPerPixel = this->m_InputImage->GetNumberOfComponentsPerPixel();
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		std::size_t idx = 0;
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		ImageIterator it(this->m_InputImage, this->m_InputImage->GetLargestPossibleRegion());
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		for(it.GoToBegin(); !it.IsAtEnd(); ++it)
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		{
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			// Initialize your specific attributes for each pixel of the image.
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for(std::size_t b = 0; b < this->m_NumberOfComponentsPerPixel; ++b) { // Initialize your specific attributes if they depend on spectral values of pixels. } ++idx; } } template<class TImage> float MySegmenter<TImage>::ComputeMergingCost(NodePointerType n1, NodePointerType n2) { // Determine how to compute the merging cost between the two adjacent segments. } template<class TImage> void MySegmenter<TImage>::UpdateSpecificAttributes(NodePointerType n1, NodePointerType n2) { // Determine how to update your specif attributes when segment n2 is merged into segment n1. // This means that you have to update the specific attributes of segment n1 according to // the specific attributes of segments n1 and n2. } } // end of namespace grm #endif