libossim-dev 2.2.2-1 / usr / include / ossim / projection / ossimImageViewTransform.h

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//*******************************************************************
//
// License:  See top level LICENSE.txt file.
// 
// Author:  Garrett Potts (gpotts@imagelinks.com)
//
// Description:  This class hides the image view transformation process.
//               We should be able to open up ay image within the system
//               and be able to map it to the view space.  Classes need to
//               derive and override the methods within this class.  This will
//               mainly be used in the resampling process.
//
//*******************************************************************
//  $Id: ossimImageViewTransform.h 18397 2010-11-09 19:13:46Z gpotts $
#ifndef ossimImageViewTransform_HEADER
#define ossimImageViewTransform_HEADER
#include <iostream>
using namespace std;
#include <ossim/base/ossimViewInterface.h>
#include <ossim/base/ossimObject.h>
#include <ossim/base/ossimDpt.h>
#include <ossim/base/ossimDrect.h>
#include <ossim/base/ossim2dTo2dTransform.h>

class OSSIMDLLEXPORT ossimImageViewTransform : public ossim2dTo2dTransform,
					       public ossimViewInterface
{
public:
   friend OSSIMDLLEXPORT ostream& operator<<(ostream& out,
					     const ossimImageViewTransform& data);
   
   ossimImageViewTransform();

   virtual void forward(const ossimDpt& input, ossimDpt& output) const;
   virtual void inverse(const ossimDpt& input, ossimDpt& output) const;
  
  /*!
   * derived classes will specify if the imageViewTransform is an
   * identity.  
   */
   virtual bool isIdentity()const=0;


   virtual bool isValid()const=0;
   virtual ossimDpt getInputMetersPerPixel()const=0;
   virtual ossimDpt getOutputMetersPerPixel()const=0;
   /*!
   * If it needs to it will use the information passed in to get the
   * scae factor by transforming the line point.x to point.x+deltaXY and 
   * point.y to point.y + deltaXY.y.  It will comput new delta's and 
   * set the ratio of deltaXY/newDeltaXY to the result scale.  
   *
   * Derived classes can overide this default implementation.  Note:
   * if the scale changes are only subpixel then it will return a scale
   * of one.  We have to see how this works before we actually keep this
   * implementation.
   */
  virtual void getImageToViewScale(ossimDpt& resultScale,
				   const ossimDpt& imagePoint,
				   const ossimDpt& deltaImagePointXY)const;

  /*!
   * If it needs to it will use the information passed in to get the
   * scae factor by transforming the line point.x to point.x+deltaXY and 
   * point.y to point.y + deltaXY.y.  It will comput new delta's and 
   * set the ratio of deltaXY/newDeltaXY to the result scale.  
   *
   * Derived classes can overide this default implementation.  Note:
   * if the scale changes are only subpixel then it will return a scale
   * of one.  We have to see how this works before we actually keep this
   * implementation.
   */
  virtual void getViewToImageScale(ossimDpt& resultScale,
				   const ossimDpt& imagePoint,
				   const ossimDpt& deltaImagePointXY)const;
  
  virtual void imageToView(const ossimDpt& imagePoint,
                           ossimDpt&       viewPoint)const;
  
  virtual void viewToImage(const ossimDpt& viewPoint,
                           ossimDpt&       imagePoint)const;
  
  virtual std::ostream& print(std::ostream& out) const;
  
  ossimDpt imageToView(const ossimDpt& imagePoint)const;
  
  ossimDpt viewToImage(const ossimDpt& viewPoint)const;
  
  /*!
   * This should compute output/input.
   */
  virtual void getScaleChangeImageToView(ossimDpt& result,
                                         const ossimDrect& imageRect);
  /*!
   * This should compute output/input.
   */
  virtual void getScaleChangeViewToImage(ossimDpt& result,
                                         const ossimDrect& viewRect);
  
  virtual void getRoundTripErrorView(ossimDpt& result,
				     const ossimDpt& viewPt)const;
  
  virtual ossimDpt getRoundTripErrorView(const ossimDpt& viewPt)const;
  
  virtual void getRoundTripErrorImage(ossimDpt& result,
                                      const ossimDpt& imagePt)const;
  
  virtual ossimDpt getRoundTripErrorImage(const ossimDpt& imagePt)const;

  /** Computes the bounding rect in view space of the quad formed by the transformed image points
   * of the input rect corners. */
  virtual ossimDrect getImageToViewBounds(const ossimDrect& imageRect) const;

  /** Computes the bounding rect in image space of the quad formed by the transformed view points
   * of the input rect corners. */
  virtual ossimDrect getViewToImageBounds(const ossimDrect& viewRect) const;
  
  virtual bool loadState(const ossimKeywordlist& kwl,
                         const char* prefix =0);
  
  virtual bool saveState(ossimKeywordlist& kwl,
                         const char* prefix = 0)const;

TYPE_DATA
};

#endif

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