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cxUnsignedDerivedImage.cpp
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1 /*=========================================================================
2 This file is part of CustusX, an Image Guided Therapy Application.
3 
4 Copyright (c) 2008-2014, SINTEF Department of Medical Technology
5 All rights reserved.
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7 Redistribution and use in source and binary forms, with or without
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10 1. Redistributions of source code must retain the above copyright notice,
11  this list of conditions and the following disclaimer.
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13 2. Redistributions in binary form must reproduce the above copyright notice,
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31 =========================================================================*/
32 
33 
34 #include "cxUnsignedDerivedImage.h"
35 
36 #include <vtkUnsignedCharArray.h>
37 #include <vtkImageData.h>
38 #include <vtkPointData.h>
39 #include <vtkDoubleArray.h>
40 
41 #include "cxImage.h"
42 
43 #include <vtkImageResample.h>
44 #include <vtkImageClip.h>
45 #include "vtkImageShiftScale.h"
46 
47 #include "cxImage.h"
48 #include "cxUtilHelpers.h"
49 #include "cxImageTF3D.h"
50 #include "cxImageLUT2D.h"
52 
53 
55 #include "cxLogger.h"
56 
57 typedef vtkSmartPointer<vtkDoubleArray> vtkDoubleArrayPtr;
58 
59 namespace cx
60 {
61 
63 {
64  boost::shared_ptr<UnsignedDerivedImage> retval;
65  retval.reset(new UnsignedDerivedImage(base));
66  return retval;
67 }
68 
69 UnsignedDerivedImage::UnsignedDerivedImage(ImagePtr base) : Image(base->getUid()+"_u", vtkImageDataPtr(), base->getName())
70 {
71  this->mBase = base;
72 
73  // redirected signals:
74  connect(base.get(), SIGNAL(transformChanged()), this, SIGNAL(transformChanged()));
75  connect(base.get(), SIGNAL(propertiesChanged()), this, SIGNAL(propertiesChanged()));
76  connect(base.get(), SIGNAL(clipPlanesChanged()), this, SIGNAL(clipPlanesChanged()));
77  connect(base.get(), SIGNAL(cropBoxChanged()), this, SIGNAL(cropBoxChanged()));
78 
79  // override signals:
80  connect(base.get(), SIGNAL(transferFunctionsChanged()), this, SLOT(unsignedTransferFunctionsChangedSlot()));
81  connect(base.get(), SIGNAL(vtkImageDataChanged()), this, SLOT(unsignedImageChangedSlot()));
82 
83  connect(this, SIGNAL(transferFunctionsChanged()), this, SLOT(testSlot()));
84  this->unsignedImageChangedSlot();
85  this->unsignedTransferFunctionsChangedSlot();
86 }
87 
88 void UnsignedDerivedImage::testSlot()
89 {
90 }
91 
92 void UnsignedDerivedImage::unsignedTransferFunctionsChangedSlot()
93 {
94  ImagePtr base = mBase.lock();
95  if (!base)
96  return;
97 
98 
99  // this is a slow operation, triggered every time the mBase is changed. Take care.
100 
101  int shift = this->findShift();
102 
103  ImageTF3DPtr TF3D = base->getTransferFunctions3D()->createCopy();
104  ImageLUT2DPtr LUT2D = base->getLookupTable2D()->createCopy();
105  TF3D->shift(shift);
106  LUT2D->shift(shift);
107  this->setLookupTable2D(LUT2D);
108  this->setTransferFunctions3D(TF3D);
109 }
110 
111 void UnsignedDerivedImage::unsignedImageChangedSlot()
112 {
113  this->setVtkImageData(this->convertImage());
114 }
115 
116 int UnsignedDerivedImage::findShift()
117 {
118  ImagePtr base = mBase.lock();
119  if (!base)
120  return 0;
121  vtkImageDataPtr input = base->getBaseVtkImageData();
122 
123  if (input->GetScalarTypeMin() >= 0)
124  return 0;
125 
126  // start by shifting up to zero
127  int shift = -input->GetScalarRange()[0];
128  // if CT: always shift by 1024 (houndsfield units definition)
129  if (base->getModality().contains("CT", Qt::CaseInsensitive))
130  shift = 1024;
131  return shift;
132 }
133 
134 vtkImageDataPtr UnsignedDerivedImage::convertImage()
135 {
136  vtkImageDataPtr retval;
137 
138  ImagePtr base = mBase.lock();
139  if (!base)
140  return retval;
141 
142  int shift = this->findShift();
143  vtkImageDataPtr input = base->getBaseVtkImageData();
144 
145  vtkImageShiftScalePtr cast = vtkImageShiftScalePtr::New();
146  cast->SetInputData(input);
147  cast->ClampOverflowOn();
148 
149  cast->SetShift(shift);
150 
151  // total intensity range of voxels:
152  double range = input->GetScalarRange()[1] - input->GetScalarRange()[0];
153 
154  // to to fit within smallest type
155  if (range <= VTK_UNSIGNED_SHORT_MAX-VTK_UNSIGNED_SHORT_MIN)
156  cast->SetOutputScalarType(VTK_UNSIGNED_SHORT);
157  else if (range <= VTK_UNSIGNED_INT_MAX-VTK_UNSIGNED_INT_MIN)
158  cast->SetOutputScalarType(VTK_UNSIGNED_INT);
159 // else if (range <= VTK_UNSIGNED_LONG_MAX-VTK_UNSIGNED_LONG_MIN) // not supported by vtk - it seems (crash in rendering)
160 // cast->SetOutputScalarType(VTK_UNSIGNED_LONG);
161  else
162  cast->SetOutputScalarType(VTK_UNSIGNED_INT);
163 
164  cast->Update();
165 // if (verbose)
166  report(QString("Converting image %1 from %2 to %3").arg(this->getName()).arg(input->GetScalarTypeAsString()).arg(cast->GetOutput()->GetScalarTypeAsString()));
167  retval = cast->GetOutput();
168  return retval;
169 }
170 
172 {
174 }
175 
176 }
virtual void setTransferFunctions3D(ImageTF3DPtr transferFuntion)
Definition: cxImage.cpp:332
vtkSmartPointer< class vtkImageShiftScale > vtkImageShiftScalePtr
virtual void setVtkImageData(const vtkImageDataPtr &data, bool resetTransferFunctions=true)
Definition: cxImage.cpp:289
void propertiesChanged()
emitted when one of the metadata properties (uid, name etc) changes
#define CALL_IN_WEAK_PTR(weak_base, func, defarg)
virtual void setLookupTable2D(ImageLUT2DPtr imageLookupTable2D)
Definition: cxImage.cpp:351
void transformChanged()
emitted when transform is changed
boost::shared_ptr< class Image > ImagePtr
Definition: cxDicomWidget.h:48
static ImagePtr create(ImagePtr base)
void clipPlanesChanged()
boost::shared_ptr< class ImageLUT2D > ImageLUT2DPtr
A volumetric data set.
Definition: cxImage.h:66
vtkSmartPointer< vtkDoubleArray > vtkDoubleArrayPtr
void transferFunctionsChanged()
emitted when image transfer functions in 2D or 3D are changed.
Identification of a Coordinate system.
Class that holds an unsigned version of a base Image.
virtual QString getName() const
void report(QString msg)
Definition: cxLogger.cpp:90
void cropBoxChanged()
void vtkImageDataChanged()
emitted when the vktimagedata are invalidated and must be retrieved anew.
vtkSmartPointer< class vtkImageData > vtkImageDataPtr
boost::shared_ptr< class ImageTF3D > ImageTF3DPtr
virtual CoordinateSystem getCoordinateSystem()