VTK FixedPointVolumeRayCastMapperCT 体渲染
作者：互联网
1 #include <vtkFixedPointVolumeRayCastMapper.h>
2
3 #include <vtkBoxWidget.h>
4 #include <vtkCamera.h>
5 #include <vtkCommand.h>
6 #include <vtkColorTransferFunction.h>
7 #include <vtkDICOMImageReader.h>
8 #include <vtkImageData.h>
9 #include <vtkImageResample.h>
10 #include <vtkMetaImageReader.h>
11 #include <vtkPiecewiseFunction.h>
12 #include <vtkPlanes.h>
13 #include <vtkProperty.h>
14 #include <vtkRenderer.h>
15 #include <vtkRenderWindow.h>
16 #include <vtkRenderWindowInteractor.h>
17 #include <vtkVolume.h>
18 #include <vtkVolumeProperty.h>
19 #include <vtkXMLImageDataReader.h>
20 #include <vtkNamedColors.h>
21
22 #define VTI_FILETYPE 1
23 #define MHA_FILETYPE 2
24
25 namespace
26 {
27 void PrintUsage()
28 {
29 cout << "Usage: " << endl;
30 cout << endl;
31 cout << " FixedPointVolumeRayCastMapperCT <options>" << endl;
32 cout << endl;
33 cout << "where options may include: " << endl;
34 cout << endl;
35 cout << " -DICOM <directory>" << endl;
36 cout << " -VTI <filename>" << endl;
37 cout << " -MHA <filename>" << endl;
38 cout << " -DependentComponents" << endl;
39 cout << " -Clip" << endl;
40 cout << " -MIP <window> <level>" << endl;
41 cout << " -CompositeRamp <window> <level>" << endl;
42 cout << " -CompositeShadeRamp <window> <level>" << endl;
43 cout << " -CT_Skin" << endl;
44 cout << " -CT_Bone" << endl;
45 cout << " -CT_Muscle" << endl;
46 cout << " -FrameRate <rate>" << endl;
47 cout << " -DataReduction <factor>" << endl;
48 cout << endl;
49 cout << "You must use either the -DICOM option to specify the directory where" << endl;
50 cout << "the data is located or the -VTI or -MHA option to specify the path of a .vti file." << endl;
51 cout << endl;
52 cout << "By default, the program assumes that the file has independent components," << endl;
53 cout << "use -DependentComponents to specify that the file has dependent components." << endl;
54 cout << endl;
55 cout << "Use the -Clip option to display a cube widget for clipping the volume." << endl;
56 cout << "Use the -FrameRate option with a desired frame rate (in frames per second)" << endl;
57 cout << "which will control the interactive rendering rate." << endl;
58 cout << "Use the -DataReduction option with a reduction factor (greater than zero and" << endl;
59 cout << "less than one) to reduce the data before rendering." << endl;
60 cout << "Use one of the remaining options to specify the blend function" << endl;
61 cout << "and transfer functions. The -MIP option utilizes a maximum intensity" << endl;
62 cout << "projection method, while the others utilize compositing. The" << endl;
63 cout << "-CompositeRamp option is unshaded compositing, while the other" << endl;
64 cout << "compositing options employ shading." << endl;
65 cout << endl;
66 cout << "Note: MIP, CompositeRamp, CompositeShadeRamp, CT_Skin, CT_Bone," << endl;
67 cout << "and CT_Muscle are appropriate for DICOM data. MIP, CompositeRamp," << endl;
68 cout << "and RGB_Composite are appropriate for RGB data." << endl;
69 cout << endl;
70 cout << "Example: FixedPointVolumeRayCastMapperCT -DICOM CTNeck -MIP 4096 1024" << endl;
71 cout << endl;
72 }
73 }
74 int main(int argc, char* argv[])
75 {
76 // Parse the parameters
77
78 int count = 1;
79 char* dirname = NULL;
80 double opacityWindow = 4096;
81 double opacityLevel = 2048;
82 int blendType = 6;
83 int clip = 0;
84 double reductionFactor = 1.0;
85 double frameRate = 10.0;
86 //char* dirname = "E:\\工作\\DICOM";
87 int fileType = 0;
88
89 bool independentComponents = true;
90
91
92
93 // Create the renderer, render window and interactor
94 vtkSmartPointer<vtkNamedColors> colors =
95 vtkSmartPointer<vtkNamedColors>::New();
96 vtkSmartPointer<vtkRenderer> renderer =
97 vtkSmartPointer<vtkRenderer>::New();
98 vtkSmartPointer<vtkRenderWindow> renWin =
99 vtkSmartPointer<vtkRenderWindow>::New();
100 renWin->AddRenderer(renderer);
101
102 // Connect it all. Note that funny arithematic on the
103 // SetDesiredUpdateRate - the vtkRenderWindow divides it
104 // allocated time across all renderers, and the renderer
105 // divides it time across all props. If clip is
106 // true then there are two props
107 vtkSmartPointer<vtkRenderWindowInteractor> iren =
108 vtkSmartPointer<vtkRenderWindowInteractor>::New();
109 iren->SetRenderWindow(renWin);
110 iren->SetDesiredUpdateRate(frameRate / (1 + clip));
111
112 iren->GetInteractorStyle()->SetDefaultRenderer(renderer);
113
114 // Read the data
115 vtkSmartPointer<vtkAlgorithm> reader =
116 vtkSmartPointer<vtkAlgorithm>::New();
117 vtkSmartPointer<vtkImageData> input =
118 vtkSmartPointer<vtkImageData>::New();
119 /*if (dirname)
120 {*/
121 vtkSmartPointer<vtkDICOMImageReader> dicomReader =
122 vtkSmartPointer<vtkDICOMImageReader>::New();
123 dicomReader->SetDirectoryName("E:\\工作\\DICOM");
124 dicomReader->Update();
125 input = dicomReader->GetOutput();
126 reader = dicomReader;
127 /* }*/
128 /* else if (fileType == VTI_FILETYPE)
129 {
130 vtkSmartPointer<vtkXMLImageDataReader> xmlReader =
131 vtkSmartPointer<vtkXMLImageDataReader>::New();
132 xmlReader->SetFileName(fileName);
133 xmlReader->Update();
134 input = xmlReader->GetOutput();
135 reader = xmlReader;
136 }
137 else if (fileType == MHA_FILETYPE)
138 {
139 vtkSmartPointer<vtkMetaImageReader> metaReader =
140 vtkSmartPointer<vtkMetaImageReader>::New();
141 metaReader->SetFileName(fileName);
142 metaReader->Update();
143 input = metaReader->GetOutput();
144 reader = metaReader;
145 }
146 else
147 {
148 cout << "Error! Not VTI or MHA!" << endl;
149 exit(EXIT_FAILURE);
150 }*/
151
152 // Verify that we actually have a volume
153 int dim[3];
154 input->GetDimensions(dim);
155
156 if (dim[0] < 2 ||
157 dim[1] < 2 ||
158 dim[2] < 2)
159 {
160 cout << "Error loading data!" << endl;
161 exit(EXIT_FAILURE);
162 }
163
164 vtkSmartPointer<vtkImageResample> resample =
165 vtkSmartPointer<vtkImageResample>::New();
166 if (reductionFactor < 1.0)
167 {
168 resample->SetInputConnection(reader->GetOutputPort());
169 resample->SetAxisMagnificationFactor(0, reductionFactor);
170 resample->SetAxisMagnificationFactor(1, reductionFactor);
171 resample->SetAxisMagnificationFactor(2, reductionFactor);
172 }
173
174 // Create our volume and mapper
175 vtkSmartPointer<vtkVolume> volume =
176 vtkSmartPointer<vtkVolume>::New();
177 vtkSmartPointer<vtkFixedPointVolumeRayCastMapper> mapper =
178 vtkSmartPointer<vtkFixedPointVolumeRayCastMapper>::New();
179
180 if (reductionFactor < 1.0)
181 {
182 mapper->SetInputConnection(resample->GetOutputPort());
183 }
184 else
185 {
186 mapper->SetInputConnection(reader->GetOutputPort());
187 }
188
189
190 // Set the sample distance on the ray to be 1/2 the average spacing
191 double spacing[3];
192 if (reductionFactor < 1.0)
193 {
194 resample->GetOutput()->GetSpacing(spacing);
195 }
196 else
197 {
198 input->GetSpacing(spacing);
199 }
200
201 // mapper->SetSampleDistance( (spacing[0]+spacing[1]+spacing[2])/6.0 );
202 // mapper->SetMaximumImageSampleDistance(10.0);
203
204
205 // Create our transfer function
206 vtkSmartPointer<vtkColorTransferFunction> colorFun =
207 vtkSmartPointer<vtkColorTransferFunction>::New();
208 vtkSmartPointer<vtkPiecewiseFunction> opacityFun =
209 vtkSmartPointer<vtkPiecewiseFunction>::New();
210 // Create the property and attach the transfer functions
211 vtkSmartPointer<vtkVolumeProperty> property =
212 vtkSmartPointer<vtkVolumeProperty>::New();
213 property->SetIndependentComponents(independentComponents);
214 property->SetColor(colorFun);
215 property->SetScalarOpacity(opacityFun);
216 property->SetInterpolationTypeToLinear();
217
218 // connect up the volume to the property and the mapper
219 volume->SetProperty(property);
220 volume->SetMapper(mapper);
221
222 // Depending on the blend type selected as a command line option,
223 // adjust the transfer function
224 switch (blendType)
225 {
226 // MIP
227 // Create an opacity ramp from the window and level values.
228 // Color is white. Blending is MIP.
229 case 0:
230 colorFun->AddRGBSegment(0.0, 1.0, 1.0, 1.0, 255.0, 1.0, 1.0, 1.0);
231 opacityFun->AddSegment(opacityLevel - 0.5 * opacityWindow, 0.0,
232 opacityLevel + 0.5 * opacityWindow, 1.0);
233 mapper->SetBlendModeToMaximumIntensity();
234 break;
235
236 // CompositeRamp
237 // Create a ramp from the window and level values. Use compositing
238 // without shading. Color is a ramp from black to white.
239 case 1:
240 colorFun->AddRGBSegment(opacityLevel - 0.5 * opacityWindow, 0.0, 0.0, 0.0,
241 opacityLevel + 0.5 * opacityWindow, 1.0, 1.0, 1.0);
242 opacityFun->AddSegment(opacityLevel - 0.5 * opacityWindow, 0.0,
243 opacityLevel + 0.5 * opacityWindow, 1.0);
244 mapper->SetBlendModeToComposite();
245 property->ShadeOff();
246 break;
247
248 // CompositeShadeRamp
249 // Create a ramp from the window and level values. Use compositing
250 // with shading. Color is white.
251 case 2:
252 colorFun->AddRGBSegment(0.0, 1.0, 1.0, 1.0, 255.0, 1.0, 1.0, 1.0);
253 opacityFun->AddSegment(opacityLevel - 0.5 * opacityWindow, 0.0,
254 opacityLevel + 0.5 * opacityWindow, 1.0);
255 mapper->SetBlendModeToComposite();
256 property->ShadeOn();
257 break;
258
259 // CT_Skin
260 // Use compositing and functions set to highlight skin in CT data
261 // Not for use on RGB data
262 case 3:
263 colorFun->AddRGBPoint(-3024, 0, 0, 0, 0.5, 0.0);
264 colorFun->AddRGBPoint(-1000, .62, .36, .18, 0.5, 0.0);
265 colorFun->AddRGBPoint(-500, .88, .60, .29, 0.33, 0.45);
266 colorFun->AddRGBPoint(3071, .83, .66, 1, 0.5, 0.0);
267
268 opacityFun->AddPoint(-3024, 0, 0.5, 0.0);
269 opacityFun->AddPoint(-1000, 0, 0.5, 0.0);
270 opacityFun->AddPoint(-500, 1.0, 0.33, 0.45);
271 opacityFun->AddPoint(3071, 1.0, 0.5, 0.0);
272
273 mapper->SetBlendModeToComposite();
274 property->ShadeOn();
275 property->SetAmbient(0.1);
276 property->SetDiffuse(0.9);
277 property->SetSpecular(0.2);
278 property->SetSpecularPower(10.0);
279 property->SetScalarOpacityUnitDistance(0.8919);
280 break;
281
282 // CT_Bone
283 // Use compositing and functions set to highlight bone in CT data
284 // Not for use on RGB data
285 case 4:
286 colorFun->AddRGBPoint(-3024, 0, 0, 0, 0.5, 0.0);
287 colorFun->AddRGBPoint(-16, 0.73, 0.25, 0.30, 0.49, .61);
288 colorFun->AddRGBPoint(641, .90, .82, .56, .5, 0.0);
289 colorFun->AddRGBPoint(3071, 1, 1, 1, .5, 0.0);
290
291 opacityFun->AddPoint(-3024, 0, 0.5, 0.0);
292 opacityFun->AddPoint(-16, 0, .49, .61);
293 opacityFun->AddPoint(641, .72, .5, 0.0);
294 opacityFun->AddPoint(3071, .71, 0.5, 0.0);
295
296 mapper->SetBlendModeToComposite();
297 property->ShadeOn();
298 property->SetAmbient(0.1);
299 property->SetDiffuse(0.9);
300 property->SetSpecular(0.2);
301 property->SetSpecularPower(10.0);
302 property->SetScalarOpacityUnitDistance(0.8919);
303 break;
304
305 // CT_Muscle
306 // Use compositing and functions set to highlight muscle in CT data
307 // Not for use on RGB data
308 case 5:
309 colorFun->AddRGBPoint(-3024, 0, 0, 0, 0.5, 0.0);
310 colorFun->AddRGBPoint(-155, .55, .25, .15, 0.5, .92);
311 colorFun->AddRGBPoint(217, .88, .60, .29, 0.33, 0.45);
312 colorFun->AddRGBPoint(420, 1, .94, .95, 0.5, 0.0);
313 colorFun->AddRGBPoint(3071, .83, .66, 1, 0.5, 0.0);
314
315 opacityFun->AddPoint(-3024, 0, 0.5, 0.0);
316 opacityFun->AddPoint(-155, 0, 0.5, 0.92);
317 opacityFun->AddPoint(217, .68, 0.33, 0.45);
318 opacityFun->AddPoint(420, .83, 0.5, 0.0);
319 opacityFun->AddPoint(3071, .80, 0.5, 0.0);
320
321 mapper->SetBlendModeToComposite();
322 property->ShadeOn();
323 property->SetAmbient(0.1);
324 property->SetDiffuse(0.9);
325 property->SetSpecular(0.2);
326 property->SetSpecularPower(10.0);
327 property->SetScalarOpacityUnitDistance(0.8919);
328 break;
329
330 // RGB_Composite
331 // Use compositing and functions set to highlight red/green/blue regions
332 // in RGB data. Not for use on single component data
333 case 6:
334 opacityFun->AddPoint(0, 0.0);
335 opacityFun->AddPoint(5.0, 0.0);
336 opacityFun->AddPoint(30.0, 0.05);
337 opacityFun->AddPoint(31.0, 0.0);
338 opacityFun->AddPoint(90.0, 0.0);
339 opacityFun->AddPoint(100.0, 0.3);
340 opacityFun->AddPoint(110.0, 0.0);
341 opacityFun->AddPoint(190.0, 0.0);
342 opacityFun->AddPoint(200.0, 0.4);
343 opacityFun->AddPoint(210.0, 0.0);
344 opacityFun->AddPoint(245.0, 0.0);
345 opacityFun->AddPoint(255.0, 0.5);
346
347 mapper->SetBlendModeToComposite();
348 property->ShadeOff();
349 property->SetScalarOpacityUnitDistance(1.0);
350 break;
351 default:
352 vtkGenericWarningMacro("Unknown blend type.");
353 break;
354 }
355
356 // Set the default window size
357 renWin->SetSize(600, 600);
358 renWin->Render();
359
360 // Add the volume to the scene
361 renderer->AddVolume(volume);
362
363 renderer->ResetCamera();
364 renderer->SetBackground(colors->GetColor3d("SlateGray").GetData());
365
366 // interact with data
367 renWin->Render();
368
369 iren->Start();
370
371 return EXIT_SUCCESS;;
372 }
标签：opacityFun,AddPoint,FixedPointVolumeRayCastMapperCT,渲染,0.0,VTK,0.5,vtkSmartPoint 来源： https://www.cnblogs.com/ybqjymy/p/14239829.html