vtk使用包围盒vtkBoxWidget交互式裁剪dicom图像
时间: 2023-10-04 07:07:40 浏览: 115
使用VTK的vtkBoxWidget可以实现交互式裁剪DICOM图像。下面是一个简单的示例代码:
```python
import vtk
# 读取DICOM数据
reader = vtk.vtkDICOMImageReader()
reader.SetDirectoryName("path/to/dicom/files")
reader.Update()
# 创建渲染器和交互器
renderer = vtk.vtkRenderer()
renderWindow = vtk.vtkRenderWindow()
renderWindow.AddRenderer(renderer)
renderWindowInteractor = vtk.vtkRenderWindowInteractor()
renderWindowInteractor.SetRenderWindow(renderWindow)
# 创建BoxWidget并添加到渲染器中
boxWidget = vtk.vtkBoxWidget()
boxWidget.SetInteractor(renderWindowInteractor)
boxWidget.SetPlaceFactor(1.0)
boxWidget.PlaceWidget()
boxWidget.InsideOutOn()
boxWidget.AddObserver("InteractionEvent", lambda obj, event: updateClippingBox(obj, renderer))
boxWidget.SetInputData(reader.GetOutput())
boxWidget.PlaceWidget()
# 设置相机位置和方向
camera = renderer.GetActiveCamera()
camera.SetPosition(-500, -500, 500)
camera.SetFocalPoint(0, 0, 0)
camera.SetViewUp(0, 0, 1)
renderer.ResetCamera()
# 更新裁剪框
def updateClippingBox(obj, renderer):
box = vtk.vtkBoxRepresentation().SafeDownCast(obj.GetRepresentation())
if box:
box.GetTransform(obj.GetProp3D().GetMatrix())
clip = vtk.vtkImageClip()
clip.SetInputData(reader.GetOutput())
clip.SetOutputWholeExtent(box.GetBounds())
clip.ClipDataOn()
clip.Update()
actor = vtk.vtkImageActor()
actor.GetMapper().SetInputData(clip.GetOutput())
renderer.RemoveAllViewProps()
renderer.AddActor(actor)
renderWindow.Render()
# 开始渲染
renderWindow.Render()
renderWindowInteractor.Start()
```
该代码创建了一个vtkDICOMImageReader,读取DICOM数据,并将其传递给vtkBoxWidget。然后,使用vtkImageClip来裁剪DICOM数据,并通过vtkImageActor将结果添加到渲染器中。最后,使用vtkRenderWindowInteractor启动交互式窗口并开始渲染。