这篇文章主要介绍“怎么使用Python VTK完成图像切割”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“怎么使用Python VTK完成图像切割”文章能帮助大家解决问题。
1、读取二维图片序列完成面绘制
详情见Python-VTK批量读取二维切片并显示三维模型
2、vtk.vtkOutlineFilter()介绍
这个空间就相当于生成渲染模型的轮廓线，比如三维图像大小为（256x256x200），那么这个控件就会生成一个长宽高分别为256x256x200的一个长方体框架
详细介绍：VTK官方文档
3、隐函数平面模块vtk.vtkImplicitPlaneWidget()
使用该模块可以灵活的调整需要选取的平面 vtkImplicitPlaneWidget官方文档
4、vtk.vtkClipPolyData()
vtkclippolydata的剪切结果，根据切平面法线分为上下两部分，接口中有相应的输出接口
vtkClipPolyData官方文档
切割效果展示
代码如下:
import vtkdef main(): arender = vtk.vtkRenderer() arender.SetViewport(0, 0.0, 0.5, 1.0) renWin = vtk.vtkRenderWindow() renWin.AddRenderer(arender) iren = vtk.vtkRenderWindowInteractor() iren.SetRenderWindow(renWin) # Reader = vtk.vtkMetaImageReader() # Reader.SetFileName("bbb.mhd") # Reader.Update()#读取图片、面绘制 Reader = vtk.vtkPNGReader() Reader.SetNumberOfScalarComponents(1) Reader.GetOutput().GetOrigin() Reader.SetDataByteOrderToLittleEndian() Reader.SetFileDimensionality(3) Reader.SetDataExtent(0, 512, 0, 512,0, 226) Reader.SetFilePrefix("E:/qct_data/in_out_data/in_data/inner/label/22/") #Reader.SetFilePrefix("C:/Users/deng5/Desktop/2/48/") Reader.SetFilePattern("%s%d.png") Reader.SetDataSpacing(1, 1, 1) # Volume Pixel Reader.Update() #面绘制代码，详情见使用python-vtk完成面绘制文章 skinExtractor = vtk.vtkContourFilter() skinExtractor.SetInputConnection(Reader.GetOutputPort()) skinExtractor.SetValue(0, 1) skinExtractor.ComputeGradientsOn(); skinExtractor.ComputeScalarsOn(); smooth = vtk.vtkSmoothPolyDataFilter() smooth.SetInputConnection(skinExtractor.GetOutputPort()) smooth.SetNumberOfIterations(100) skinNormals = vtk.vtkPolyDataNormals() skinNormals.SetInputConnection(smooth.GetOutputPort()) skinNormals.SetFeatureAngle(50) skinStripper = vtk.vtkStripper() skinStripper.SetInputConnection(skinNormals.GetOutputPort()) skinMapper = vtk.vtkPolyDataMapper() skinMapper.SetInputConnection(skinStripper.GetOutputPort()) skinMapper.ScalarVisibilityOff() skin = vtk.vtkActor() skin.SetMapper(skinMapper)#定义一个图像边界控件 outlineData = vtk.vtkOutlineFilter() outlineData.SetInputConnection(Reader.GetOutputPort()) mapOutline = vtk.vtkPolyDataMapper() mapOutline.SetInputConnection(outlineData.GetOutputPort()) outline = vtk.vtkActor() outline.SetMapper(mapOutline) outline.GetProperty().SetColor(0, 0, 0) aCamera = vtk.vtkCamera() aCamera.SetViewUp(0, 0, -1) aCamera.SetPosition(0, 1, 0) aCamera.ComputeViewPlaneNormal() aCamera.Azimuth(30.0) aCamera.Elevation(30.0) aCamera.Dolly(1.5) arender.AddActor(outline) arender.AddActor(skin) #splineActor.GetProperty().SetLineWidth(5) #arender.AddActor(splineActor) #arender.AddActor(pointActor) arender.SetActiveCamera(aCamera) arender.ResetCamera() arender.SetBackground(.2, .3, .4) arender.ResetCameraClippingRange() renWin.SetSize(1000, 1000) style = vtk.vtkInteractorStyleTrackballCamera() iren.SetInteractorStyle(style);#定义切割器 global cliper cliper = vtk.vtkClipPolyData() cliper.SetInputData(skinStripper.GetOutput())#定义平面隐函数 implicitPlaneWidget = vtk.vtkImplicitPlaneWidget() implicitPlaneWidget.SetInteractor(iren) implicitPlaneWidget.SetPlaceFactor(1.25) implicitPlaneWidget.SetInputData(skinStripper.GetOutput()) implicitPlaneWidget.PlaceWidget() global coneSkinActor coneSkinActor = vtk.vtkActor() coneSkinActor.SetMapper(skinMapper) rRenderer = vtk.vtkRenderer() rRenderer.SetBackground(0.2, 0.3, 0.5) rRenderer.SetViewport(0.5, 0.0, 1.0, 1.0) coneSkinActor.RotateZ(90) rRenderer.AddActor(coneSkinActor) renWin.AddRenderer(rRenderer) #关联CallBack函数 implicitPlaneWidget.AddObserver("EndInteractionEvent", my_call_back) implicitPlaneWidget.On() renWin.Render() iren.Initialize() iren.Start()#CallBack函数def my_call_back(pWidget,ev):#表示当pWidget控件改变时，触发函数 if (pWidget): print(pWidget.GetClassName(), "Event Id:", ev) planeNew = vtk.vtkPlane() #获得pWidget中的平面，将平面值赋值planeNew pWidget.GetPlane(planeNew) #cliper将裁剪器cliper的平面设置为planeNew cliper.SetClipFunction(planeNew) planeNew.GetNormal() cliper.Update(); #将裁减后的模型传递给另一个窗口 clipedData = vtk.vtkPolyData() clipedData.DeepCopy(cliper.GetOutput()) coneMapper = vtk.vtkPolyDataMapper() coneMapper.SetInputData(clipedData) coneMapper.ScalarVisibilityOff() coneSkinActor.SetMapper(coneMapper) print("Plane Normal = "+str(planeNew.GetNormal())) print("Plane Origin = "+str(planeNew.GetOrigin())) main()关于“怎么使用Python VTK完成图像切割”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识，可以关注编程网行业资讯频道，小编每天都会为大家更新不同的知识点。
