均值滤波vtkImageConvolve
#!/usr/bin/env python# -*- coding:utf-8 -*-import vtkreader = vtk.vtkJPEGReader() # 读入灰度图reader.SetFileName(r'E:\lena-gray.jpg')reader.Update()originalCastFilter = vtk.vtkImageCast() # 将图像像素类型由unsigned char转换成float数据类型originalCastFilter.SetInputConnection(reader.GetOutputPort())originalCastFilter.SetOutputScalarTypeToFloat()originalCastFilter.Update()convolveFilter = vtk.vtkImageConvolve()'''实现图像的卷积运算，需要两个输入，一个是需要进行卷积的图像，这里为vtkJPEGReader读取的图像数据另一个是卷积模板数据'''convolveFilter.SetInputConnection(originalCastFilter.GetOutputPort())kernel = [0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04]convolveFilter.SetKernel5x5(kernel) # 接收一个5*5的卷积模板数组convolveFilter.Update()convCastFilter = vtk.vtkImageCast() # 卷积运算完成后，在此将float数据转换为unsigned char数据类型进行图像显示convCastFilter.SetInputData(convolveFilter.GetOutput())convCastFilter.Update()originalActor = vtk.vtkImageActor()originalActor.SetInputData(reader.GetOutput())convolvedActor = vtk.vtkImageActor()convolvedActor.SetInputData(convCastFilter.GetOutput())leftViewport = [0.0, 0.0, 0.5, 1.0]rightViewport = [0.5, 0.0, 1.0, 1.0]originalRenderer = vtk.vtkRenderer()originalRenderer.SetViewport(leftViewport)originalRenderer.AddActor(originalActor)originalRenderer.ResetCamera()originalRenderer.SetBackground(1.0, 1.0, 1.0)convolvedRenderer = vtk.vtkRenderer()convolvedRenderer.SetViewport(rightViewport)convolvedRenderer.AddActor(convolvedActor)convolvedRenderer.ResetCamera()convolvedRenderer.SetBackground(1.0, 1.0, 1.0)renderWindow = vtk.vtkRenderWindow()renderWindow.AddRenderer(originalRenderer)renderWindow.AddRenderer(convolvedRenderer)renderWindow.Render()renderWindow.SetSize(900, 300)renderWindow.SetWindowName('MeanFilterExample')renderWindowInteractor = vtk.vtkRenderWindowInteractor()style = vtk.vtkInteractorStyleImage()renderWindowInteractor.SetInteractorStyle(style)renderWindowInteractor.SetRenderWindow(renderWindow)renderWindowInteractor.Initialize()renderWindowInteractor.Start()
高斯平滑vtkImageGaussianSmooth
#!/usr/bin/env python # -*- coding:utf-8 -*-import vtkreader = vtk.vtkJPEGReader() # 读入灰度图reader.SetFileName(r'E:\lena-gray.jpg')reader.Update()gaussianSmoothFilter = vtk.vtkImageGaussianSmooth() # 默认是执行三维高斯滤波gaussianSmoothFilter.SetInputConnection(reader.GetOutputPort())gaussianSmoothFilter.SetDimensionality(2) # 根据需要设置相应的维数gaussianSmoothFilter.SetRadiusFactor(5)# 设置高斯模板的大小，当超出该模板的范围时，系数取0gaussianSmoothFilter.SetStandardDeviation(3) # 用于设置高斯分布函数的标准差gaussianSmoothFilter.Update()originalActor = vtk.vtkImageActor()originalActor.SetInputData(reader.GetOutput())smoothedActor = vtk.vtkImageActor()smoothedActor.SetInputData(gaussianSmoothFilter.GetOutput())originalViewport = [0.0, 0.0, 0.5, 1.0]smoothedViewport = [0.5, 0.0, 1.0, 1.0]originalRenderer = vtk.vtkRenderer()originalRenderer.SetViewport(originalViewport)originalRenderer.AddActor(originalActor)originalRenderer.ResetCamera()originalRenderer.SetBackground(1.0, 1.0, 1.0)smoothedRenderer = vtk.vtkRenderer()smoothedRenderer.SetViewport(smoothedViewport)smoothedRenderer.AddActor(smoothedActor)smoothedRenderer.ResetCamera()smoothedRenderer.SetBackground(1.0, 1.0, 1.0)renderWindow = vtk.vtkRenderWindow()renderWindow.AddRenderer(originalRenderer)renderWindow.AddRenderer(smoothedRenderer)renderWindow.Render()renderWindow.SetSize(900, 300)renderWindow.SetWindowName('GaussianFilterExample')renderWindowInteractor = vtk.vtkRenderWindowInteractor()style = vtk.vtkInteractorStyleImage()renderWindowInteractor.SetInteractorStyle(style)renderWindowInteractor.SetRenderWindow(renderWindow)renderWindowInteractor.Initialize()renderWindowInteractor.Start()
中值滤波vtkImageHybridMedian2D
#!/usr/bin/env python # -*- coding:utf-8 -*-import vtkreader = vtk.vtkJPEGReader() # 读入灰度图reader.SetFileName(r'E:\lena-noise.jpg')reader.Update()hybridMedian = vtk.vtkImageHybridMedian2D() #不需要用户设置任何参数，该方法能够有效保持图像边缘，并对椒盐噪声有较好的抑制作用hybridMedian.SetInputData(reader.GetOutput())hybridMedian.Update()originalActor = vtk.vtkImageActor()originalActor.SetInputData(reader.GetOutput())hybridMedianActor = vtk.vtkImageActor()hybridMedianActor.SetInputData(hybridMedian.GetOutput())originalViewport = [0.0, 0.0, 0.5, 1.0]hybridMedianViewport = [0.5, 0.0, 1.0, 1.0]originalRenderer = vtk.vtkRenderer()originalRenderer.SetViewport(originalViewport)originalRenderer.AddActor(originalActor)originalRenderer.ResetCamera()originalRenderer.SetBackground(1.0, 1.0, 1.0)hybridMedianRenderer = vtk.vtkRenderer()hybridMedianRenderer.SetViewport(hybridMedianViewport)hybridMedianRenderer.AddActor(hybridMedianActor)hybridMedianRenderer.ResetCamera()hybridMedianRenderer.SetBackground(1.0, 1.0, 1.0)renderWindow = vtk.vtkRenderWindow()renderWindow.AddRenderer(originalRenderer)renderWindow.AddRenderer(hybridMedianRenderer)renderWindow.Render()renderWindow.SetSize(900, 300)renderWindow.SetWindowName('MedianFilterExample')renderWindowInteractor = vtk.vtkRenderWindowInteractor()style = vtk.vtkInteractorStyleImage()renderWindowInteractor.SetInteractorStyle(style)renderWindowInteractor.SetRenderWindow(renderWindow)renderWindowInteractor.Initialize()renderWindowInteractor.Start()
各向异性滤波vtkImageAnisotropicDiffusion2D
#!/usr/bin/env python # -*- coding:utf-8 -*-import vtkreader = vtk.vtkJPEGReader() # 读入灰度图reader.SetFileName(r'E:\lena-gray.jpg')reader.Update()diffusion = vtk.vtkImageAnisotropicDiffusion2D()diffusion.SetInputConnection(reader.GetOutputPort())diffusion.SetNumberOfIterations(10) # 设置迭代的次数'''各向异性扩散过滤原理是在梯度较小的像素处进行较大幅度扩散，而在大梯度处则只进行细微的扩散'''diffusion.SetDiffusionThreshold(20) # 只有当像素梯度小于该阈值20时才会进行扩散diffusion.Update()originalActor = vtk.vtkImageActor()originalActor.SetInputData(reader.GetOutput())diffusionActor = vtk.vtkImageActor()diffusionActor.SetInputData(diffusion.GetOutput())originalViewport = [0.0, 0.0, 0.5, 1.0]diffusionViewport = [0.5, 0.0, 1.0, 1.0]originalRenderer = vtk.vtkRenderer()originalRenderer.SetViewport(originalViewport)originalRenderer.AddActor(originalActor)originalRenderer.ResetCamera()originalRenderer.SetBackground(1.0, 1.0, 1.0)diffusionRenderer = vtk.vtkRenderer()diffusionRenderer.SetViewport(diffusionViewport)diffusionRenderer.AddActor(diffusionActor)diffusionRenderer.ResetCamera()diffusionRenderer.SetBackground(1.0, 1.0, 1.0)renderWindow = vtk.vtkRenderWindow()renderWindow.AddRenderer(originalRenderer)renderWindow.AddRenderer(diffusionRenderer)renderWindow.Render()renderWindow.SetSize(900, 300)renderWindow.SetWindowName('AnistropicFilteringExample')renderWindowInteractor = vtk.vtkRenderWindowInteractor()style = vtk.vtkInteractorStyleImage()renderWindowInteractor.SetInteractorStyle(style)renderWindowInteractor.SetRenderWindow(renderWindow)renderWindowInteractor.Initialize()renderWindowInteractor.Start()
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