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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am using Windows 7 x64 with Activiz 5.8 Visual Studio 2008.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am attempting to scan an image and replace a specific pixel value with another. To do this I thought I would try to override vtkSimpleImageToImageFilter. I looked at the C++ code for vtkSimpleImageFilterExample and came up with the following:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>public</span> <span style='color:blue'>class</span> <span style='color:#2B91AF'>ReplacePixel</span> : <span style='color:#2B91AF'>vtkSimpleImageToImageFilter<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>private</span> <span style='color:blue'>ushort</span> _pixelValue;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>public</span> <span style='color:blue'>void</span> SimpleExecute(<span style='color:#2B91AF'>vtkImageData</span> input, <span style='color:#2B91AF'>vtkImageData</span> output)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:#2B91AF'>Console</span>.WriteLine(<span style='color:#A31515'>"input type = {0} output type = {1} Dimensions ({2},{3},{4}) Pixel={5}"</span>,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> input.GetScalarTypeAsString(), output.GetScalarTypeAsString(),<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> input.GetDimensions()[0], input.GetDimensions()[1], input.GetDimensions()[2],<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> PixelValue);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>public</span> <span style='color:blue'>ushort</span> PixelValue<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>get<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>return</span> _pixelValue;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>set<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> _pixelValue = <span style='color:blue'>value</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal>When I attempt to compile VS gives the following error:<o:p></o:p></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>error CS1729: 'Kitware.VTK.vtkSimpleImageToImageFilter' does not contain a constructor that takes '0' arguments<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal>The error persists if I define a simple zero argument constructor for ReplacePixel.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am instantiating Replace pixel like this:<o:p></o:p></p><p class=MsoNormal style='text-indent:.5in;text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:#2B91AF'>ReplacePixel</span><span style='font-size:10.0pt;font-family:"Courier New"'> removeValue = (<span style='color:#2B91AF'>ReplacePixel</span>)<span style='color:#2B91AF'>ReplacePixel</span>.New();<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I couldn’t find any examples for creating my own filter in Activiz. Pointers would be appreciated. Worst case, is there a better way to iterate through all of the pixels in a vtkImageData without using filters? I’m guessing it somehow involves GetScalarPointer.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> -- Scott<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>