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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>Hello all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>I am new to itk and tried to write my first program using itk and vtk to show an image, but I encountered a strange problem. It seems that my itk can¡¯t infer from the file extension which ImageIO to use. If I commented the phrase <o:p></o:p></span></p><p class=MsoNormal style='text-indent:21.0pt'><span lang=EN-US style='font-size:10.5pt;font-family:NSimSun;color:green'>reader->SetImageIO(itk::JPEGImageIO::New());<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>out, the error <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-family:"Calibri","sans-serif"'> ¡°</span><span lang=EN-US style='font-size:10.5pt;font-family:NSimSun'>Could not create IO object for file E:\1340858885.jpg<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.5pt;font-family:NSimSun'> Tried to create one of the following:<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.5pt;font-family:NSimSun'> You probably failed to set a file suffix, or<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.5pt;font-family:NSimSun'> set the suffix to an unsupported type.¡±<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>occurred, but the program worked properly with the phrase mentioned above. See my source code attached at the end of this mail.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'> Is there someone can tell me why this happened?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>Thanks a lot in advance!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Calibri","sans-serif"'>Wu, Pengfei<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Code:<o:p></o:p></span></p><div class=MsoNormal align=center style='text-align:center;text-autospace:none'><span lang=EN-US style='font-size:14.0pt;font-family:"Calibri","sans-serif"'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun;color:blue'>int</span><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>main</span>(<span style='color:blue'>int</span> <span style='color:#010001'>argc</span>, <span style='color:blue'>char</span>* <span style='color:#010001'>argv</span>[])<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'>{<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>typedef</span> <span style='color:#010001'>itk</span>::<span style='color:#010001'>RGBPixel</span><<span style='color:blue'>unsigned</span> <span style='color:blue'>short</span>> <span style='color:#010001'>PixelType</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>const</span> <span style='color:blue'>unsigned</span> <span style='color:blue'>int</span> <span style='color:#010001'>Dimension</span> = 2;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>typedef</span> <span style='color:#010001'>itk</span>::<span style='color:#010001'>Image</span><<span style='color:#010001'>PixelType</span>, <span style='color:#010001'>Dimension</span>> <span style='color:#010001'>ImageType</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>typedef</span> <span style='color:#010001'>itk</span>::<span style='color:#010001'>ImageFileReader</span><<span style='color:#010001'>ImageType</span>> <span style='color:#010001'>ReaderType</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>ReaderType</span>::<span style='color:#010001'>Pointer</span> <span style='color:#010001'>reader</span> = <span style='color:#010001'>ReaderType</span>::<span style='color:#010001'>New</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>const</span> <span style='color:blue'>char</span> *<span style='color:#010001'>filename</span> = <span style='color:#A31515'>"E:\\1340858885.jpg"</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:green'>//reader->SetImageIO(itk::JPEGImageIO::New());</span><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>reader</span>-><span style='color:#010001'>SetFileName</span>(<span style='color:#010001'>filename</span>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>ImageType</span>::<span style='color:#010001'>Pointer</span> <span style='color:#010001'>image</span> = <span style='color:#010001'>reader</span>-><span style='color:#010001'>GetOutput</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun;color:green'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>typedef</span> <span style='color:#010001'>itk</span>::<span style='color:#010001'>ImageToVTKImageFilter</span><<span style='color:#010001'>ImageType</span>> <span style='color:#010001'>FilterType</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>FilterType</span>::<span style='color:#010001'>Pointer</span> <span style='color:#010001'>connecter</span> = <span style='color:#010001'>FilterType</span>::<span style='color:#010001'>New</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>connecter</span>-><span style='color:#010001'>SetInput</span>(<span style='color:#010001'>image</span>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>vtkImageViewer</span> *<span style='color:#010001'>viewer</span> = <span style='color:#010001'>vtkImageViewer</span>::<span style='color:#010001'>New</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>vtkRenderWindowInteractor</span> *<span style='color:#010001'>renderWindowInteractor</span> = <span style='color:#010001'>vtkRenderWindowInteractor</span>::<span style='color:#010001'>New</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>viewer</span>-><span style='color:#010001'>SetupInteractor</span>(<span style='color:#010001'>renderWindowInteractor</span>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>viewer</span>-><span style='color:#010001'>SetInput</span>(<span style='color:#010001'>connecter</span>-><span style='color:#010001'>GetOutput</span>());<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>viewer</span>-><span style='color:#010001'>Render</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>viewer</span>-><span style='color:#010001'>SetColorWindow</span>(255);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>viewer</span>-><span style='color:#010001'>SetColorLevel</span>(128);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>renderWindowInteractor</span>-><span style='color:#010001'>Start</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:#010001'>cin</span>.<span style='color:#010001'>get</span>();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'> <span style='color:blue'>return</span> 0;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:11.0pt;font-family:NSimSun'>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>-------------------------------------End of Code-------------------------------------------------------------<o:p></o:p></span></p></div></body></html>