<div dir="ltr">Hi Vtkusers,<div><br></div><div>  I found a bug in vtkImageMapToColors. It does not output with input spacing and origin. It sets the spacing to [1,1,1] and origin to [0,0,0]. I am using VTK 6.2 but I believe it happens also in VTK 7.0. Can you fix this? Here is a test program and a sample image (input.mha) and its output(input-colormap.mha):</div><div><br></div><div>   <span class="" style="white-space:pre">        </span>vtkSmartPointer<vtkMetaImageReader> inputReader = vtkSmartPointer<vtkMetaImageReader>::New();</div><div><span class="" style="white-space:pre">  </span>inputReader->SetFileName(argv[1]);</div><div><span class="" style="white-space:pre">      </span>try</div><div><span class="" style="white-space:pre">        </span>{</div><div><span class="" style="white-space:pre">          </span>inputReader->Update();</div><div><span class="" style="white-space:pre">  </span>}</div><div><span class="" style="white-space:pre">  </span>catch(...)</div><div><span class="" style="white-space:pre"> </span>{</div><div><span class="" style="white-space:pre">          </span>std::cerr << "Error occurs when reading " << argv[1] << std::endl;</div><div><span class="" style="white-space:pre">             </span>return EXIT_FAILURE;</div><div><span class="" style="white-space:pre">       </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>vtkSmartPointer<vtkLookupTable> lookupTable = vtkSmartPointer<vtkLookupTable>::New();</div><div><span class="" style="white-space:pre">  </span>lookupTable->SetTableRange(0.0, 255.0);</div><div><span class="" style="white-space:pre"> </span>lookupTable->SetNumberOfTableValues(256);</div><div><span class="" style="white-space:pre">       </span>lookupTable->SetTableValue(0, 0.0, 0.0, 0.0, 0.0);</div><div><span class="" style="white-space:pre">      </span>for(vtkIdType i=1; i<256; i++)</div><div><span class="" style="white-space:pre">          </span>lookupTable->SetTableValue(i, 1.0, 0.0, 0.0, 0.4);</div><div><span class="" style="white-space:pre">      </span>lookupTable->Build();</div><div><span class="" style="white-space:pre">   </span>vtkSmartPointer<vtkImageMapToColors> imageColor = vtkSmartPointer<vtkImageMapToColors>::New();</div><div><span class="" style="white-space:pre"> </span>imageColor->SetInputConnection(inputReader->GetOutputPort());</div><div><span class="" style="white-space:pre">        </span>imageColor->SetOutputFormatToRGBA();</div><div><span class="" style="white-space:pre">    </span>imageColor->SetLookupTable(lookupTable);</div><div><br></div><div><span class="" style="white-space:pre">       </span>vtkSmartPointer< vtkMetaImageWriter > writer = vtkSmartPointer< vtkMetaImageWriter >::New();</div><div><span class="" style="white-space:pre">   </span>writer->SetFileName(argv[2]);</div><div><span class="" style="white-space:pre">   </span>writer->SetInputConnection(imageColor->GetOutputPort());</div><div><span class="" style="white-space:pre">     </span>try</div><div><span class="" style="white-space:pre">        </span>{</div><div><span class="" style="white-space:pre">          </span>writer->Write();</div><div><span class="" style="white-space:pre">        </span>}</div><div><span class="" style="white-space:pre">  </span>catch(...)</div><div><span class="" style="white-space:pre"> </span>{</div><div><span class="" style="white-space:pre">          </span>std::cerr << "Error occurs when writing " << argv[2] << std::endl;</div><div><span class="" style="white-space:pre">             </span>return EXIT_FAILURE;</div><div><span class="" style="white-space:pre">       </span>}</div><div><br></div><div>Thanks,</div><div>Mengda</div></div>