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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">Dear <I style="mso-bidi-font-style: normal">VTKUser's</I>,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><B style="mso-bidi-font-weight: normal">Objective</B>: To write some data to a JPEG file.<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><B style="mso-bidi-font-weight: normal">Problem</B>:<SPAN style="mso-spacerun: yes"> </SPAN>The final image is black color !<o:p></o:p></FONT></FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">The code is as follows:<o:p></o:p></FONT></FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">// *****<SPAN style="mso-spacerun: yes"> </SPAN>Used to read 16 bit Image<SPAN style="mso-spacerun: yes"> </SPAN>*****<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: blue"><FONT size=3><FONT face="Times New Roman">vtkVolume16Reader *v16Img = vtkVolume16Reader::New();<SPAN style="mso-spacerun: yes"> </SPAN><o:p></o:p></FONT></FONT></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetDataDimensions (sizex,sizey);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetImageRange<SPAN style="mso-spacerun: yes"> </SPAN>(atoi(argv[3]),atoi(argv[4]));<FONT color=#407f00>//Specify the number of slices to read<o:p></o:p></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetHeaderSize(HeadS); <FONT color=#407f00>// Specify the number of bytes to seek over at start of image<o:p></o:p></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetFilePrefix (argv[2]);<SPAN style="mso-tab-count: 1"> <FONT color=#407f00> </FONT></SPAN><FONT color=#407f00>//Specify the File prefix of all the slices (files)<o:p></o:p></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetDataSpacing (0.1, 0.1, 0.5); <SPAN style="mso-tab-count: 3"> <FONT color=#407f00> </FONT></SPAN><FONT color=#407f00>//Resolution along X, Y and Z axis<o:p></o:p></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>v16Img->SetDataOrigin(0, 0, 0);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">// *****<SPAN style="mso-spacerun: yes"> </SPAN>Extracting a slice from the 3D volume<SPAN style="mso-spacerun: yes"> </SPAN>*****<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: blue"><FONT size=3><FONT face="Times New Roman">vtkImageReslice *imgResliceIn = vtkImageReslice::New();<SPAN style="mso-tab-count: 1"> </SPAN><o:p></o:p></FONT></FONT></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgResliceIn->SetInput(v16Img -> GetOutput());<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgResliceIn->SetOutputSpacing(1,1,1);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgResliceIn->SetInterpolationModeToLinear();<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgResliceIn->SetOutputOrigin(0, 0, 10);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgResliceIn->SetOutputExtent(0,312,0,499,0,0);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1"> </SPAN><o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">// *****<SPAN style="mso-spacerun: yes"> </SPAN>Scaling the pixel range<SPAN style="mso-spacerun: yes"> </SPAN>******<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: blue"><FONT size=3><FONT face="Times New Roman">vtkImageShiftScale *imgShSc =vtkImageShiftScale::New();<o:p></o:p></FONT></FONT></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgShSc->SetInput(imgResliceIn -> GetOutput());<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgShSc->SetScale(256/13000);<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><FONT color=#407f00><EM>// $$ The input image pixel range is from 0 to 13000.<o:p></o:p></EM></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><FONT color=#407f00><EM>// $$ I wanted to convert the range from (0-13000)<o:p></o:p></EM></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><FONT color=#407f00><EM>// $$ to (0-255).<o:p></o:p></EM></FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1"> </SPAN><o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">// ***** Converting to Unsigned Char for JPEG writer *<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: blue"><FONT size=3><FONT face="Times New Roman">vtkImageCast *imgCastIn = vtkImageCast::New();<o:p></o:p></FONT></FONT></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgCastIn->SetInput(imgShSc -> GetOutput());<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>imgCastIn->SetOutputScalarTypeToUnsignedChar();<SPAN style="mso-tab-count: 1"> </SPAN><o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1"> </SPAN><o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="COLOR: #ff6600"><FONT size=3><FONT face="Times New Roman">vtkJPEGWriter *jpegWrIn = vtkJPEGWriter::New();<o:p></o:p></FONT></FONT></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>jpegWrIn->SetInput(imgCastIn -> GetOutput());<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>jpegWrIn->SetFileName("Input10.jpg");<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>jpegWrIn->Write();<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">//****************************************************<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">Thank you,<o:p></o:p></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">Ravi</st1:place>.</FONT></FONT></P></DIV><p>
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