[vtkusers] Writing Image Slices with unsigned short data type

[HIRAKI Hideaki]

At Sat 28 Oct 2000 13:33:19 +0200, Sebastien BARRE wrote:
>At 28/10/00 06:07, Asad A. Abu-Tarif wrote:
>
>>Is there any Image writer that takes vtkStructuredPoints as its input and 
>>writes the image slices to standart image format(s)? I found vtkBMPWriter 
>>and vtkTIFFWriter, however, these deal only with unsigned char input type. 
>>My data is 2 bytes long (unsigned short) and hence I need some other image 
>>writer.
>
>BMP won't support unsigned short anyway.
>The TIFF format does, theoritically. I do remember that the TIFF reader is 
>able to read 16 bits data, si I guess the writer does the same. Try this 
>out, and test the result with Photoshop for example (which is able to 
>handle 16 bits).

As vtkTIFFWriter didn't support 16 bits data, I made vtkTIFF16Writer 
tweaking vtkTIFFWriter. The modifications are shown below. I hope 
this helps.


% diff imaging/vtkTIFFWriter.h local/vtkTIFF16Writer.h
42c42
< // .NAME vtkTIFFWriter - write out structured points as a TIFF file
---
> // .NAME vtkTIFF16Writer - write out structured points as a TIFF file
46,47c46,47
< #ifndef __vtkTIFFWriter_h
< #define __vtkTIFFWriter_h
---
> #ifndef __vtkTIFF16Writer_h
> #define __vtkTIFF16Writer_h
52c52
< class VTK_EXPORT vtkTIFFWriter : public vtkImageWriter
---
> class VTK_EXPORT vtkTIFF16Writer : public vtkImageWriter
55,56c55,56
<   static vtkTIFFWriter *New();
<   vtkTypeMacro(vtkTIFFWriter,vtkImageWriter);
---
>   static vtkTIFF16Writer *New();
>   vtkTypeMacro(vtkTIFF16Writer,vtkImageWriter);
59,62c59,62
<   vtkTIFFWriter() {};
<   ~vtkTIFFWriter() {};
<   vtkTIFFWriter(const vtkTIFFWriter&) {};
<   void operator=(const vtkTIFFWriter&) {};
---
>   vtkTIFF16Writer() {};
>   ~vtkTIFF16Writer() {};
>   vtkTIFF16Writer(const vtkTIFF16Writer&) {};
>   void operator=(const vtkTIFF16Writer&) {};


% diff imaging/vtkTIFFWriter.cxx local/vtkTIFF16Writer.cxx
42c42
< #include "vtkTIFFWriter.h"
---
> #include "vtkTIFF16Writer.h"
55c55
< vtkTIFFWriter* vtkTIFFWriter::New()
---
> vtkTIFF16Writer* vtkTIFF16Writer::New()
58c58
<   vtkObject* ret = vtkObjectFactory::CreateInstance("vtkTIFFWriter");
---
>   vtkObject* ret = vtkObjectFactory::CreateInstance("vtkTIFF16Writer");
61c61
<     return (vtkTIFFWriter*)ret;
---
>     return (vtkTIFF16Writer*)ret;
66c66
<     vtkGenericWarningMacro ("vtkTIFFWriter expects sizeof(vtkTiffLong) to be 4,"
---
>     vtkGenericWarningMacro ("vtkTIFF16Writer expects sizeof(vtkTiffLong) to be 4,"
70c76
<   return new vtkTIFFWriter;
---
>   return new vtkTIFF16Writer;
285c291
< void vtkTIFFWriter::WriteFileHeader(ofstream *file, vtkImageData *cache)
---
> void vtkTIFF16Writer::WriteFileHeader(ofstream *file, vtkImageData *cache)
357c363
<       short depth = 8;
---
>       short depth = 16;
362c368
<       vtkTiffUnsignedLong depth = 8 + (8 << 16);
---
>       vtkTiffUnsignedLong depth = 16 + (16 << 16);
421c427
<   vtkTiffLong stripByteCounts = width*height*bpp;
---
>   vtkTiffLong stripByteCounts = width*height*bpp*2;
469c475
<   short depth = 8;
---
>   short depth = 16;
483c489
< void vtkTIFFWriter::WriteFile(ofstream *file, vtkImageData *data,
---
> void vtkTIFF16Writer::WriteFile(ofstream *file, vtkImageData *data,
500,501c506,507
<     case VTK_UNSIGNED_CHAR:
<       rowLength = sizeof(unsigned char); 
---
>     case VTK_UNSIGNED_SHORT:
>       rowLength = sizeof(unsigned short); 
504c510
<       vtkErrorMacro("TIFFWriter only accepts unsigned char scalars!");
---
>       vtkErrorMacro("TIFF16Writer only accepts unsigned short scalars!");