[vtkusers] [Insight-users] how to convert the pixeltype of a image

[Bill Lorensen]

Please provide a short compilable example that illustrates the problem.

On Mon, Sep 2, 2013 at 11:19 PM, shiwei <swingsw89 at 163.com> wrote:
> Yes, I know that ,what I'm trying to do is to read some tiff images ,but
> after reading it ,we need to use double type to process the images because
> the uchar or ushort type's accuracy is not enough, That's what I'm trying
> to. I know I can't read a float or double TIFF image, however, I'm trying to
> convert it to double after I have read them. Thanks for your help then!
>
>
>
>
>
>
> At 2013-09-03 11:04:37,"Bill Lorensen" <bill.lorensen at gmail.com> wrote:
>>You cannot write a float TIFF. Is that what you are trying?
>>
>>
>>On Mon, Sep 2, 2013 at 9:35 PM, shiwei <swingsw89 at 163.com> wrote:
>>> Tanks for your answer!However when I did what you have told, it still
>>> have
>>> some problem below:
>>>
>>> itk::ExceptionObject<0031e508>
>>>
>>> Description:itk::Error:TIFFimageIO:TIFF supports unsigned/signed
>>> char,unsigned short/signed short only.
>>>
>>> As I said before, I want to use some tiff images ,however  TIFF support
>>> unsigned/signed char,unsigned short/signed short only, so I'm still
>>> asking
>>> if there is a way to convert the uchar or ushort type to double for
>>> delica
>>> use? Thank you!
>>>
>>>
>>>
>>> At 2013-09-02 20:09:33,"Bill Lorensen" <bill.lorensen at gmail.com> wrote:
>>>>When you define your read, just template it over the image type you
>>>>want the reader to produce.
>>>>typedef itk::Image< double, 2 >         ImageType;
>>>>typedef itk::ImageFileReader<ImageType> ReaderType;
>>>>ReaderType::Pointer reader = ReaderType::New();
>>>>
>>>>
>>>>On Sun, Sep 1, 2013 at 10:41 PM, shiwei <swingsw89 at 163.com> wrote:
>>>>> Hi, When I was dealing with some tiff images, it only have two kinds of
>>>>> pixeltype to choose: char and short. However,I need to convert the
>>>>> pixeltype
>>>>> to double for delica use, I'm wondering whether ITK has a way to
>>>>> convert
>>>>> the
>>>>> pixeltype to double? Thank you!
>>>>>
>>>>>
>>>>>
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>>>>
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>>>
>>
>>
>>
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>
>
>



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