[Rtk-users] I0EstimationProjectionFilter

[Simon Rit]

Hi Lotte,
This code has only be used for unsigned short. I guess you should replace
all "unsigned short" in the two code files by InputImagePixelType which is
already defined in the header. I would also advise a code review, for
example 16 line 33 of rtkI0EstimationProjectionFilter.hxx should be replace
by std::numeric_limits
<http://en.cppreference.com/w/cpp/types/numeric_limits><InputImagePixelType>
::digits.
I0EstimationProjectionFilter is based on a histogram analysis. Using 2^16
bins for unsigned shorts or 2^32 for unsigned int is too large so bitShift
is used to reduce the number of bins to, e.g., for unsigned shorts,
2^(16-bitShift) bins.
If you can't figure it out, let us know. If you do, please share your dev!
Thanks,
Simon

On Fri, Mar 3, 2017 at 2:39 PM, Lotte Schyns <lotte.schyns at maastro.nl>
wrote:

> Hello,
>
> I would like to set the maximum pixel value in
> rtk::I0EstimationProjectionFilter to (2^32)-1 since I have (unsigned)
> pixels of 4 bytes each. However, the input for SetMaxPixelValue requires
> an unsigned short, so I can only set a maximum value of (2^16)-1, which
> is not enough. Is there a possible solution/workaround for this? Could
> you also tell me what the bitShift represents in
> rtk::I0EstimationProjectionFilter? Thanks in advance.
>
> Lotte
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