[Insight-developers] MultiScaleHessianBasedMeasureImageFilter in Review...

[Kevin H. Hobbs]

Luca Antiga wrote:
>
> 2) agreed, feel free to switch to the Buffered region.

It's been a while since I looked at the paper and code,
the filter did not stream at the time so I played with its constituent 
parts,
I used ExtractImageFilter to force piece by piece updates,
but I believe there are two problems that prevent this filter from 
streaming.

1. It uses IIR filters so every pixel in the image has some impact on 
the output.
    FIR filters are slow for the large kernels associated with the 
larger sigmas.
    This can be overcome with some small error by enlarging streamed 
pieces by a
    sigma or two and using the IIR filters.

2. It normalizes the image for each scale before combining them.
    When streaming this results in each piece being scaled and the whole 
image
    becomes blocks of very different intensities.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 259 bytes
Desc: OpenPGP digital signature
URL: <http://www.itk.org/mailman/private/insight-developers/attachments/20090312/ddb36d6e/attachment.pgp>