[Insight-users] Cuberille

[Mário Costa]

Hi Dan

Due the explanation you gave me I´ve understood that with Cuberille 
filter I can only compare qualitativelythe images, isn´t it?
Now I´ve already changed the other parameters to compare the results of 
the images. If you want to see some of the results I can post some of 
the images I´ve had. In total I´ve 60 images to analyse and comment.
The values that you chose to the other parameters 
(SurfaceDistanceThreshold, StepLength, StepLengthRelax, 
MaximumNumberOfSteps) are the best values for the images with the 
extension .mha, or are them good for other kind of images? And why have 
you choose them?

Thanks for the links and the explanation.

Em 07-06-2011 10:46, Dan Mueller escreveu:
> Hi Mário,
>
> (This time cc'd to the insight-users mailing list)
>
>> I´m trying to understand the diference of using GenerateTriangleFaces or
>> ProjectVerticesToIsoSurface.
> These parameters are described in the Insight journal article:
>     http://www.insight-journal.org/download/viewpdf/740/3
>
> "GenerateTriangleFaces specifies whether triangle or quadrilateral
> faces should be generated. The default is to generate triangle faces."
> GenerateTriangleFaces=true means that the algorithm generates
> triangles, GenerateTriangleFaces=false means the algorithm generates
> quadrilaterals (e.g. rectangles).
>
> "ProjectVerticesToIsoSurface specifies whether the vertices should be
> projected onto the iso-surface. If the projection is disabled, the
> resultant mesh exhibits the traditional blocky features. Projection
> takes roughly half of the algorithm time. The default is to project
> the vertices."
> ProjectVerticesToIsoSurface=true means that the resultant mesh is
> smooth (vertices are projected onto the surface).
> ProjectVerticesToIsoSurface=false means that the resultant mesh is
> blocky (vertices are not projected and remain block-like).
>
>> Can you send me the articles you mention in the references of the article
>> "Cuberille implicit surface polygonization for itk"?
> Unfortunately the referenced publications did not follow the
> principles of open science, and are behind a pay wall. The best I can
> do is send you the digital object identifier links. If you are
> studying, your university typically pays exorbitant fees to access
> these publications. Ask your librarian.
>     http://dx.doi.org/10.1016/0734-189X(89)90132-1
>     http://dx.doi.org/10.1016/0146-664X(79)90079-0
>
> HTH
>
> Cheers, Dan
>
>> 2011/6/6 Mário Costa<mario.costa.13 at gmail.com>:
>>> Hi Dan
>>>
>>> I´m studying the algorithm Cuberille in school, and I have to make a report
>>> of it.
>>> I´ve read your article, and I´m using your code to read the volume of vtk
>>> images and get the respective polygon meshes.
>>> I needed to change all the parameters of the algorithm in order to discuss
>>> which values were the best for certain kind of images.
>>> Now I don´t know what to compare from the original image and the respective
>>> mesh.
>>> I´m trying to understand the diference of using GenerateTriangleFaces or
>>> ProjectVerticesToIsoSurface.
>>> Can you send me the articles you mention in the references of the article
>>> "Cuberille implicit surface polygonization for itk"?
>>>
>>>
>>> Em 05-06-2011 14:22, Dan Mueller escreveu:
>>>> Hi Mario,
>>>>
>>>> Are you referring to the Cuberille implicit surface polygonization
>>>> algorithm?
>>>>     http://www.insight-journal.org/browse/publication/740
>>>>
>>>> If so, this algorithm takes a 3-d image (volume) and converts it to a
>>>> polygon mesh.
>>>>
>>>> Please post your source code, input images, and output screen captures
>>>> to the list so we can provide more detailed help.
>>>> (You may have to post these files/images to an online file repository,
>>>> as the mailing list only supports text and very small images).
>>>>
>>>> Cheers, Dan
>>>>
>>>> 2011/6/1 Mário Costa<mario.costa.13 at gmail.com>:
>>>>> Hello
>>>>>
>>>>>
>>>>> I´m studying the Cuberille algorithm. I've implemented it and tried to
>>>>> run
>>>>> it with several images but I can´t understand all the results i´ve had.
>>>>> Can someone tell me what are the main applications of this algorithm?
>>>>>
>>>>> Thanks
>>>>> Mario Costa
>>>


-- 
Cumprimentos
Mário Costa

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