[Insight-users] Still struggling with extracting information about objects resulting from a segmentation

[Neal R. Harvey]

Gaëtan Lehmann wrote:
>
> Le 11 mars 10 à 22:10, Neal R. Harvey a écrit :
>
>> Gaëtan Lehmann wrote:
>>>
>>> Le 11 mars 10 à 17:54, Neal R. Harvey a écrit :
>>>
>>>> I would hope that the value returned from 
>>>> labelMap->GetNumberOfLabelObjects() would
>>>> be the same as the maximum value of the watershed segmented image.
>>>
>>>
>>> The watershed doesn't produce consecutive labels, so this won't be 
>>> true.
>>> The greatest label in the watershed output is likely to be a lot 
>>> greater than the actual number of objects.
>>   Yep, I had just remembered that. Doh! I am assuming that I can use 
>> the RelabelComponentImageFilter to
>>   make the labels consecutive, as this would make things a lot easier.
>
> You can also use RelabelLabelMapFilter, to relabel the label objects 
> instead of relabelling all the pixel in the labeled image.
    OK. Thanks again. I will try that. Also, how does one turn on the 
computation of the perimeter, Feret diameter, etc.?