[GRASS-dev] i.segment: invalid region id 0

[Moritz Lennert]

On 27/07/13 00:19, Nikos Alexandris wrote:
> On Friday 26 of July 2013 15:41:25 Moritz Lennert wrote:
>> On 26/07/13 15:17, Nikos Alexandris wrote:
>>> On Wednesday 17 of July 2013 12:56:58 Nikos Alexandris wrote:
>>>> In any case, if wanted, I will try during the weekend to replicate a Huge
>>>> region, as the one Moritz tested with a "rational" threshold (close to
>>>> zero).
>>>
>>> I couldn't make it -- my machine was under some sort of heavy
>>> reconstruction during the last weekend.  Is this still of interest?  Let
>>> a machine to chew-up a big region with i.segment?
>>
>> Markus and I have been busy testing in the last weeks and thanks to
>> Markus' rapid reaction in correcting some bugs, we've been able to
>> segment an image with 555,727,911 non-null cells in a region with
>> 2,617,375,744 total cells. Markus' machine did this in just 15 hours !
>> On mine it took much longer, but this is probably in large parts due to
>> a software raid 5 that makes disk io really slow.
>
> WoW! Great news!  Lot of work behind the scenes I guess. Thanks a million...
> Let me know if and what I can test (besides my on-going work in which I do use
> i.segment).

Any feedback on your on-going work would already be helpful. Infos about 
performance (speed, quality of segmentation, etc). Tests of hierarchical 
segmentation with increasing thresholds.

Moritz