[GRASS-dev] i.segment at Community Sprint

[Markus Metz]

Hi all,

I have tested again i.segment and discovered that for the NC Landsat
2000 imagery the module takes nearly 7 hours for reasonable
segmentation. The i.segment.xl module does the same in 10 seconds. The
region consists of 250 000 cells, not so much. In the documentation it
says that processing the entire ortho image takes about a day. With
the xl version it takes about 10 minutes. I am going to move the xl
version to trunk and keep the original GSoC version in addons for
reference.

Markus M


On Fri, Feb 8, 2013 at 5:47 AM, Eric Momsen <eric.momsen at gmail.com> wrote:
> Sorry for not responding right away, I hadn't realized the code sprint
> started (finished?!) already.  There is a paper deadline this month and a
> thesis to write that has consumed my attention...  I don't think I'll have
> time for anything in February.  If noone else wants/needs to do it sooner, I
> hope to have a break between my thesis writing and starting work this
> summer.  So in April(???) I will find some time to dedicate to GRASS code
> and/or documents again.
>
> -Eric
>
>
> On Mon, Feb 4, 2013 at 3:01 AM, Moritz Lennert
> <mlennert at club.worldonline.be> wrote:
>>
>> On 02/02/13 17:37, Markus Metz wrote:
>>>
>>> On Sat, Feb 2, 2013 at 12:56 PM, Moritz Lennert
>>> <mlennert at club.worldonline.be>  wrote:
>>>>
>>>> Markus and Yann,
>>>>
>>>> If you have the time it might be a great opportunity to use the
>>>> community
>>>> sprint to get i.segment from the addons to trunk. What do you think ?
>>>
>>>
>>> I would prefer i.segment.xl for speed reasons and memory control, but
>>> the shape functionality in i.segment would need to be ported to
>>> i.segment.xl first.
>>
>>
>> I meant i.segment in a global sens, not distinguishing .xl, so that's
>> perfectly fine with me.
>>
>> Eric, any chance for you to look at integrating your work on shapes into
>> i.segment.xl ?
>>
>> Moritz
>
>