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

[Pietro]

Hi,

On Wed, Jul 31, 2013 at 12:39 PM, Moritz Lennert
<mlennert at club.worldonline.be> wrote:
>> ok, I can do it... which name should I use for the hierarchical module?
>
> i.segment.hierarchical ?

I change my mind...

Do we really need to make a module only to avoid the user to define a cycle?
>From my point of view we should avoid to bloat the GRASS' code with
this kind of codes

the code to do this operation is:

{{{
from __future__ import print_function
import time
from grass.pygrass.modules import Module


def segment(thresholds, output='seg__%.2f', **opts):
    iseg = Module('i.segment')
    seeds = None
    for thr in thresholds:
        opts['threshold'] = thr
        opts['seeds'] = seeds
        opts['output'] = output % thr
        st = time.time()
        iseg(**opts)
        print("%s, required: %.2fs" % (opts['output'], time.time() - st))
        seeds = opts['output']

# use the function
segment([0.02, 0.05, 0.1],
        group='rgb', method='region_growing', similarity='euclidean',
        minsize=2, iterations=20, overwrite=True)
}}}

and the output will be something like:
{{{
 100%
seg__0.02, required: 15.02s
 100%
seg__0.05, required: 7.82s
 100%
seg__0.10, required: 9.99s
}}}

Best regards

Pietro