Hi,
Segmentation is a long process, but what takes the most time is the
"stitching" phase after segmentation inside the blocks (cf 121 blocks in
the following output).
I have a lot of memory and a lot of cores on my machines. I would like to
run on bigger blocks than those of 1024x1024 pixels (ideally no blocking ->
all in memory) to reduce the stitching phase duration (and speed-up the all
process)
Is it possible ? Is it also possible to increase the tiny 128 MB Default
RAM limit ?
I have another question by the way: what exactly does this parameter?
-filter.meanshift.minsize (At first glance, I believed it was to control
the blocks size but obviously not...)
numactl --cpunodebind=1 --membind=1 otbcli_Segmentation -in
attributes_multiband.tif
-mode vector -mode.vector.out segments.shp -filter meanshift
-filter.meanshift.spatialr 20 -filter.meanshift.ranger 20
-filter.meanshift.minsize 10000
2019-03-25 16:04:14 (INFO): Default RAM limit for OTB is 128 MB
2019-03-25 16:04:14 (INFO): GDAL maximum cache size is 4757 MB
2019-03-25 16:04:14 (INFO): OTB will use at most 24 threads
2019-03-25 16:04:14 (INFO): No kwl metadata found in file
/b/home/ipgs/a2s_prod/ON_DEMAND/USERS/David/Urban/JOB_2019-03-22_11-07-55_37
8789/Tiles/31TEM/attributes_multiband.tif
2019-03-25 16:04:14 (INFO): Use threaded Mean-shift segmentation.
2019-03-25 16:04:14 (INFO): Large scale segmentation mode which output
vector data
2019-03-25 16:04:14 (INFO): Estimation will be performed in 121 blocks of
1024x1024 pixels
Computing meanshift segmentation: 2% [*
]
Best regards,
David
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