[previous discussion(s) erased] A series of tests completed successfully for thresholds 0.1, 0.3, 0.5, 0.7, 0.9, no matter if memory= 300 or 30000. For the extreme case threshold=0.99, the process failed for both memory= 300 or 30000 settings.
Note, all tests reported below were performed in a data base stored in an external USB 3.0 HDD. # grass version g.version -g version=7.0.svn date=2013 revision=57074 build_date=2013-06-12 First the two failure cases: # threshold 0.99, memory=300 (default setting) time i.segment group=pan out=pan_segmented_threshold_0.99_memory_300 threshold=0.99 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Pass 13: ERROR: Invalid region id 0 and # threshold 0.99, memory=30000 --- This is what I have previously reported time i.segment group=pan out=pan_segmented_threshold_0.99_memory_30000 threshold=0.99 memory=30000 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Pass 13: ERROR: Invalid region id 0 real 37m24.352s user 37m14.000s sys 0m0.784s # ################################### # A series of tests using default RAM # threshold 0.1 time i.segment group=pan out=pan_segmented_threshold_0.1_memory_300 threshold=0.1 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Segmentation converged after 11 iterations. Writing out segment IDs i.segment complete. Number of segments created: 25407 real 8m9.122s user 8m5.582s sys 0m0.296s # threshold 0.3 time i.segment group=pan out=pan_segmented_threshold_0.3_memory_300 threshold=0.3 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Segmentation converged after 11 iterations. Writing out segment IDs i.segment complete. Number of segments created: 11684 real 12m20.273s user 12m19.466s sys 0m0.256s # threshold 0.5 time i.segment group=pan out=pan_segmented_threshold_0.5_memory_300 threshold=0.5 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Segmentation converged after 12 iterations. Writing out segment IDs i.segment complete. Number of segments created: 5495 real 17m35.330s user 17m34.302s sys 0m0.264s # threshold 0.7 time i.segment group=pan out=pan_segmented_threshold_0.7_memory_300 threshold=0.7 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Segmentation converged after 12 iterations. Writing out segment IDs i.segment complete. Number of segments created: 4911 real 18m15.143s user 18m11.188s sys 0m0.300s # threshold 0.9 time i.segment group=pan out=pan_segmented_threshold_0.9_memory_300 threshold=0.9 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Pass 13: Segmentation converged after 13 iterations. Writing out segment IDs i.segment complete. Number of segments created: 1276 real 30m30.619s user 30m29.010s sys 0m0.272s # #################### # Tests using max. RAM # threshold 0.1 time i.segment group=pan out=pan_segmented_threshold_01 threshold=0.1 memory=30000 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Segmentation converged after 11 iterations. Writing out segment IDs i.segment complete. Number of segments created: 25407 real 8m5.619s user 8m2.218s sys 0m0.252s # threshold 0.9 time i.segment group=pan out=pan_segmented_threshold_0.9_memory_30000 threshold=0.9 memory=30000 Loading input band... Pass 1: Pass 2: Pass 3: Pass 4: Pass 5: Pass 6: Pass 7: Pass 8: Pass 9: Pass 10: Pass 11: Pass 12: Pass 13: Segmentation converged after 13 iterations. Writing out segment IDs i.segment complete. Number of segments created: 1276 Nikos _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev