{"action":"created","issue":{"url":"https://api.github.com/repos/openMVG/openMVG/issues/552","repository_url":"https://api.github.com/repos/openMVG/openMVG","labels_url":"https://api.github.com/repos/openMVG/openMVG/issues/552/labels{/name}","comments_url":"https://api.github.com/repos/openMVG/openMVG/issues/552/comments","events_url":"https://api.github.com/repos/openMVG/openMVG/issues/552/events","html_url":"https://github.com/openMVG/openMVG/issues/552","id":153728113,"number":552,"title":"Consistently different number of poses, based on target volume","user":{"login":"KevinCain","id":5424003,"avatar_url":"https://avatars.githubusercontent.com/u/5424003?v=3","gravatar_id":"","url":"https://api.github.com/users/KevinCain","html_url":"https://github.com/KevinCain","followers_url":"https://api.github.com/users/KevinCain/followers","following_url":"https://api.github.com/users/KevinCain/following{/other_user}","gists_url":"https://api.github.com/users/KevinCain/gists{/gist_id}","starred_url":"https://api.github.com/users/KevinCain/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KevinCain/subscriptions","organizations_url":"https://api.github.com/users/KevinCain/orgs","repos_url":"https://api.github.com/users/KevinCain/repos","events_url":"https://api.github.com/users/KevinCain/events{/privacy}","received_events_url":"https://api.github.com/users/KevinCain/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2016-05-09T08:39:41Z","updated_at":"2016-05-10T18:34:03Z","closed_at":"2016-05-10T18:34:03Z","body":"What follows is strange (to me, at least) but is repeatable and may be just the kind of problem that @pmoulon is a savant at.\r\n\r\nWhen I run the unmodified global script (using SIFT descriptors and the ‘master’ branch) on the \"Chateau de Sceaux\" set  (11 images), all views yield poses as [shown here](http://www.insightdigital.org/openMVG/SfMStructureFromKnownPoses_Report.html).\r\n\r\nThe invocation is:\r\n`python ~/openMVG_Build/software/SfM/SfM_GlobalPipeline.py /home/kevin/source/castle/ ~/test`\r\n\r\nAn _identical_ invocation with a target path on any external drive will reliably yield only 10 poses for the 11 views, as [shown here](http://www.insightdigital.org/openMVG/SfMStructureFromKnownPoses_Report_remote.html).\r\n\r\nThat invocation is:\r\n`python ~/openMVG_Build/software/SfM/SfM_GlobalPipeline.py /home/kevin/source/castle/ /media/kevin/MTTD_SSD_1/test\r\n`\r\n\r\nI’ve tried multiple external mounted volumes, each time with the same result; I’ve also tried many paths on the root volume and the result (poses for each view) is also consistent.\r\n\r\nWhat could account for this?\r\n\r\nIt may be potentially interesting to note that specifying ‘AKAZE_MLDB’ or ‘AKAZE_FLOAT’ results in only 10 views, writing to the home directory or a remote volume.  Sequential SfM returns 11 views in both home and remote directories."},"comment":{"url":"https://api.github.com/repos/openMVG/openMVG/issues/comments/218249152","html_url":"https://github.com/openMVG/openMVG/issues/552#issuecomment-218249152","issue_url":"https://api.github.com/repos/openMVG/openMVG/issues/552","id":218249152,"user":{"login":"KevinCain","id":5424003,"avatar_url":"https://avatars.githubusercontent.com/u/5424003?v=3","gravatar_id":"","url":"https://api.github.com/users/KevinCain","html_url":"https://github.com/KevinCain","followers_url":"https://api.github.com/users/KevinCain/followers","following_url":"https://api.github.com/users/KevinCain/following{/other_user}","gists_url":"https://api.github.com/users/KevinCain/gists{/gist_id}","starred_url":"https://api.github.com/users/KevinCain/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KevinCain/subscriptions","organizations_url":"https://api.github.com/users/KevinCain/orgs","repos_url":"https://api.github.com/users/KevinCain/repos","events_url":"https://api.github.com/users/KevinCain/events{/privacy}","received_events_url":"https://api.github.com/users/KevinCain/received_events","type":"User","site_admin":false},"created_at":"2016-05-10T18:34:03Z","updated_at":"2016-05-10T18:34:03Z","body":"@pmoulon, thanks for noting the \"ANNL2\" matching parameter.  I re-ran local/remote targets with your suggested flags and you're correct, the features match.\r\n\r\nI expected global SfM to need greater correspondence than the sequential method, as @whuaegeanse pointed out.  I've also seen that the number of points, and therefore tracks, changes slightly with each run despite identical input.\r\n\r\nBut what prompted me to write was the consistency of global results over many runs -- local drive tests consistently resulted in all views yielding poses, but remote drives don't. "}}