{"action":"created","issue":{"url":"https://api.github.com/repos/Itseez/opencv/issues/5138","labels_url":"https://api.github.com/repos/Itseez/opencv/issues/5138/labels{/name}","comments_url":"https://api.github.com/repos/Itseez/opencv/issues/5138/comments","events_url":"https://api.github.com/repos/Itseez/opencv/issues/5138/events","html_url":"https://github.com/Itseez/opencv/issues/5138","id":99418991,"number":5138,"title":"Multiblock Local Binary Pattern in object detect module confusion.","user":{"login":"warmspringwinds","id":2501383,"avatar_url":"https://avatars.githubusercontent.com/u/2501383?v=3","gravatar_id":"","url":"https://api.github.com/users/warmspringwinds","html_url":"https://github.com/warmspringwinds","followers_url":"https://api.github.com/users/warmspringwinds/followers","following_url":"https://api.github.com/users/warmspringwinds/following{/other_user}","gists_url":"https://api.github.com/users/warmspringwinds/gists{/gist_id}","starred_url":"https://api.github.com/users/warmspringwinds/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/warmspringwinds/subscriptions","organizations_url":"https://api.github.com/users/warmspringwinds/orgs","repos_url":"https://api.github.com/users/warmspringwinds/repos","events_url":"https://api.github.com/users/warmspringwinds/events{/privacy}","received_events_url":"https://api.github.com/users/warmspringwinds/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Itseez/opencv/labels/question","name":"question","color":"cc317c"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2015-08-06T11:50:01Z","updated_at":"2015-08-10T10:37:11Z","closed_at":"2015-08-07T07:27:16Z","body":"Hello.\r\n\r\nRecently I was following the original [paper](http://sdpy.googlecode.com/svn/tags/temp/unsorted3/to_delete/tmp/unsorted/to_remove/research/my_papers/phdthesis/review/survey/MB-LBP/fulltext.pdf) about the gentle adaboost training.\r\n\r\nI was a little bit confused by the fact that in the paper they use multi-branch tree with 256 values, but the implementation of `traincascade` and [cascade xml files](https://github.com/Itseez/opencv/blob/master/data/lbpcascades/lbpcascade_frontalface.xml#L34) have a two branch tree. Is it a problem or a special trick. I didn't find any information in documentation. I would be really glad if someone briefly explains this thing or point me out the part in documentation where this thing is described.\r\n\r\nThank you."},"comment":{"url":"https://api.github.com/repos/Itseez/opencv/issues/comments/129402805","html_url":"https://github.com/Itseez/opencv/issues/5138#issuecomment-129402805","issue_url":"https://api.github.com/repos/Itseez/opencv/issues/5138","id":129402805,"user":{"login":"StevenPuttemans","id":4621239,"avatar_url":"https://avatars.githubusercontent.com/u/4621239?v=3","gravatar_id":"","url":"https://api.github.com/users/StevenPuttemans","html_url":"https://github.com/StevenPuttemans","followers_url":"https://api.github.com/users/StevenPuttemans/followers","following_url":"https://api.github.com/users/StevenPuttemans/following{/other_user}","gists_url":"https://api.github.com/users/StevenPuttemans/gists{/gist_id}","starred_url":"https://api.github.com/users/StevenPuttemans/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StevenPuttemans/subscriptions","organizations_url":"https://api.github.com/users/StevenPuttemans/orgs","repos_url":"https://api.github.com/users/StevenPuttemans/repos","events_url":"https://api.github.com/users/StevenPuttemans/events{/privacy}","received_events_url":"https://api.github.com/users/StevenPuttemans/received_events","type":"User","site_admin":false},"created_at":"2015-08-10T10:37:11Z","updated_at":"2015-08-10T10:37:11Z","body":"I have no exact idea, since I did not yet dig that deep into the code yet. But I am guessing that it will be somewhere in the boosting functionality."}}