{"action":"created","issue":{"url":"https://api.github.com/repos/ethz-asl/kalibr/issues/51","repository_url":"https://api.github.com/repos/ethz-asl/kalibr","labels_url":"https://api.github.com/repos/ethz-asl/kalibr/issues/51/labels{/name}","comments_url":"https://api.github.com/repos/ethz-asl/kalibr/issues/51/comments","events_url":"https://api.github.com/repos/ethz-asl/kalibr/issues/51/events","html_url":"https://github.com/ethz-asl/kalibr/issues/51","id":164982073,"number":51,"title":"Calibration target on A4 paper","user":{"login":"shanmo","id":8708551,"avatar_url":"https://avatars.githubusercontent.com/u/8708551?v=3","gravatar_id":"","url":"https://api.github.com/users/shanmo","html_url":"https://github.com/shanmo","followers_url":"https://api.github.com/users/shanmo/followers","following_url":"https://api.github.com/users/shanmo/following{/other_user}","gists_url":"https://api.github.com/users/shanmo/gists{/gist_id}","starred_url":"https://api.github.com/users/shanmo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/shanmo/subscriptions","organizations_url":"https://api.github.com/users/shanmo/orgs","repos_url":"https://api.github.com/users/shanmo/repos","events_url":"https://api.github.com/users/shanmo/events{/privacy}","received_events_url":"https://api.github.com/users/shanmo/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2016-07-12T02:39:26Z","updated_at":"2016-07-12T08:59:15Z","closed_at":null,"body":"Hi,\r\n\r\nI would like to print the calibration target, such as an Aprilgrid or a checkerboard, on A4 paper and use it for calibration. Could anyone kindly advice how to use kalibr_create_target_pdf to specify the size? \r\n\r\nAfter we have the calibration target, how could we set the size in the yaml accordingly? Should we use the size values in the kalibr_create_target_pdf directly or measure it on the actual calibration target printed on the A4 paper?\r\n\r\nAny help is appreciated!\r\n\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/ethz-asl/kalibr/issues/comments/231979527","html_url":"https://github.com/ethz-asl/kalibr/issues/51#issuecomment-231979527","issue_url":"https://api.github.com/repos/ethz-asl/kalibr/issues/51","id":231979527,"user":{"login":"rehderj","id":1918062,"avatar_url":"https://avatars.githubusercontent.com/u/1918062?v=3","gravatar_id":"","url":"https://api.github.com/users/rehderj","html_url":"https://github.com/rehderj","followers_url":"https://api.github.com/users/rehderj/followers","following_url":"https://api.github.com/users/rehderj/following{/other_user}","gists_url":"https://api.github.com/users/rehderj/gists{/gist_id}","starred_url":"https://api.github.com/users/rehderj/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rehderj/subscriptions","organizations_url":"https://api.github.com/users/rehderj/orgs","repos_url":"https://api.github.com/users/rehderj/repos","events_url":"https://api.github.com/users/rehderj/events{/privacy}","received_events_url":"https://api.github.com/users/rehderj/received_events","type":"User","site_admin":false},"created_at":"2016-07-12T08:59:15Z","updated_at":"2016-07-12T08:59:15Z","body":"In general, this would be a valid approach. However, you might experience difficulties identifying such a small target at larger distances depending on the resolution of your camera. Furthermore, the estimation problem should in general be better constrained the more of the area in the image is covered by the target.\r\n\r\nIt is almost always a good idea to print the target as large as feasible."}}
{"actor":{"display_login":"rehderj"}}