{"id":436,"date":"2017-12-23T10:02:08","date_gmt":"2017-12-23T02:02:08","guid":{"rendered":"https:\/\/www.cognav.net\/?p=436"},"modified":"2018-01-11T09:21:54","modified_gmt":"2018-01-10T23:21:54","slug":"vision-tool-single-axis-rotation-angle-measurement-toolbox-using-a-camera-and-a-checkboard","status":"publish","type":"post","link":"https:\/\/braininspirednavigation.com\/?p=436","title":{"rendered":"Vision Tool: Single Axis Rotation Angle Measurement Toolbox  Using a Camera and a Checkboard"},"content":{"rendered":"<p align=\"center\"><strong>Single Axis Rotation Angle Measurement Toolbox <\/strong><\/p>\n<p align=\"center\"><strong>Using a Camera and a\u00a0Checkboard<\/strong><\/p>\n<p align=\"center\">Hongxin\u00a0Dong,\u00a0Qiang\u00a0Fu,\u00a0Xu\u00a0Zhao, Quan\u00a0Quan\u00a0and\u00a0Ruifeng\u00a0Zhang<\/p>\n<p style=\"text-align: justify;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0This is a MATLAB toolbox (<strong><a href=\"http:\/\/rfly.buaa.edu.cn\/res\/2015_Dong_AngleMeasurementToolbox.rar\">download<\/a><\/strong>) for angle measurement. The toolbox can be used to measure single axis rotation angles from an image sequence of the\u00a0checkboard (see Fig. 2).\u00a0\u00a0The angle measurement method consists of two steps: calibration of single axis motion and angle measurement. In the first step, intrinsic parameters and the geometry relation of the\u00a0checkboard, the camera and the rotation axis are calibrated by several images without occlusion. Then, the rotation angle of a certain image is measured. For more details, please refer to authors&#8217;\u00a0paper :\u00a0Hongxin\u00a0Dong,\u00a0Qiang\u00a0Fu,\u00a0Xu\u00a0Zhao, Quan\u00a0Quan,\u00a0Ruifeng\u00a0Zhang. \u201cA\u00a0Practical\u00a0Rotation\u00a0Angle Measurement\u00a0Method\u00a0by\u00a0Monocular\u00a0Vision,\u201d Applied Optics, 2015, 54(3): 425\u2013435. [<a href=\"http:\/\/quanquan.buaa.edu.cn\/Publications\/A_Practical_Rotation.pdf\"><strong>PDF<\/strong><\/a>].<\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0More info on <a href=\"http:\/\/quanquan.buaa.edu.cn\/Anglemeasurementtoolbox.html\">the author&#8217;s website<\/a>.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/quanquan.buaa.edu.cn\/Anglemeasurementtoolbox.files\/image006.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/quanquan.buaa.edu.cn\/Anglemeasurementtoolbox.files\/image006.gif\" alt=\"\" width=\"246\" height=\"318\" \/><\/a><\/p>\n<p style=\"text-align: center;\">Fig.2 A sample checkboard for angle measurement toolbox. The number of interesting points of this\u00a0checkboard\u00a0is 54.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Single Axis Rotation Angle Measurement Toolbox Using a Camera and a\u00a0Checkboard Hongxin\u00a0Dong,\u00a0Qiang\u00a0Fu,\u00a0Xu\u00a0Zhao, Quan\u00a0Quan\u00a0and\u00a0Ruifeng\u00a0Zhang \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0This is a MATLAB toolbox (download) for angle measurement. The toolbox can be used to measure single axis rotation angles from an image sequence of the\u00a0checkboard (see Fig. 2).\u00a0\u00a0The angle measurement method consists of two steps: calibration of single axis motion and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[179],"tags":[188,189,177,191,187,190],"_links":{"self":[{"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/posts\/436"}],"collection":[{"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=436"}],"version-history":[{"count":4,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/posts\/436\/revisions"}],"predecessor-version":[{"id":743,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=\/wp\/v2\/posts\/436\/revisions\/743"}],"wp:attachment":[{"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/braininspirednavigation.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}