Re: [osg-users] Setting Camera Properties
Hi Mourad, all, Thanks a lot for the information. I took a look at the links, and it sort of helped. At the moment I can see the objects in the correct place (shaded faces, wireframe), however any textures are not displayed correctly. I am using the Single Point Active Alignment Method developed at the Technische Universitat Munich to solve for the camera parameters. Thank you, Yashodhan - Original Message - From: Mourad Boufarguine mourad.boufargu...@gmail.com To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Cc: Rares Ambrus r...@spaceapplications.com Sent: Friday, February 26, 2010 1:51:19 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna Subject: Re: [osg-users] Setting Camera Properties Hi Yashodhan, Take a look at this link http://old.uvr.gist.ac.kr/wlee/web/techReports/ar/Camera%20Models.html . It explains the relationship between the real and virtual camera parameters. Besides that, you may want to look at osgART. Mourad On Fri, Feb 26, 2010 at 1:02 PM, Yashodhan Nevatia yashodhan.neva...@spaceapplications.com wrote: Hi everyone, I am pretty new to OSG, and have been trying to create an application that uses OSG for Augmented Reality. I am using OSG 2.8.1. In order for the augmented reality to be rendered properly, I need to set up the OSG camera with parameters for the human eye (the application uses an optical see through screen to display the augmented information, the background/reality is observed through the display). I am setting the position and orientation as the view matrix, this seems to work fine. What I am having some trouble with is setting up the projection matrix. As far as I know, this is where I have to include the internal parameters of the camera being modeled. For a simple set up this includes the focal distances (along the axes of the image plane) and the center of the image plane, and is described by the matrix: fx 0 cx 0 fy cy 0 0 1 If anyone could help me out here, it would be greatly appreciated. Thank you, Yashodhan -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Setting Camera Properties
Hi Yashodhan, Since you see the objects in the right place, I think the problem is not the camera pose. Can you send some screenshots so we can understand the problem ? Do you use osgART ? if not, how did you setup the HUD containing the video ? Mourad On Mon, Mar 1, 2010 at 5:10 PM, Yashodhan Nevatia yashodhan.neva...@spaceapplications.com wrote: Hi Mourad, all, Thanks a lot for the information. I took a look at the links, and it sort of helped. At the moment I can see the objects in the correct place (shaded faces, wireframe), however any textures are not displayed correctly. I am using the Single Point Active Alignment Method developed at the Technische Universitat Munich to solve for the camera parameters. Thank you, Yashodhan - Original Message - From: Mourad Boufarguine mourad.boufargu...@gmail.com To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Cc: Rares Ambrus r...@spaceapplications.com Sent: Friday, February 26, 2010 1:51:19 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna Subject: Re: [osg-users] Setting Camera Properties Hi Yashodhan, Take a look at this link http://old.uvr.gist.ac.kr/wlee/web/techReports/ar/Camera%20Models.html . It explains the relationship between the real and virtual camera parameters. Besides that, you may want to look at osgART. Mourad On Fri, Feb 26, 2010 at 1:02 PM, Yashodhan Nevatia yashodhan.neva...@spaceapplications.com wrote: Hi everyone, I am pretty new to OSG, and have been trying to create an application that uses OSG for Augmented Reality. I am using OSG 2.8.1. In order for the augmented reality to be rendered properly, I need to set up the OSG camera with parameters for the human eye (the application uses an optical see through screen to display the augmented information, the background/reality is observed through the display). I am setting the position and orientation as the view matrix, this seems to work fine. What I am having some trouble with is setting up the projection matrix. As far as I know, this is where I have to include the internal parameters of the camera being modeled. For a simple set up this includes the focal distances (along the axes of the image plane) and the center of the image plane, and is described by the matrix: fx 0 cx 0 fy cy 0 0 1 If anyone could help me out here, it would be greatly appreciated. Thank you, Yashodhan -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Setting Camera Properties
Hi everyone, I am pretty new to OSG, and have been trying to create an application that uses OSG for Augmented Reality. I am using OSG 2.8.1. In order for the augmented reality to be rendered properly, I need to set up the OSG camera with parameters for the human eye (the application uses an optical see through screen to display the augmented information, the background/reality is observed through the display). I am setting the position and orientation as the view matrix, this seems to work fine. What I am having some trouble with is setting up the projection matrix. As far as I know, this is where I have to include the internal parameters of the camera being modeled. For a simple set up this includes the focal distances (along the axes of the image plane) and the center of the image plane, and is described by the matrix: fx 0cx 0fy cy 001 If anyone could help me out here, it would be greatly appreciated. Thank you, Yashodhan -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Setting Camera Properties
Hi Yashodhan, Take a look at this link http://old.uvr.gist.ac.kr/wlee/web/techReports/ar/Camera%20Models.html . It explains the relationship between the real and virtual camera parameters. Besides that, you may want to look at osgART. Mourad On Fri, Feb 26, 2010 at 1:02 PM, Yashodhan Nevatia yashodhan.neva...@spaceapplications.com wrote: Hi everyone, I am pretty new to OSG, and have been trying to create an application that uses OSG for Augmented Reality. I am using OSG 2.8.1. In order for the augmented reality to be rendered properly, I need to set up the OSG camera with parameters for the human eye (the application uses an optical see through screen to display the augmented information, the background/reality is observed through the display). I am setting the position and orientation as the view matrix, this seems to work fine. What I am having some trouble with is setting up the projection matrix. As far as I know, this is where I have to include the internal parameters of the camera being modeled. For a simple set up this includes the focal distances (along the axes of the image plane) and the center of the image plane, and is described by the matrix: fx 0cx 0fy cy 001 If anyone could help me out here, it would be greatly appreciated. Thank you, Yashodhan -- Yashodhan Nevatia Systems Engineer Space Applications Services Leuvensesteenweg 325 B-1932 Zaventem Belgium Tel: +32 (0)2-721.54.84 Fax: +32 (0)2-721.54.44 URL: www.spaceapplications.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
