ranqi's profile - activity

overview network karma followed questions activity

2013-03-07 11:59:03 -0500	received badge	● Famous Question (source)
2013-02-17 22:42:55 -0500	received badge	● Famous Question (source)
2013-01-12 10:29:14 -0500	received badge	● Famous Question (source)
2012-12-13 07:28:31 -0500	received badge	● Notable Question (source)
2012-12-10 09:46:48 -0500	received badge	● Popular Question (source)
2012-10-30 10:08:19 -0500	received badge	● Notable Question (source)
2012-10-26 10:29:18 -0500	received badge	● Famous Question (source)
2012-10-08 11:55:37 -0500	received badge	● Notable Question (source)
2012-09-15 14:04:25 -0500	received badge	● Popular Question (source)
2012-09-06 18:44:44 -0500	received badge	● Popular Question (source)
2012-08-20 23:13:46 -0500	received badge	● Notable Question (source)
2012-08-15 21:23:11 -0500	received badge	● Popular Question (source)
2012-08-14 17:50:24 -0500	asked a question	How ROS/openni convert kinect's raw disparity to depth(millimeter unit)? Formula(including the default parameter value) please!! Thank you!
2012-08-14 09:08:06 -0500	asked a question	Is the disparity from /camera/depth/disparity 11bit raw data? Hi,guys, I need to do some advanced kinect calibration so I need raw data instead of processed depth data. Any one know if /camera/depth/disparity is raw or not? Thank you! Ranqi
2012-08-06 09:43:45 -0500	asked a question	BUG? topic subscription shutdown() fails to shutdown. Hi, The scenerio is we are trying to do custom kinect calibration and we need both raw IR and RGB image. The kinect/asus hardware do not support stream ir and rgb at the same time, so we need to switch back and forth between two topics, or we will get a "can't stream ir and rgb at the same time, stream rgb only now" warning from ros. The problem is I tried sub.shutdown() the rgb topic subscription but still can't add IR topic subscription and get the same warning. I also tried use ros::topic::waitForMessage<sensor_msgs::image>("/camera/rgb/image_mono", *nodeHandle); which is suppose to subscribe->get a frame of data ->unsubscribe. But I still get the same warning. It seems neither shutdown() nor waitForMessage is able to turn off the subscription to a topic. Is this a bug or I am doing something wrong here? Insights welcomed. Thank you! Best, Ranqi
2012-08-06 09:27:44 -0500	received badge	● Editor (source)
2012-08-06 09:26:16 -0500	asked a question	Format/terminology question about ROS camera calibration file Hi, I have a question about ROS calibration file, which usually looks like following: image_width: 640 image_height: 480 camera_name: depth camera_matrix: rows: 3 cols: 3 data: [576.340422017257, 0, 315.229913874748, 0, 577.120041676589, 250.030883769157, 0, 0, 1] distortion_model: plumb_bob distortion_coefficients: rows: 1 cols: 5 data: [-0.0286095107438031, 0.0222151550967861, 0.00317802383728588, -0.000592924755007265, 0] rectification_matrix: rows: 3 cols: 3 data: [1, 0, 0, 0, 1, 0, 0, 0, 1] projection_matrix: rows: 3 cols: 4 data: [571.976867675781, 0, 314.347170717498, 0, 0, 573.202819824219, 250.547239071138, 0, 0, 0, 1, 0] My question is: what is the difference between camera_matrix and projection_matrix. They all looks like sort of "intrinsics matrix", but they are off a bit numerically. How do I transform our intrinsics matrix from our customized calibration procedure into this format properly? Thank you for any help! Best, Ranqi
2012-07-28 12:33:49 -0500	answered a question	Sequentially get the IR and RGB data from openni_node Did anyone get this work? I tried both WaitForMessage, or sub.shutdown(). Seems none of them would unsubscribe the rgb topic so that ir can get data.
2012-07-28 12:33:24 -0500	answered a question	Sequentially get the IR and RGB data from openni_node Did anyone get this work? I tried both WaitForMessage, or sub.shutdown(). Seems none of them would unsubscribe the rgb topic so that ir can get data.