depth information from Astra camera
Hello, I am trying to get the distance to the defined object by using Astra camera with /camera/depth/image_raw topic. By using OpenCV library and RGB image from topic /camera/rgb/image_raw I have...
View ArticleGetting depth information from point using Python
Hi guys, I'm trying to get depth information from a specific point. I'm using openni_launch topics "camera/rgb/image_color" (to calculate the point) and "camera/depth/image" (to get depth...
View ArticleHow to calculate the distance to object with orbbec astra camera
Hello, I am using orbbec Astra camera in order to get the distance to the already detected object. I have detected the object by using OpenCV and /brg/image_raw topic from Astra camera. Now I want to...
View ArticleAre all the 16 bits of Realsense D415 depth message valid?
Hi! I am using an Intel Realsense camera D415 and I have got the depth message from a ros topic. The depth values for each pixel in RGB image is in the range of 0~65535. It is obvious that the depth...
View ArticleHow to get the correct X Y distance from depth camera
Hi, I would like to create TF for an object detected in OpenCV using depth camera. When I look at the code from the book "ROS Robotics By Example", they use the X, Y coordinate detected in the picture...
View Articledepth data retrieved by image_transport has confusing format
- OS: Ubuntu 16.04 LTS - ROS distro: kinetic Hey, I am reading depth data from a Microsoft Kinect using the freenect package. My Node: #include #include #include #include #include #include #include...
View Articlecreate point cloud2 from depth image
Hi, I have a image message of depth image. I need to create point cloud2 from that message, how can I do it? I don't have camera info!!!. I couldn't find any document for that. please help me.
View ArticleRunning rtabmap on bag of rgb and depth images
Hi, I want to run ros rtabmap on a bag of rgb and depth images, with the following topics: rostopic list /camera/depth/camera_info /camera/depth/image /camera/rgb/camera_info /camera/rgb/image_color I...
View Articlertabmap fails to run a bag of depth and rgdb images
Hi, I am playing a bag of 16 bits-per-pixel depth and 8 bit rgb images. While playing the bag, I can extract both the rgb and the depth images into files (to verify that the data is ok) (I used the...
View Articlerviz not showing 16 bits-per-pixel, single channel depth images
Hi, I am playing a bag of 16 bits-per-pixel depth and 8 bit rgb images. While playing the bag, I can extract both the rgb and the depth images into files (verifying that the data is ok) (I used the...
View ArticleDepth image from rectified stereo images or disparity image
I need a depth image for my project(MoveIt robotic arm with CV). Stereo_image_proc package provides rectified stereo images and disparity image. I can view them in RVIZ and rqt_image_view. What I have...
View ArticleLocalization using 3D OctoMap structure
Hello there, Firstly, i am a quite newbie in ROS and OctoMap and even more on PCL, and as i search around ros.answers most of the questions were quite old regarding OctoMap. So, I have builded a 3D...
View ArticleOctomap voxel occupancy probabilities getting stuck
I am using octomap to maintain an occupancy grid from depth camera point cloud measurements, and I've noticed that some nodes seem to get stuck in an occupied or free state, and never get updated by...
View Articledifferent encodings of depth image for real & simulated kinect
Hi all I've got a Gazebo simulation of a kinect camera, where I'm subscribing to the ROS topic `/camera/depth/image_raw`, which is of type...
View ArticleTurtlebot depth image not showing in image_view
Hello, I want to try some opencv algorithms with depth images from the turtlebot1 (create base). I want to save them for later use because of the complexity of modifying and remaking a node. We have...
View ArticleCreate PointCloud2 in Matlab
I am looking to create a PointCloud2 message in MATLAB and publish back to ROS via the Robotics Systems Toolbox. I am receiving a PointCloud2 message from my Intel Realsense camera and processing the...
View Articleperformance collapses upon subscribing to depth/image topic(s) on turtlebot
I have two PCs on a Turtlebot2. One is running the turtlebot nav stack and openni (on hydro). The other is running cmvision_3d to do 3d blob detection (on jade) (it's a python package that combines...
View ArticleHow to use depth_image_proc
I am running gazebo 7, ubuntu 16.04, ROS kinetic. I've attached a kinect depth camera to the end effector of a UR5. I want to be able to take the data from image_raw and convert it into readable...
View ArticleCan't visualize Pepper's PointCloud using PCL viewer
I have written a piece of code which subscribes to my Pepper Robot's depth_registered/points topic, converts the Sensor::msg object to pcl::PointCloud using pcl::fromROSMsg(), when I try to visualize...
View ArticleIs it possible to get odometry only with a depth map and/or IR image?
I am about to buy Intel RealSense D410 OEM camera module, which is identical to the D415, except missing the RGB camera. Will I be able to calculate visual odometry with it? Which ROS packages should I...
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