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Questions tagged [depth]

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3D LIDAR and Depth camera

I am using Ouster 3D-Lidar and depth cameras in a single robot.How can both be placed in a robot to avoid any cross-talk interference?
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Localization of Object in Rviz and Gazebo

I have a Simulated Robot in Gazebo and Rviz and i want to use a Camera and Bring an Object present in the Real World into Rviz, so that the Robot can see this Object. I would like to represent this ...
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depth aligned capture doesn't yield same number of rgb and depth frames -- cv_bridge exception: '[16UC1] is not a color format. but [bgr8] is

Steps for reproducing the problem with an Intel RealSense D435 camera using ROS Noetic inside a docker. In the first terminal: ...
Mona Jalal's user avatar
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1 answer
151 views

Can not convert depth image to pointCloud2 using depth_image_proc

I am trying to convert depth image generated by depth camera into pointCloud2 using depth_image_proc. I publish depth image and camera info from the my camera node and generated launcher for invoking ...
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1 answer
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What are the information represented by echo the topic of camera_info and image_raw?

Hi, I am using a multi camera plugin with SDF and the left and right images are published well in Rviz2. I wish to know the depth/distance of the object from the camera based on the images produced ...
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1 answer
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Extract a Volume of points from a PointCloud2 message

Hi all, I'm trying to achieve something simple, yet I can't seem to find a way to do this. I have a PointCloud2 (as a .pcd file) and a bounding box defined in the same frame as the PointCloud2. I want ...
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1 answer
49 views

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 ...
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1 answer
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How 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 ...
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2 answers
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Are 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 ...
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1 answer
7 views

How 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 ...
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2 answers
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[SOLVED] rviz 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 ...
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Create 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 ...
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1 answer
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Difference between depth image types

Trying to understand the difference between depth images and how to convert between them. I have two bag files from which I am displaying depth image topics below. The image on the left is the rgb ...
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1 answer
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question on conversion of depth image

I have a depth image (128, 414, 3) type 64FC3. I could like to convert this to be acceptable to send to rtabmap_ros/point_cloud_xyzrgb . However I am not sure how to covert this image into an ...
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2 answers
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ASUS Xtion 2 - how to intergrate in ros

Hi everyone, was wondering if anyone has tried integrating xtion 2 into ros. I have recently obtained it and was wondering if anybody has experience with this new version of xtion. Also, the provided ...
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1 answer
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how does light effect depth from camera?

hi guys , just a general question i wanted to ask, that i am using intel realsense r200 camera and i am doing color tracking with it... i just want to know because of different light environments , my ...
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1 answer
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Unable to store the depth map in 32FC1 format?

Hello! I want to get the depth data from Creative 3d Senz camera. I am not able to store the depth map in its correct format. Please see the snippet below. ...
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1 answer
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How to interpret data matrix in sensor_msgs/Image?

I am subscribing to the topic /camera/depth/image_rect_color in the package zed-ros-wrapper to obtain depth information using a zed camera. Right now, my subscriber ...
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1 answer
10 views

Is this the right way to obtain depth information?

Hello, I am trying to find the closest object to a zed camera. I am using the package: zed_wrapper. I need to find the depth (z value) of each pixel in the scene. My understanding is that the topic: /...
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1 answer
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Save images kinect - 30fps

I have to record a dataset using the kinect, it should contains RBG images and depth images.. Using this code: ...
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1 answer
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Kinect accuracy in depth

Hi, I use a Kinect for Xbox 360. What is the accuracy of depth in the different ranges ? Thanks for reply. Originally posted by goupil35000 on ROS Answers with karma: 113 on 2016-03-14 Post score: 0
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1 answer
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Any suggestions for combining scans of different frequencies?

I'm combining two scans, one extracted from a depth camera, and the other from a 2D LIDAR. But I'm getting some jitter from the depth camera's scan's contribution. I suppose it's to be expected when ...
ruffsl's user avatar
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1 answer
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why RGB and depth Image synchronization not working? [Solved]

why this works ? but not the bottom one? ...
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1 answer
7 views

depth_image_proc point_cloud_xyzrgb

Trying to run depth image proc on remote pc. But not getting any images processed. Can someone look at my set up and see if it is the launch file or topic specification. It looks like depth image proc ...
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0 votes
1 answer
4 views

Depth sensing camera recommendation?

For getting started with depth sensing in ROS-Industrial I want to purchase a depth sensing camera which is supported in ROS. I am searching a depth + RGB camera. Therefore the Xtion (only depth) is ...
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2 answers
5 views

Getting the picoflexx depth sensor working on ROS [solved]

Hi, I'm trying to get the picoflexx depth sensor working with ROS Indigo on Ubuntu 14.04. I can run the normal royaleviewer.sh from the official package "libroyale-1.0.5.40-LINUX-64Bit", and ...
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1 answer
19 views

Getting 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 ...
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1 answer
6 views

kinect depth and rgb registration

Hi, im able to have rgb point cloud by registration using openni rqt_reconfigure. however, i want to access a pixel in rgb image (camera image_color topic) and find its depth. Which topic should i ...
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1 answer
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What does the "depth" mean on earth?

I am really confused about the meaning of "depth" which is acquired by a RGB-D camera. I think there are two meanings, 1: The distance from a point in the 3-D world to the infrared camera ...
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0 votes
1 answer
3 views

Generation online 3D map from a RGB Camera

Hi! I need to create a 3D map with an ArDrone 2.0 in real time (while the drone's still acquiring data), but its camera doesn't have a depth sensor, otherwise the RGBDSLAM would be a good choice, i ...
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0 votes
1 answer
20 views

what is the distance unit of /camera/depth/image_raw

Hello I have generated a bag file using an Turtlebot Kinect camera with openni and it contains the topic /camera/depth/image_raw. I subscribed to this topic and got the depth image correctly and I ...
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0 votes
1 answer
5 views

Why my depth map is so bad?

Hello, I don't know if it's normal to obtain this kind of depth map ? Can you tell me ? What I did is the following: i have dataset with left and right image. Thank to stereo_image_proc, I obtained ...
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2 answers
44 views

How to obtain depth map from stereo camera?

Hello, I would like to try a visual odometry algorithm with the KITTI dataset. However the KITTI dataset, in my case, has only sequences of pictures with the left and right camera. I don't have any ...
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1 answer
4 views

How to Record the RGB and Depth image of Kinect by Openni?

Hi, sorry to disturb everyone. I am new to ROS or Kinect. But my tutor asked me to record the RGB and Depth image through Openni, and he told me not to use the ROS topic. As he wants to get some pure ...
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0 votes
1 answer
2 views

fovis on depth-only sensors?

Hey, I wanted to implement SLAM on Occipital's Structure Sensor which happens to be a depth only camera and provides no RGB images. I was wondering if there is anyway to use the Fovis package to ...
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0 votes
1 answer
2 views

Getting clear kinect depth data

I am using ros node and getting topic with sub = nh.subscribe("/camera/depth/image", 1, &Subscribe_Depth::callback, this); and convert to opencv <...
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1 answer
7 views

Disparity image reconstruction

I am using two prosilica cameras in order to generate the disparity image. by the help of stereo_image_proc I can generate the disparity image and is available in /stereo/disparity_image topic. Now in ...
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0 votes
1 answer
39 views

RGB and depth image to point cloud data

My System : Ubuntu 12.04, ROS Fuerte, Python Goal: Want to combine rgb and depth image to point cloud data. I am using depth_image_proc/point_cloud_xyzrgb nodelet to achieve this. Just to test it, I ...
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0 votes
1 answer
2 views

calculate depth of a point using kinect..?

i am using kinect in ROS. i am working with indigo, ubuntu 14.04. .. my doubt is how can i calculated depth of a point in image. My task is to locate a point in image using mouse and it will tell me ...
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1 answer
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Creative senz3d urdf or measurements

Hi Has anyone made a URDF for the Creative Senz3D or know where to find one? I'm looking for measurements that describe the relationship between different frames of the Creative Senz3D. Its also known ...
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0 votes
1 answer
12 views

How to retrieve XYZ co-ordinates from a raw depth image?

I am taking a depth image from /camera/depth_registered/image_raw and thresholding it to find objects within a certain range. I would like to find the xyz co-ordinates of these objects in order to ...
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0 votes
1 answer
52 views

how to save rgb image and depth image

Hi all, I would like to record a scene and save depth image + rgb image and point cloud data of the kinect sensor automatically into disk in jpg or png format. I use RGBDSLAM to collect the data.And I ...
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0 votes
1 answer
6 views

Get average distance from a depth Rect image

I'm trying to get access to the average distance of some part of an image. What i've done : Get image from ROS, conver to to OPENCV image, save depth image, crop the image using cv::Rect. So, i get ...
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1 answer
2 views

Depth filter of a (Kinect) image

Hi, I run a Kinect sensor and evaluate depth and camera information to track positions of small robots. The idea is to use the pointcloud to identify all robots (2.5m < z < 3m). I used a pcl/...
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1 answer
5 views

Format of depth value openni2_camera

I used the openni2 to install in my ARM-Board from this website link, now I want to know clearly how is the format of the depth data get from Asus Xtion looks like? Because I met some confuses when I ...
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1 answer
3 views

Depth map from bumblebee2 camera?

Hi, I am trying to get the coordinates in space (X,Y,Z) of an object. For this, I am detecting the object using the image from the bumblebee's left camera (from here I can obtain the X and Y ...
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1 answer
6 views

Problem with converting image from depth to grayscale

I am trying to convert depth image from (/camera/depth/image) to grayscale image (/camera/rgb/image_mono). This is my code. ...
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0 votes
1 answer
44 views

how to get value of depth image from *.bag file

Hi, everyone~ I have created *.bag file with rosbag, but how can I extract the value of each pixel in the depth image from the *.bag file? My goal is to create a .txt for each depth image in *.bag, ...
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0 votes
1 answer
2 views

How to read depth_registered image in callback?

Hello, I am trying to read depth_registered/image_rect image in my callback function as following ...
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1 answer
1 view

depth of points in RGB using kinect driver

the depth values that obtain by kinect driver is actually a no. of streams that continuously changing even if kinect remain stationary can u tell me plz y is it so? secondly if i want to access the ...
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