compiling stereo_image_proc with local OpenCV
I have read a few places that I should be able to compile stereo_image_proc with a locally compiled OpenCV like this: 1. Clone vision_opencv and image_pipeline into my workspace. (vision_opencv gets...
View Articlepackage.xml for OpenCV
I'm in need of a newer version or OpenCV than is provided by my Ubuntu repo. Is there a version or fork of OpenCV that contains a package.xml so it can be compiled as part of a ROS workspace? Seems...
View ArticleHow to use a service to make a snapshot?
Hello, i already make the python file for the server and client. I am starting the camera in the server file at the begining, so it just starts one time only and keep up while the service is up too....
View Articleros-kinetic is blocking my new opencv install
I'm working on my own custom opencv script and when I try to execute some methods i get the error:  OpenCV Error: Assertion failed (input.dims == 4 &&...
View ArticleWhy cv_bridge uses opencv3.2 in ros melodic?
I have OpenCV 3.4 in my Ubuntu 18. I have installed ros melodic according to the website instructions. However, I have been getting the error: /opt/ros/melodic/lib/image_view/image_view: error while...
View ArticleDisplay ros image on webpage using roslibjs
Hi all,Problem: I am using ros hydro and publishing compressed image on a topic /cameraColor. Also, I am using rosjslib(webpage) to interact with rosbridge_server. Now I want to display image on...
View ArticleSetpoint VS RC Override : which is better solution for quadcopter positioning...
Hey all. I want to ask some question before I'm dead exhausting... I've seen several pages like http://python.dronekit.io/examples/channel_overrides.html or http://wiki.ros.org/mavros What I want to...
View ArticleCannot Converting between ROS images and OpenCV images - Python
Hi, My name is Junifer. And I am a newbie. I am going to learn ROS and OpenCV. And I trying to convert ROS Image to OpenCV Image with Python language. But when i make follow the guide, it is not...
View ArticleHow to use arbitrary version of OpenCV
Hi, i have ROS Kinetic installed and it comes with OpenCV. I also have the latested OpenCV that i downloaded from github and installed in /usr/local. The following code that i wrote will always use...
View ArticleCombines message for image and information gives "invalid initialization error"
Hello, I am currently trying to implement a message that includes the images as well as the detected bounding boxes. The publisher works very well, but the subscriber gives me the following error...
View ArticleCan't install ros-kinetic-opencv3
I am trying to install `opencv3` using terminal. After saying sudo apt-get update i tried sudo apt-get install ros-kinetic-opencv3 But i am getting this error and called: can't find file to patch....
View ArticleTutorial for Image Publisher/Subscriber in Python (Video Stream)
Is there any tutorial or code for image publisher/subscriber in Python?...
View Articledisplay a 16-bit grayscale images from a thermal camera in OpenCV
Hi Guys, I am struggling to display a 16-bit grayscale images from a FLIR tau 2 thermal camera in OpenCV. I tried different images' encoding but what I get is either totally black or totally white...
View ArticleHow to update cv::namedwindow in multi-threading environment?
If 1 out of 2 subscriber receives an image and performs some image-processing. How can the output image be shown in multi-threading environment? And, one more query: Is using `waitkey(1)`, optimal for...
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 Articletf and image stitching with multiple camera topics
I'm looking to mount two cameras on the left and right in parallel on the base of a mobile robot, stitch the images taken from the respective camera topics together and run them through a CNN to...
View ArticleROS2 Windows OpenCV self package?
Hi, I have finished migrating a ROS package to ROS2 and I am currently going to test it on Windows. I had a question regarding the installation of...
View ArticleSource code Kinetic install fails on Fedora when can't find opencv tar file
Source code Kinetic install fails on Fedora when can't find opencv tar file. I get this error: [localhost ros_catkin_ws]$ /usr/bin/wstool init -j8 src kinetic-desktop-full-wet.rosinstall Using initial...
View ArticleHow do I change the version of a package being used? Specifically, I want to...
I want to change the version of opencv I am using to fix a problem I am having, or to at least rule out the version update as the problem cause. The problem is described...
View ArticleHow to use pcl with cuda
Hi, I want to use pcl and openCV with cuda. I know now that I have to install another version of openCV (since the default version of openCV in ROS kinetic does not include cuda modules) and then call...
View Article
![ONEW – KAKERA -Unmei no Piece- – EP [iTunes Plus M4A]](http://is1-ssl.mzstatic.com/image/thumb/Music221/v4/d0/fb/86/d0fb86a5-ba60-4bea-41fb-7f54c125f518/VEATP-45908.jpg/296x296bb.webp)
