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Lets say my camera is subscribed to a topic that produces raw images and display through rviz's camera, I want to have a second node produce some images and then overlay on top of the camera's images then display.
Is this possible in ROS? I'm new to ROS too. Any answers will be very much appreciated.
I'm not aware of any way to make the Camera display do what you want. It only takes in a single Image topic (together with a CameraInfo one).
You could perhaps place the images produced by the "second node" somewhere in RViz's 3D scene (and in the viewport of the Camera display). See #q227304 for a plugin that can do that.
Alternatively, you could perhaps merge / overlay / blend the image(s) (streams) first, publish the result and then subscribe the Camera display to that.
We're overlaying other information on top of the camera images, but we're doing that by subscribing to the camera images in a node, marking them up using OpenCV, and then publishing the result images, which we display in rviz. So there is only one image topic that contains the entire image to display, original + markup.
Asked: 2018-03-27 11:45:46 -0600
Seen: 1,539 times
Last updated: Apr 03 '18
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What is "rviz's camera" exactly? Are you referring to the
Cameradisplay, theImagedisplay, or something else?I'm referring to the Camera display. Thanks