Show pixel co-ordinate with their pixel value in image

[devvaibhav455]

This is regarding a new feature request in Rviz2. Is it possible to show the current mouse pointer's pixel location and value in Rviz just like OpenCV has it. I think it will be easier to debug images in rosbags or live data if someone is working with object detection/ tracking.

OpenCV shows information like this at the bottom of the image after it ends.

Thanks in advance!

[mjcarroll]

This would be an excellent feature, do you have any interest in working on it?

[devvaibhav455]

@mjcarroll Rviz code base will be new to me. If you or somebody could provide some guidance, that would shorten the learning curve and I could then take my time to implement and test it out. Please let me know how you feel about it.