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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 the depth of that point.. i already installed openni, pcl. i am also confused of taking which topic i subscribe to calculate depth? please help me step by step.. language c++
Originally posted by ASHISH CHHONKAR on ROS Answers with karma: 41 on 2014-09-11
Post score: 2
The topic you are looking for is the depth/image_rect topic published by the openni stack, which you start via openni_launch (if you're using the kinect). This will be a rectified 2D image, with the intensity of the pixel representing the depth at that point.
As for displaying the image, try taking a look at the image_view node.
Originally posted by paulbovbel with karma: 4518 on 2014-09-12
This answer was ACCEPTED on the original site
Post score: -1
Comment by ASHISH CHHONKAR on 2014-09-13:
thanks a lot.... but this time i got a new problem... on indigo, i am not sure but openni is not installable....
Comment by paulbovbel on 2014-09-13:
If you're having issues installing openni, I'd suggest you open a new question, with some debug output to boot.