Sure! just subscribe to the RGB image topic. Assuming you started the openni with
roslaunch openni_launch openni.launch
Just subscribe to /camera/rgb/image_raw topic. The sensor_msgs/Image messages you get can be easily converted to OpenCV with cv_bridge package.
Originally posted by jorge with karma: 2284 on 2014-09-02
This answer was ACCEPTED on the original site
Post score: 1
Comment by sumanth on 2014-09-02:
oh thanks, any already available packages for text extraction from images.
Comment by Martin Peris on 2014-09-02:
Dear @sumanth, if this answer is satisfactory for you, please, mark it as correct. Also, it would be more appropriate to ask about the package for text extraction from images as a new question, as it could be helpful for other people. Thank you for helping us keep the forum organised.