Getting a double image while Running camera Calibrator and ptam

[siddyyagno3]

screenshot from 2016-02-09 22 21 30
While running Ptam and camera calibration we are getting a double image.
Our camera is logitech c270 http://www.logitech.com/en-in/product/hd-webcam-c270
We are publishing image using image publisher http://wiki.ros.org/image_transport/Tutorials/PublishingImages.
Running camera calibrator using
rosrun ptam cameracalibrator image:=/camera/image.
Our ubuntu is 14.04.
Ros version is indigo.
open cv version 2.4.9
Thanks in advance for any help.

[vanurag]

Probably you are having similar issue as #76 You need to convert your color images to grayscale using image_proc

[siddyyagno3]

Thanx
yeah I fixed it by subscribing to image_mono