Get IR stream from kinect

edit

Hi, everybody,

I need to capture the IR stream from IR camera of kinect and I have to use OpenCv Library for analizing it. Doing so, I built a subscriber at the topic camera/ir/image_raw of openni_launch and converted the captured image with cv_bridge::toCvCopy(img, enc:MONO16), but as result I had a really very dark image (almost totally black).

I tried to used the IR camera with command:

rosrun image_view image_view image:=camera/ir/image_raw

and it works properly, so I ask to you: why it doesn't work in my source?

I write below my code:

ros::Subscriber subIRKinect = nh.subscribe("camera/ir/image_raw", 1000, getKinectIRImage);

void getKinectIRImage (const sensor_msgs::ImageConstPtr img)
{
    //image type mono16
    try
    {
        cv_ptr = cv_bridge::toCvCopy(img, enc::MONO16);
    }
    catch (cv_bridge::Exception& e)
    {
        ROS_ERROR("cv_bridge exception: %s", e.what());
    }
 }

Thanks in advance everybody can help me!! ;)