Well I don't know how to do cv::Mat_<cv::Vec3d> but this is what I do for a regular cv::Mat.


  cv::Mat cv_image;	// image from camera
  cv_bridge::CvImage cvi;
  ros::Time time = ros::Time::now();		

        // convert OpenCV image to ROS message
        cv_bridge::CvImage cvi;			
        cvi.header.stamp = time;
        cvi.header.frame_id = "camera";
        cvi.encoding = "bgr8";
        cvi.image = cv_image;

    sensor_msgs::Image im;
    cvi.toImageMsg(im);

On Sep 20, 2011, at 10:44 AM, Aditya Gadre wrote:

> Hi all,
> 
> I am new to ROS/OpenCV and have a question about using cv_bridge. What would be the correct encoding to use for cv::Mat_<cv::Vec3d> matrix type.
> 
> Thank you,
> - Aditya
> 
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