sensor_msgs::Image to sensor_msgs::ImagePtr

edit

I'm not sure that I entirely understand the question. If you want to convert a sensor_msgs::Image to a sensor_msgs::Ptr or sensor_msgs:ConsPtr, you only need to wrap it in a boost::shared_ptr:

sensor_msgs::Image::Ptr rosimg = boost::shared_ptr<sensor_msgs::Image>(image_msg);

Note that this is safe only if rosimg is heap-allocated. For example, you could initialize rosimg as:

sensor_msgs::Image::Ptr rosimg = boost::make_shared<sensor_msgs::Image>();

Hello,

If the only thing you want to do is converting a ROS image message into openCV, why don't you follow this cv_bridge tutorial?

Here is the snippet that should interest you:

void imageCb(const sensor_msgs::ImageConstPtr& msg)
{
    cv_bridge::CvImagePtr cv_ptr;
    try
    {
      cv_ptr = cv_bridge::toCvCopy(msg, enc::BGR8);
    }
    catch (cv_bridge::Exception& e)
    {
      ROS_ERROR("cv_bridge exception: %s", e.what());
      return;
    }

    if (cv_ptr->image.rows > 60 && cv_ptr->image.cols > 60)
      cv::circle(cv_ptr->image, cv::Point(50, 50), 10, CV_RGB(255,0,0));

    cv::imshow(WINDOW, cv_ptr->image);
    cv::waitKey(3);
}

Or do you want to do something different? Hope it helps

Raph