image_annotator.cpp
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00034 
00036 
00037 #include <ros/ros.h>
00038 #include <boost/thread/mutex.hpp>
00039 
00040 #include <calibration_msgs/CalibrationPattern.h>
00041 #include <sensor_msgs/Image.h>
00042 #include <cv_bridge/cv_bridge.h>
00043 #include <opencv2/imgproc/imgproc.hpp>
00044 #include <message_filters/time_synchronizer.h>
00045 #include <message_filters/subscriber.h>
00046 
00047 namespace image_cb_detector
00048 {
00049 
00050 class ImageAnnotator
00051 {
00052 public:
00053   ImageAnnotator();
00054 
00055   void processPair(const sensor_msgs::ImageConstPtr& image, const calibration_msgs::CalibrationPatternConstPtr& features);
00056 private:
00057   ros::Publisher image_pub_;
00058   ros::NodeHandle n_;
00059 
00060   // Params
00061   int marker_size_;
00062   double scaling_;
00063 };
00064 
00065 }
00066 
00067 using namespace image_cb_detector;
00068 
00069 ImageAnnotator::ImageAnnotator()
00070 {
00071   image_pub_ = n_.advertise<sensor_msgs::Image>("annotated", 1);
00072 
00073   ros::NodeHandle local_ns_("~");
00074 
00075   local_ns_.param("marker_size", marker_size_, 1);
00076   local_ns_.param("scaling", scaling_, 1.0);
00077   ROS_INFO("[marker_size]: %i", marker_size_);
00078   ROS_INFO("[scaling]: %.3f", scaling_);
00079 }
00080 
00081 void ImageAnnotator::processPair(const sensor_msgs::ImageConstPtr& image, const calibration_msgs::CalibrationPatternConstPtr& features)
00082 {
00083   try {
00084     cv_bridge::CvImageConstPtr cv_image = cv_bridge::toCvShare(image, "rgb8");
00085 
00086     // ***** Resize the image based on scaling parameters in config *****
00087     const int scaled_width  = (int) (.5 + cv_image->image.cols  * scaling_);
00088     const int scaled_height = (int) (.5 + cv_image->image.rows * scaling_);
00089     cv::Mat cv_image_scaled;
00090     cv::resize(cv_image->image, cv_image_scaled, 
00091           cv::Size(scaled_width, scaled_height), 0, 0, CV_INTER_LINEAR);
00092 
00093     if (features->success)
00094     {
00095       cv::Point2i pt0(features->image_points[0].x*scaling_, 
00096             features->image_points[0].y*scaling_);
00097       cv::circle(cv_image_scaled, pt0, marker_size_*2, cvScalar(0,0,255), 1) ;
00098       for (unsigned int i=0; i<features->image_points.size(); i++)
00099       {
00100         cv::Point2i pt(features->image_points[i].x*scaling_, 
00101               features->image_points[i].y*scaling_);
00102         cv::circle(cv_image_scaled, pt, marker_size_, cvScalar(0,255,0), 1) ;
00103       }
00104     }
00105     else
00106     {
00107       for (unsigned int i=0; i<features->image_points.size(); i++)
00108       {
00109         cv::Point2i pt(features->image_points[i].x*scaling_,
00110               features->image_points[i].y*scaling_);
00111         cv::circle(cv_image_scaled, pt, marker_size_, cvScalar(255,0,0), 1) ;
00112       }
00113     }
00114 
00115     // Send the annotated image over ROS
00116     sensor_msgs::Image result_image = *(cv_bridge::CvImage(cv_image->header, cv_image->encoding, cv_image_scaled).toImageMsg());
00117     image_pub_.publish(result_image);
00118   } catch(cv_bridge::Exception & e) {
00119     ROS_ERROR("cv_bridge exception: %s", e.what());
00120   }
00121 }
00122 
00123 int main(int argc, char** argv)
00124 {
00125   ros::init(argc, argv, "image_annotator");
00126 
00127   ros::NodeHandle nh;
00128 
00129   ImageAnnotator annotator;
00130 
00131   message_filters::Subscriber<sensor_msgs::Image> image_sub(nh, "image", 1);
00132   message_filters::Subscriber<calibration_msgs::CalibrationPattern> features_sub(nh, "features", 1);
00133   message_filters::TimeSynchronizer<sensor_msgs::Image,
00134                                     calibration_msgs::CalibrationPattern> sync(image_sub, features_sub, 5);
00135 
00136   sync.registerCallback(boost::bind(&ImageAnnotator::processPair, &annotator, _1, _2));
00137 
00138   ros::spin();
00139   return 0;
00140 }
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image_cb_detector
Author(s): Vijay Pradeep and Eitan Marder-Eppstein
autogenerated on Thu Aug 15 2013 10:15:24