warp_image_nodelet.cpp
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29 
30 #include <cv_bridge/cv_bridge.h>
34 #include <opencv2/core/core.hpp>
35 #include <nodelet/nodelet.h>
36 #include <ros/ros.h>
37 #include <sensor_msgs/Image.h>
38 #include <swri_roscpp/parameters.h>
39 
40 namespace swri_image_util
41 {
43  {
44  public:
46  {
47  }
48 
50  {
51  }
52 
53  void onInit()
54  {
57 
58  std::vector<double> transform;
59  if (priv.hasParam("width") && priv.hasParam("height"))
60  {
61  use_input_size_ = false;
62  swri::getParam(priv, "width", output_size_.width);
63  swri::getParam(priv, "height", output_size_.height);
64  }
65  else
66  {
67  use_input_size_ = true;
68  NODELET_INFO("No ~width and ~height parameters given. Output images will be same size as input.");
69  }
70  priv.param("transform", transform, transform);
71  if (transform.size() != 9)
72  {
73  NODELET_FATAL("~transform must be a 9-element list of doubles (3x3 matrix, row major)");
74  // Return without setting up callbacks
75  // Don't shut down, because that would bring down all other nodelets as well
76  return;
77  }
78  m_ = cv::Mat(transform, true).reshape(0, 3);
79  NODELET_INFO_STREAM("Transformation matrix:" << std::endl << m_);
80 
82  image_pub_ = it.advertise("warped_image", 1);
83  image_sub_ = it.subscribe("image", 1, &WarpImageNodelet::handleImage, this);
84  }
85 
86  void handleImage(sensor_msgs::ImageConstPtr const& image)
87  {
89 
90  cv_bridge::CvImagePtr cv_warped = boost::make_shared<cv_bridge::CvImage>();
91  if (use_input_size_)
92  {
93  output_size_ = cv_image->image.size();
94  }
95  cv::warpPerspective(cv_image->image, cv_warped->image, m_, output_size_, CV_INTER_LANCZOS4);
96 
97  cv_warped->encoding = cv_image->encoding;
98  cv_warped->header = cv_image->header;
99 
100  image_pub_.publish(cv_warped->toImageMsg());
101  }
102 
103  private:
106  cv::Mat m_;
108  cv::Size output_size_;
109  };
110 }
111 
112 // Register nodelet plugin
CvImageConstPtr toCvShare(const sensor_msgs::ImageConstPtr &source, const std::string &encoding=std::string())
Subscriber subscribe(const std::string &base_topic, uint32_t queue_size, const boost::function< void(const sensor_msgs::ImageConstPtr &)> &callback, const ros::VoidPtr &tracked_object=ros::VoidPtr(), const TransportHints &transport_hints=TransportHints())
#define NODELET_INFO_STREAM(...)
ros::NodeHandle & getNodeHandle() const
Publisher advertise(const std::string &base_topic, uint32_t queue_size, bool latch=false)
ros::NodeHandle & getPrivateNodeHandle() const
image_transport::Publisher image_pub_
bool param(const std::string &param_name, T &param_val, const T &default_val) const
SWRI_NODELET_EXPORT_CLASS(swri_image_util, DrawPolygonNodelet)
void publish(const sensor_msgs::Image &message) const
bool hasParam(const std::string &key) const
#define NODELET_INFO(...)
static bool getParam(const ros::NodeHandle &nh, const std::string &name, int &variable)
void handleImage(sensor_msgs::ImageConstPtr const &image)
#define NODELET_FATAL(...)
image_transport::Subscriber image_sub_


swri_image_util
Author(s): Kris Kozak
autogenerated on Sat Jan 21 2023 03:13:20