rotate_image_nodelet.cpp
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29 
30 #include <string>
31 
32 #include <opencv2/core/core.hpp>
33 
34 #include <ros/ros.h>
35 #include <nodelet/nodelet.h>
38 #include <sensor_msgs/Image.h>
39 #include <cv_bridge/cv_bridge.h>
40 
42 
43 namespace swri_image_util
44 {
46  {
47  public:
49  angle_(0),
50  operations_(0),
51  flip_axis_(false)
52  {
53  }
54 
56  {
57  }
58 
59  void onInit()
60  {
63 
64  priv.param("angle", angle_, angle_);
65 
66  int32_t angle_90 = static_cast<int32_t>(swri_math_util::ToNearest(angle_, 90));
67  flip_axis_ = angle_90 > 0 ? 1 : 0;
68  operations_ = std::abs(angle_90 / 90);
69 
71  image_pub_ = it.advertise("rotated_image", 1);
73  }
74 
75  void ImageCallback(const sensor_msgs::ImageConstPtr& image)
76  {
77  if (operations_ == 0)
78  {
79  image_pub_.publish(image);
80  return;
81  }
82 
84 
85  for (int32_t i = 0; i < operations_; i++)
86  {
87  cv::transpose(cv_image->image, cv_image->image);
88  cv::flip(cv_image->image, cv_image->image, flip_axis_);
89  }
90 
91  image_pub_.publish(cv_image->toImageMsg());
92  }
93 
94  private:
95  double angle_;
96  int32_t operations_;
97  bool flip_axis_;
98 
101 
102  };
103 }
104 
105 // Register nodelet plugin
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())
double ToNearest(double value, double multiple)
ros::NodeHandle & getNodeHandle() const
Publisher advertise(const std::string &base_topic, uint32_t queue_size, bool latch=false)
ros::NodeHandle & getPrivateNodeHandle() const
bool param(const std::string &param_name, T &param_val, const T &default_val) const
image_transport::Subscriber image_sub_
void ImageCallback(const sensor_msgs::ImageConstPtr &image)
SWRI_NODELET_EXPORT_CLASS(swri_image_util, DrawPolygonNodelet)
CvImagePtr toCvCopy(const sensor_msgs::ImageConstPtr &source, const std::string &encoding=std::string())
void publish(const sensor_msgs::Image &message) const


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