Initial Commit

CMakeLists.txt

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+cmake_minimum_required(VERSION 2.8.3)
+project(image_test)
+
+## Find catkin macros and libraries
+## if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)
+## is used, also find other catkin packages
+find_package(catkin REQUIRED COMPONENTS
+  cv_bridge
+  image_transport
+  roscpp
+  rospy
+  sensor_msgs
+  std_msgs
+)
+
+## System dependencies are found with CMake's conventions
+# find_package(Boost REQUIRED COMPONENTS system)
+
+
+## Uncomment this if the package has a setup.py. This macro ensures
+## modules and global scripts declared therein get installed
+## See http://ros.org/doc/api/catkin/html/user_guide/setup_dot_py.html
+# catkin_python_setup()
+
+################################################
+## Declare ROS messages, services and actions ##
+################################################
+
+## To declare and build messages, services or actions from within this
+## package, follow these steps:
+## * Let MSG_DEP_SET be the set of packages whose message types you use in
+##   your messages/services/actions (e.g. std_msgs, actionlib_msgs, ...).
+## * In the file package.xml:
+##   * add a build_depend tag for "message_generation"
+##   * add a build_depend and a run_depend tag for each package in MSG_DEP_SET
+##   * If MSG_DEP_SET isn't empty the following dependency has been pulled in
+##     but can be declared for certainty nonetheless:
+##     * add a run_depend tag for "message_runtime"
+## * In this file (CMakeLists.txt):
+##   * add "message_generation" and every package in MSG_DEP_SET to
+##     find_package(catkin REQUIRED COMPONENTS ...)
+##   * add "message_runtime" and every package in MSG_DEP_SET to
+##     catkin_package(CATKIN_DEPENDS ...)
+##   * uncomment the add_*_files sections below as needed
+##     and list every .msg/.srv/.action file to be processed
+##   * uncomment the generate_messages entry below
+##   * add every package in MSG_DEP_SET to generate_messages(DEPENDENCIES ...)
+
+## Generate messages in the 'msg' folder
+# add_message_files(
+#   FILES
+#   Message1.msg
+#   Message2.msg
+# )
+
+## Generate services in the 'srv' folder
+# add_service_files(
+#   FILES
+#   Service1.srv
+#   Service2.srv
+# )
+
+## Generate actions in the 'action' folder
+# add_action_files(
+#   FILES
+#   Action1.action
+#   Action2.action
+# )
+
+## Generate added messages and services with any dependencies listed here
+# generate_messages(
+#   DEPENDENCIES
+#   sensor_msgs#   std_msgs
+# )
+
+################################################
+## Declare ROS dynamic reconfigure parameters ##
+################################################
+
+## To declare and build dynamic reconfigure parameters within this
+## package, follow these steps:
+## * In the file package.xml:
+##   * add a build_depend and a run_depend tag for "dynamic_reconfigure"
+## * In this file (CMakeLists.txt):
+##   * add "dynamic_reconfigure" to
+##     find_package(catkin REQUIRED COMPONENTS ...)
+##   * uncomment the "generate_dynamic_reconfigure_options" section below
+##     and list every .cfg file to be processed
+
+## Generate dynamic reconfigure parameters in the 'cfg' folder
+# generate_dynamic_reconfigure_options(
+#   cfg/DynReconf1.cfg
+#   cfg/DynReconf2.cfg
+# )
+
+###################################
+## catkin specific configuration ##
+###################################
+## The catkin_package macro generates cmake config files for your package
+## Declare things to be passed to dependent projects
+## INCLUDE_DIRS: uncomment this if you package contains header files
+## LIBRARIES: libraries you create in this project that dependent projects also need
+## CATKIN_DEPENDS: catkin_packages dependent projects also need
+## DEPENDS: system dependencies of this project that dependent projects also need
+catkin_package(
+#  INCLUDE_DIRS include
+#  LIBRARIES image_test
+#  CATKIN_DEPENDS cv_bridge image_transport roscpp rospy sensor_msgs std_msgs
+#  DEPENDS system_lib
+)
+
+###########
+## Build ##
+###########
+
+## Specify additional locations of header files
+## Your package locations should be listed before other locations
+# include_directories(include)
+include_directories(
+  ${catkin_INCLUDE_DIRS}
+)
+
+## Declare a C++ library
+# add_library(image_test
+#   src/${PROJECT_NAME}/image_test.cpp
+# )
+
+## Add cmake target dependencies of the library
+## as an example, code may need to be generated before libraries
+## either from message generation or dynamic reconfigure
+# add_dependencies(image_test ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})
+
+## Declare a C++ executable
+# add_executable(image_test_node src/image_test_node.cpp)
+
+## Add cmake target dependencies of the executable
+## same as for the library above
+# add_dependencies(image_test_node ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})
+
+## Specify libraries to link a library or executable target against
+# target_link_libraries(image_test_node
+#   ${catkin_LIBRARIES}
+# )
+
+#############
+## Install ##
+#############
+
+# all install targets should use catkin DESTINATION variables
+# See http://ros.org/doc/api/catkin/html/adv_user_guide/variables.html
+
+## Mark executable scripts (Python etc.) for installation
+## in contrast to setup.py, you can choose the destination
+# install(PROGRAMS
+#   scripts/my_python_script
+#   DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
+# )
+
+## Mark executables and/or libraries for installation
+# install(TARGETS image_test image_test_node
+#   ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
+#   LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
+#   RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
+# )
+
+## Mark cpp header files for installation
+# install(DIRECTORY include/${PROJECT_NAME}/
+#   DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
+#   FILES_MATCHING PATTERN "*.h"
+#   PATTERN ".svn" EXCLUDE
+# )
+
+## Mark other files for installation (e.g. launch and bag files, etc.)
+# install(FILES
+#   # myfile1
+#   # myfile2
+#   DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}
+# )
+
+#############
+## Testing ##
+#############
+
+## Add gtest based cpp test target and link libraries
+# catkin_add_gtest(${PROJECT_NAME}-test test/test_image_test.cpp)
+# if(TARGET ${PROJECT_NAME}-test)
+#   target_link_libraries(${PROJECT_NAME}-test ${PROJECT_NAME})
+# endif()
+
+## Add folders to be run by python nosetests
+# catkin_add_nosetests(test)
+
+include_directories(include ${catkin_INCLUDE_DIRS})
+
+add_executable(image_publisher src/image_publisher.cpp)
+target_link_libraries(image_publisher ${catkin_LIBRARIES})
+add_dependencies(image_publisher image_test_generate_messages_cpp)
+
+

package.xml

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+<?xml version="1.0"?>
+<package>
+  <name>image_test</name>
+  <version>0.0.0</version>
+  <description>The image_test package</description>
+
+  <!-- One maintainer tag required, multiple allowed, one person per tag --> 
+  <!-- Example:  -->
+  <!-- <maintainer email="[email protected]">Jane Doe</maintainer> -->
+  <maintainer email="[email protected]">andrew</maintainer>
+
+
+  <!-- One license tag required, multiple allowed, one license per tag -->
+  <!-- Commonly used license strings: -->
+  <!--   BSD, MIT, Boost Software License, GPLv2, GPLv3, LGPLv2.1, LGPLv3 -->
+  <license>TODO</license>
+
+
+  <!-- Url tags are optional, but mutiple are allowed, one per tag -->
+  <!-- Optional attribute type can be: website, bugtracker, or repository -->
+  <!-- Example: -->
+  <!-- <url type="website">http://wiki.ros.org/image_test</url> -->
+
+
+  <!-- Author tags are optional, mutiple are allowed, one per tag -->
+  <!-- Authors do not have to be maintianers, but could be -->
+  <!-- Example: -->
+  <!-- <author email="[email protected]">Jane Doe</author> -->
+
+
+  <!-- The *_depend tags are used to specify dependencies -->
+  <!-- Dependencies can be catkin packages or system dependencies -->
+  <!-- Examples: -->
+  <!-- Use build_depend for packages you need at compile time: -->
+  <!--   <build_depend>message_generation</build_depend> -->
+  <!-- Use buildtool_depend for build tool packages: -->
+  <!--   <buildtool_depend>catkin</buildtool_depend> -->
+  <!-- Use run_depend for packages you need at runtime: -->
+  <!--   <run_depend>message_runtime</run_depend> -->
+  <!-- Use test_depend for packages you need only for testing: -->
+  <!--   <test_depend>gtest</test_depend> -->
+  <buildtool_depend>catkin</buildtool_depend>
+  <build_depend>cv_bridge</build_depend>
+  <build_depend>image_transport</build_depend>
+  <build_depend>roscpp</build_depend>
+  <build_depend>rospy</build_depend>
+  <build_depend>sensor_msgs</build_depend>
+  <build_depend>std_msgs</build_depend>
+  <run_depend>cv_bridge</run_depend>
+  <run_depend>image_transport</run_depend>
+  <run_depend>roscpp</run_depend>
+  <run_depend>rospy</run_depend>
+  <run_depend>sensor_msgs</run_depend>
+  <run_depend>std_msgs</run_depend>
+
+
+  <!-- The export tag contains other, unspecified, tags -->
+  <export>
+    <!-- Other tools can request additional information be placed here -->
+
+  </export>
+</package>

src/image_publisher.cpp

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+#include <ros/ros.h>
+#include <image_transport/image_transport.h>
+#include <opencv2/highgui/highgui.hpp>
+#include <cv_bridge/cv_bridge.h>
+//#include <opencv2/opencv.hpp>
+
+int main(int argc, char** argv)
+{
+  ros::init(argc, argv, "image_publisher");
+  ros::NodeHandle nh;
+  image_transport::ImageTransport it(nh);
+  image_transport::Publisher pub = it.advertise("image_topic", 1);
+  cv::VideoCapture cap;
+  bool is_cam_ok = true;
+  if(!cap.open(1))
+  {
+    ROS_INFO("Failed to open camera");
+    is_cam_ok = false;
+  }
+  cv::Mat image;
+  ros::Rate loop_rate(5);
+  while(nh.ok())
+  {
+    if(is_cam_ok)
+    {    
+      cap >> image;
+
+      sensor_msgs::ImagePtr msg = cv_bridge::CvImage(std_msgs::Header(), "bgr8", image).toImageMsg();
+
+
+      pub.publish(msg);
+      ros::spinOnce();
+      loop_rate.sleep();    
+    }
+  }
+}

src/python_img_sub.py

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+#!/usr/bin/env python
+import rospy
+import numpy as np
+import cv2
+from sensor_msgs.msg import Image
+from cv_bridge import CvBridge, CvBridgeError
+
+bridge = CvBridge() #Instantiate CvBridge
+
+def callback(data):
+    try:   
+        cv2_img = bridge.imgmsg_to_cv2(data, "bgr8")
+    except CvBridgeError as e:
+        print(e)
+    else:
+        cv2.imshow("Python Received data", cv2_img)
+        cv2.waitKey(10)
+
+
+def listener():
+
+    rospy.init_node('python_img_sub', anonymous=True)
+
+    rospy.Subscriber("image_topic", Image, callback, queue_size = 1)
+
+    rospy.spin()
+
+if __name__ == '__main__':
+    listener()