Hood ROS 2 Foxy Image Tools Test 20210708
From wikidb
Foxy has image_tools e.g. publisher
Use cam2image
TERMINAL 1
$ ros2 run image_tools cam2image --ros-args -p frequency:=2.0
[ WARN:0] global ../modules/videoio/src/cap_gstreamer.cpp (935) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
[INFO] [1625764868.106752791] [cam2image]: Publishing image #1
[INFO] [1625764868.606034554] [cam2image]: Publishing image #2
[INFO] [1625764869.106041374] [cam2image]: Publishing image #3
[INFO] [1625764869.605974867] [cam2image]: Publishing image #4
[INFO] [1625764870.105977910] [cam2image]: Publishing image #5
[INFO] [1625764870.605968277] [cam2image]: Publishing image #6
[INFO] [1625764871.105943033] [cam2image]: Publishing image #7
[INFO] [1625764871.605912645] [cam2image]: Publishing image #8
[INFO] [1625764872.105910776] [cam2image]: Publishing image #9
TERMINAL 2
$ ros2 topic list
/flip_image
/image
/parameter_events
/rosout
$ ros2 topic echo image
header:
stamp:
sec: 0
nanosec: 0
frame_id: camera_frame
height: 240
width: 320
encoding: bgr8
is_bigendian: 0
step: 960
data:
- 88
- 89
- 84
- 98
- 99
- 94
Installed Location
$ find /opt/ros/ -name image_tools
/opt/ros/foxy/share/image_tools
/opt/ros/foxy/share/ament_index/resource_index/rclcpp_components/image_tools
/opt/ros/foxy/share/ament_index/resource_index/parent_prefix_path/image_tools
/opt/ros/foxy/share/ament_index/resource_index/packages/image_tools
/opt/ros/foxy/share/ament_index/resource_index/package_run_dependencies/image_tools
/opt/ros/foxy/lib/image_tools
$ cd /opt/ros/foxy/lib/image_tools
$ ls
cam2image showimage
Use showImage
TERMINAL 2
$ ros2 run image_tools showimage
[INFO] [1625766280.786449084] [showimage]: Subscribing to topic 'image'
[INFO] [1625766281.048405502] [showimage]: Received image #camera_frame
Received image #camera_frame
