PointcloudScreenpoint¶
What is this¶
Use pointcloud from kinect
Use pointcloud from laser
Use amplifiered pointclouds published by laser
This is a nodelet to convert (u, v) coordinate on a image to 3-D point. It retrieves 3-D environment as pointcloud.
pointcloud_screenpoint_sample.launch is a sample launch file.
Note¶
This class inherits jsk_topic_tools::ConnectionBasedNodelet
, which can start subscribing topics if published topics are subscribed by the other node.
Subscribing Topics¶
~points
(sensor_msgs/PointCloud2
):Pointcloud source to estimate 3D points that the user wantedt to specify on a 2D screen
~point
(geometry_msgs/PointStamped
):Input point to represent (u, v) image coordinate. Only x and y fileds are used and the header frame_id is ignored. If
~synchronization
parameter is setTrue
,~points
and~point
are synchronized.~rect
(geometry_msgs/PolygonStamped
):Input rectangular region on image local coordinates. Only x and y fields are used and the header frame_id is ignored. And the region should be rectangular. If
~synchronization
parameter is setTrue
,~points
and~rect
are synchronized.~poly
(geometry_msgs/PolygonStamped
):`Input polygonal region in image local coordinates. If
~synchronization
parameter is setTrue
,~points
and~poly
are synchronized.~point_array
(sensor_msgs/PointCloud2
):Input points to represent series of (u, v) image coordinate. Only x and y fields are used and the header frame_id is ignored. If
~synchronization
parameter is setTrue
,~points
and~point_array
are synchronized.
Publishing Topics¶
~output_point
(geometry_msgs/PointStamped
):The topic to be used to publish one point as a result of screenpoint.
~output
(sensor_msgs/PointCloud
):The topic to be used to publish series of points as a result of screenpoint.
~output_polygon
(geometry_msgs/PolygonStamped
):Projected points of
~rect
or~poly
.
Advertising Servicies¶
~screen_to_point
(jsk_pcl_ros::TransformScreenpoint
):ROS Service interface to convert (u, v) image coordinate into 3-D point.
The definition of
jsk_pcl_ros::TransformScreenpoint
is:
# screen point
float32 x
float32 y
---
# position in actual world
std_msgs/Header header
geometry_msgs/Point point
geometry_msgs/Vector3 vector
With int this service, the latest pointcloud acquired by ~points
is used to convert (u, v) into 3-D point.
Parameters¶
~synchronization
(Boolean, default:False
):If this parameter is set to
True
, the timestamps of 3-D pointcloud and the target point/rectangle/point array are synchronized.~approximate_sync
(Boolean, default:False
):If this parameter is set to
True
, approximate synchronization is enabled. This parameter is valid only when~synchronization
isTrue
.~queue_size
(Integer, default:1
):Queue length of subscribing topics.
~crop_size
(Integer, default:10
):The size of approximate region if
~points
pointcloud has nan holes.~search_size
(Integer, default:16
):Size to search normal of point cloud.
~timeout
(Double, default:3.0
):Timeout to wait for point cloud.