CameraInfoSubscriber QML Type

Subscribes to sensor_msgs::msg::CameraInfo messages — This message defines meta information for a camera. It should be in a camera namespace on topic "camera_info" and accompanied by up to five image topics named:. More...

• List of all members, including inherited members

Properties

• binningX : uint32_t
• binningY : uint32_t
• d : list<double>
• distortionModel : string
• header : header
• height : uint32_t
• k : list<double>
• message : cameraInfo
• p : list<double>
• r : list<double>
• roi : regionOfInterest
• width : uint32_t

Signals

• messageReceived(cameraInfo msg)

Detailed Description

• image_raw - raw data from the camera driver, possibly Bayer encoded
• image - monochrome, distorted
• image_color - color, distorted
• image_rect - monochrome, rectified
• image_rect_color - color, rectified

The image_pipeline contains packages (image_proc, stereo_image_proc) for producing the four processed image topics from image_raw and camera_info. The meaning of the camera parameters are described in detail at http://www.ros.org/wiki/image_pipeline/CameraInfo.

The image_geometry package provides a user-friendly interface to common operations using this meta information. If you want to, e.g., project a 3d point into image coordinates, we strongly recommend using image_geometry.

If the camera is uncalibrated, the matrices D, K, R, P should be left zeroed out. In particular, clients may assume that K[0] == 0.0 indicates an uncalibrated camera.

Image acquisition info

CameraInfoSubscriber receives cameraInfo values from a ROS 2 topic. Set the topic and node properties, then connect to the messageReceived() signal.

See also CameraInfoPublisher and cameraInfo.

Property Documentation

binningX : uint32_t

The binningX field of the last received message. Updated whenever a new message arrives. binningXChanged is emitted on every update.

binningY : uint32_t

The binningY field of the last received message. Updated whenever a new message arrives. binningYChanged is emitted on every update.

d : list<double>

The d field of the last received message. Updated whenever a new message arrives. dChanged is emitted on every update.

distortionModel : string

The distortionModel field of the last received message. Updated whenever a new message arrives. distortionModelChanged is emitted on every update.

header : header

The header field of the last received message. Updated whenever a new message arrives. headerChanged is emitted on every update.

height : uint32_t

The height field of the last received message. Updated whenever a new message arrives. heightChanged is emitted on every update.

k : list<double>

The k field of the last received message. Updated whenever a new message arrives. kChanged is emitted on every update.

message : cameraInfo

The last message received on topic. Updated whenever a new message arrives.

p : list<double>

The p field of the last received message. Updated whenever a new message arrives. pChanged is emitted on every update.

r : list<double>

The r field of the last received message. Updated whenever a new message arrives. rChanged is emitted on every update.

roi : regionOfInterest

The roi field of the last received message. Updated whenever a new message arrives. roiChanged is emitted on every update.

width : uint32_t

The width field of the last received message. Updated whenever a new message arrives. widthChanged is emitted on every update.

Signal Documentation

messageReceived(cameraInfo msg)

Emitted when a new cameraInfo arrives on topic. msg contains the received value.