viam.components.camera.camera
Classes
Camera represents any physical hardware that can capture frames. |
Module Contents
- class viam.components.camera.camera.Camera(name: str, *, logger: logging.Logger | None = None)[source]
Bases:
viam.components.component_base.ComponentBase
Camera represents any physical hardware that can capture frames.
This acts as an abstract base class for any drivers representing specific camera implementations. This cannot be used on its own. If the
__init__()
function is overridden, it must call thesuper().__init__()
function.from viam.components.camera import Camera
For more information, see Camera component.
- SUBTYPE: Final
The Subtype of the Resource
- Properties: TypeAlias = GetPropertiesResponse
- abstract get_image(mime_type: str = '', *, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) viam.media.video.ViamImage [source]
- Async:
Get the next image from the camera as a ViamImage. Be sure to close the image when finished.
NOTE: If the mime type is
image/vnd.viam.dep
you can useviam.media.video.ViamImage.bytes_to_depth_array()
to convert the data to a standard representation.from viam.media.video import CameraMimeType my_camera = Camera.from_robot(robot=machine, name="my_camera") # Assume "frame" has a mime_type of "image/vnd.viam.dep" frame = await my_camera.get_image(mime_type = CameraMimeType.VIAM_RAW_DEPTH) # Convert "frame" to a standard 2D image representation. # Remove the 1st 3x8 bytes and reshape the raw bytes to List[List[Int]]. standard_frame = frame.bytes_to_depth_array()
- Parameters:
mime_type (str) – The desired mime type of the image. This does not guarantee output type
- Returns:
The frame.
- Return type:
For more information, see Camera component.
- abstract get_images(*, timeout: float | None = None, **kwargs) Tuple[List[viam.media.video.NamedImage], viam.proto.common.ResponseMetadata] [source]
- Async:
Get simultaneous images from different imagers, along with associated metadata. This should not be used for getting a time series of images from the same imager.
my_camera = Camera.from_robot(robot=machine, name="my_camera") images, metadata = await my_camera.get_images() first_image = images[0] timestamp = metadata.captured_at
- Returns:
A tuple containing two values; the first [0] a list of images returned from the camera system, and the second [1] the metadata associated with this response.
- Return type:
Tuple[List[NamedImage], ResponseMetadata]
For more information, see Camera component.
- abstract get_point_cloud(*, extra: Dict[str, Any] | None = None, timeout: float | None = None, **kwargs) Tuple[bytes, str] [source]
- Async:
Get the next point cloud from the camera. This will be returned as bytes with a mimetype describing the structure of the data. The consumer of this call should encode the bytes into the formatted suggested by the mimetype.
To deserialize the returned information into a numpy array, use the Open3D library.
import numpy as np import open3d as o3d my_camera = Camera.from_robot(robot=machine, name="my_camera") data, _ = await my_camera.get_point_cloud() # write the point cloud into a temporary file with open("/tmp/pointcloud_data.pcd", "wb") as f: f.write(data) pcd = o3d.io.read_point_cloud("/tmp/pointcloud_data.pcd") points = np.asarray(pcd.points)
- Returns:
A tuple containing two values; the first [0] the pointcloud data, and the second [1] the mimetype of the pointcloud (for example, PCD).
- Return type:
Tuple[bytes, str]
For more information, see Camera component.
- abstract get_properties(*, timeout: float | None = None, **kwargs) Properties [source]
- Async:
Get the camera intrinsic parameters and camera distortion parameters
my_camera = Camera.from_robot(robot=machine, name="my_camera") properties = await my_camera.get_properties()
- Returns:
The properties of the camera.
- Return type:
For more information, see Camera component.
- classmethod from_robot(robot: viam.robot.client.RobotClient, name: str) typing_extensions.Self
Get the component named
name
from the provided robot.- Parameters:
robot (RobotClient) – The robot
name (str) – The name of the component
- Returns:
The component, if it exists on the robot
- Return type:
Self
- abstract do_command(command: Mapping[str, ValueTypes], *, timeout: float | None = None, **kwargs) Mapping[str, ValueTypes]
- Async:
Send/Receive arbitrary commands to the Resource
command = {"cmd": "test", "data1": 500} result = await component.do_command(command)
- Parameters:
command (Mapping[str, ValueTypes]) – The command to execute
- Raises:
NotImplementedError – Raised if the Resource does not support arbitrary commands
- Returns:
Result of the executed command
- Return type:
Mapping[str, ValueTypes]
- async get_geometries(*, extra: Dict[str, Any] | None = None, timeout: float | None = None) List[viam.proto.common.Geometry]
Get all geometries associated with the component, in their current configuration, in the frame of the component.
geometries = await component.get_geometries() if geometries: # Get the center of the first geometry print(f"Pose of the first geometry's centerpoint: {geometries[0].center}")
- Returns:
The geometries associated with the Component.
- Return type:
List[Geometry]
- classmethod get_resource_name(name: str) viam.proto.common.ResourceName
Get the ResourceName for this Resource with the given name
# Can be used with any resource, using an arm as an example my_arm_name = Arm.get_resource_name("my_arm")
- Parameters:
name (str) – The name of the Resource
- Returns:
The ResourceName of this Resource
- Return type:
- get_operation(kwargs: Mapping[str, Any]) viam.operations.Operation
Get the
Operation
associated with the currently running function.When writing custom resources, you should get the
Operation
by calling this function and check to see if it’s cancelled. If theOperation
is cancelled, then you can perform any necessary (terminating long running tasks, cleaning up connections, etc. ).- Parameters:
kwargs (Mapping[str, Any]) – The kwargs object containing the operation
- Returns:
The operation associated with this function
- Return type:
- async close()
Safely shut down the resource and prevent further use.
Close must be idempotent. Later configuration may allow a resource to be “open” again. If a resource does not want or need a close function, it is assumed that the resource does not need to return errors when future non-Close methods are called.
await component.close()