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| Since | 20.5 |
This node takes in a set of points and prepares the keypoint metadata to be exported to the COCO JSON file by the 
Labs ML CV ROP Annotation Output SOP.
Note
Each input point must have a unique string attribute kp_name. (The prefix kp stands for keypoint.)
The original ML Computer Vision tools were developed by the Synthetic Data team at Endava PLC.
パラメータ ¶
Render ¶
Camera LOP Path
The path to the LOP node from which the camera primitive is sourced.
Camera Primitive
The USD primitive path that points to the camera, used for obtaining screen space coordinates of the keypoints.
Camera Resolution
The camera resolution. Defaults to @res, a PDG attribute created by the Labs ML CV ROP Synthetic Data TOP.
Compute Ground Truth
Enables the calculation of ground truth for keypoint positions (both screen-space and global). This is useful when separating this node’s functions and computing ground truth further downstream.
Include Keypoint 3D Metadata
Adds keypoint 3D Metadata to the COCO JSON file exported by the Labs ML CV ROP Annotation Output SOP.
Skeleton Metadata ¶
Include Skeleton Connectivity
Enables the creation of the skeleton connectivity map. This connectivity is used to optionally generate a skeleton from keypoints and is useful for visualizing results within the ML training pipeline.
Visualize Connectivity
Enables the creation of edges between skeleton points that will be connected in the Ground Truth, allowing preview of this connectivity in the Houdini viewport.
Skeleton Connections
The list of ordered pair point connections separated by commas, for example: [0,1],[1,2].
Add Connections
Creates the connections multiparm from the Skeleton Connections parameter and input points.
Connections
The number of skeleton connections.
Skeletons ¶
Connection
The ordered pair for defining the skeleton connection.
Skeleton Weight
The importance of the skeleton link between keypoints.
Skeleton Color
The color of the skeleton connection. (This is not visualized in the Houdini viewport).
Keypoint Metadata ¶
Assign Keypoint Metadata
Enables the creation of keypoint metadata by this node.
Assign Point Colors
Enables the assignment of colors to the keypoints.
Add Input Keys
Generates the Keypoints multiparm based on the input points.
Keypoints
The number of keypoints.
Keypoints ¶
Keypoint ID
The index of the keypoint. This number cannot be 0. The ID value defaults to the point number plus 1.
Keypoint Name
The name of the keypoint, initially set by the attribute kp_name.
Keypoint Sigma
The weight used in the Object Keypoint Similarity (OKS) calculation during evaluation, adjusted to indicate the expected precision of the model.
Keypoint Color
The color of the Keypoint for ML visualization
Keypoint Type
Defines the type of the keypoint, used for grouping multiple keypoints. For example, all keypoints of a left hand would have the type 'hand'.
Swapable
Specifies the mirror point for each keypoint, if one exists (e.g., 'elbow_left', 'elbow_right'). This is useful for data augmentation when flipping the image horizontally.
Examples ¶
Tip
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| See also |
