ComfyUI Node: Camera Pose Visualizer

Camera Pose Visualizer:

The CameraPoseVisualizer node is designed to help you visualize camera poses in a 3D plot, making it easier to understand and analyze camera movements and orientations. This node can process camera pose data from either an Animatediff-Evolved CameraCtrl Pose or a .txt file containing RealEstate camera intrinsics and coordinates. By converting this data into a visual format, the node provides a clear and intuitive representation of camera positions and orientations over time, which is particularly useful for tasks involving 3D scene reconstruction, animation, and camera path planning. The visualization includes a color-coded timeline, enhancing the ability to track changes and transitions in camera poses.

Camera Pose Visualizer Input Parameters:

pose_file_path

This parameter specifies the path to a .txt file containing camera intrinsics and coordinates. If provided, the node will read the camera poses from this file. The default value is an empty string, meaning no file is specified. This parameter is essential if you are not using the cameractrl_poses parameter.

base_xval

This parameter sets the base x-value for the visualization. It controls the initial position of the camera poses along the x-axis in the 3D plot. The default value is 0.2, with a minimum of 0 and a maximum of 100, adjustable in steps of 0.01. Adjusting this value can help in positioning the visualization within the plot space.

zval

This parameter sets the z-value for the visualization, which affects the depth positioning of the camera poses in the 3D plot. The default value is 0.3, with a minimum of 0 and a maximum of 100, adjustable in steps of 0.01. This value is particularly useful for controlling the vertical placement of the camera poses.

scale

This parameter determines the scale of the visualization, affecting the overall size of the plotted camera poses. The default value is 1.0, with a minimum of 0.01 and a maximum of 10.0, adjustable in steps of 0.01. Scaling can help in fitting the visualization within the desired plot area or emphasizing certain aspects of the camera poses.

use_exact_fx

This boolean parameter indicates whether to use the exact focal length (fx) values from the camera poses. The default value is False. When set to True, the node will use the exact fx values, which can provide a more accurate representation of the camera's field of view.

relative_c2w

This boolean parameter specifies whether to use relative camera-to-world (c2w) transformations. The default value is True. When enabled, the node will compute relative transformations, which can be useful for visualizing incremental changes in camera poses.

use_viewer

This boolean parameter determines whether to use an interactive viewer for the visualization. The default value is False. Enabling this option allows for a more interactive exploration of the 3D plot, which can be beneficial for detailed analysis.

cameractrl_poses

This optional parameter allows you to provide camera poses directly as a list of CameraCtrl poses. If specified, the node will use these poses instead of reading from a file. This parameter is useful for dynamic or programmatically generated camera poses.

Camera Pose Visualizer Output Parameters:

IMAGE

The output of the CameraPoseVisualizer node is an image representing the 3D plot of the camera poses. This visual output provides a clear and intuitive representation of the camera positions and orientations over time, aiding in the analysis and understanding of camera movements.

Camera Pose Visualizer Usage Tips:

• Ensure that either pose_file_path or cameractrl_poses is provided to avoid errors.
• Adjust the scale parameter to fit the visualization within the desired plot area.
• Use the use_exact_fx parameter for a more accurate representation of the camera's field of view.
• Enable use_viewer for an interactive exploration of the 3D plot, which can be particularly useful for detailed analysis.

Camera Pose Visualizer Common Errors and Solutions:

Please provide either pose_file_path or cameractrl_poses

• Explanation: This error occurs when neither pose_file_path nor cameractrl_poses is provided.
• Solution: Ensure that you specify either a valid pose_file_path or provide cameractrl_poses to the node.

Invalid file format or content in pose_file_path

• Explanation: This error occurs when the specified pose_file_path does not contain valid camera pose data.
• Solution: Verify that the file at pose_file_path contains correctly formatted camera intrinsics and coordinates.

ValueError: could not convert string to float

• Explanation: This error occurs when the node encounters non-numeric values in the pose data.
• Solution: Check the pose data file for any non-numeric values and correct them to ensure all values are numeric.

IndexError: list index out of range

• Explanation: This error occurs when the node tries to access an index that does not exist in the pose data.
• Solution: Ensure that the pose data file is correctly formatted and contains the expected number of values per line.