C Specification

The XrMarkerDetectorCornerRefineMethodML enumeration is defined as:

// Provided by XR_ML_marker_understanding
typedef enum XrMarkerDetectorCornerRefineMethodML {
    XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_NONE_ML = 0,
    XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_SUBPIX_ML = 1,
    XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_CONTOUR_ML = 2,
    XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_APRIL_TAG_ML = 3,
    XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_MAX_ENUM_ML = 0x7FFFFFFF
} XrMarkerDetectorCornerRefineMethodML;

Description

The ArUco/AprilTag detector comes with several corner refinement methods. Choosing the right corner refinement method has an impact on the accuracy and speed trade-off that comes with each detection pipeline.

Enumerant Descriptions

  • XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_NONE_ML — No refinement. Inaccurate corners.

  • XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_SUBPIX_ML — Subpixel refinement. Corners have subpixel coordinates. High detection rate, very fast, reasonable accuracy.

  • XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_CONTOUR_ML — Contour refinement. High detection rate, fast, reasonable accuracy.

  • XR_MARKER_DETECTOR_CORNER_REFINE_METHOD_APRIL_TAG_ML — AprilTag refinement. Reasonable detection rate, slowest, but very accurate. Only valid with AprilTags.

See Also

XR_ML_marker_understanding, XrMarkerDetectorCustomProfileInfoML

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2024, The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.