17551825. EXTRACTING TRAJECTORIES FROM ARROW PICTOGRAMS simplified abstract (INTERNATIONAL BUSINESS MACHINES CORPORATION)

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EXTRACTING TRAJECTORIES FROM ARROW PICTOGRAMS

Organization Name

INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor(s)

JAYAKORN Vongkulbhisal of Tokyo (JP)

PABLO SALVADOR Loyola Heufemann of Tokyo (JP)

EXTRACTING TRAJECTORIES FROM ARROW PICTOGRAMS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17551825 titled 'EXTRACTING TRAJECTORIES FROM ARROW PICTOGRAMS

Simplified Explanation

The patent application describes a method for extracting the trajectory of an arrow in a binary image. The method involves the following steps:

  • Extracting a skeleton of the arrow in the image.
  • Splitting the skeleton into bones.
  • Extending each bone to reach a border of the arrow, creating an extended bone.
  • Warping the extended bone into a straight line using a thin plate spline.
  • Warping the binary image into a warped image using the same thin plate spline as used for the extended bone.
  • Selecting a component that includes the center point of the warped image for each bone.
  • Computing a symmetric error of the selected component.
  • Selecting the bone with the lowest symmetric error as the trajectory of the arrow.

Potential applications of this technology include:

  • Computer vision systems for tracking and analyzing arrow trajectories in sports such as archery or darts.
  • Augmented reality applications that overlay virtual arrows onto real-world scenes.

Problems solved by this technology:

  • Accurately extracting the trajectory of an arrow from a binary image, even in cases where the arrow may be partially obscured or distorted.
  • Efficiently analyzing and tracking arrow trajectories in real-time.

Benefits of this technology:

  • Improved accuracy in tracking arrow trajectories, leading to more precise analysis and feedback for athletes.
  • Enhanced visual effects and realism in augmented reality applications involving arrows.
  • Time and cost savings compared to manual tracking and analysis of arrow trajectories.


Original Abstract Submitted

A method extracts a trajectory of an arrow in a binary image. The method extracts a skeleton of an arrow in the image and splits the skeleton into bones. For each of the bones, the method extends a bone to obtain an extended bone having both ends of the bone reaching a border of the arrow, and warps the extended bone into a straight line using a thin plate spline. For each bone, the method warps the binary image into a warped image using a thin plate spline with same parameters as the thin plate spline used to warp the extended bone into the straight line. For each bone, the method selects a component that includes a center point of the warped image, computes a symmetric error of the selected component, and selects, as the trajectory of the arrow, a bone where the selected component has the lowest symmetric error.

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