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Conventions

Image coordinate system​

The same coordinate system as in OpenCv is used. So an image is treated as a matrix. The x-axis increases to the right and the y-axis increases while moving downwards in the coordinate system, as in matrix notation.

Annotations​

All annotations are defined relative to the image. See also lost.db.model.TwoDAnno.

Bounding Box definition​

  • x: Defines the x-coordinate of the center of a bounding box (relative, in pixels).
  • y: Defines the y-coordinate of the center of a bounding box (relative, in pixels).
  • width: Defines the width of a bbox (relative, in pixels).
  • height: Defines the height of a bbox (relative, in pixels).