Chessboard pattern

A chessboard pattern consists of alternating light and dark squares, which together form a rectangular pattern. See chessboard example below with 4 x 8 intersections:

Requirements for the pattern

• The pattern should be applied to a surface that is as flat as possible (planar), e.g. a glass pane.
• The light and dark squares must
• be arranged in an alternating pattern,
• have the same size
• and be square.
• A pattern must contain at least 16 fully visible squares, which together form at least 3 x 3 intersections.
• The background color around the pattern must form a 'quiet zone'.

Requirements for the image acquisition

• Exposure
• Homogeneous illumination of the pattern
• Good contrast between the light and dark squares in the image
• No opening at intersections due to overexposure
• Figure
• A square must be represented by at least 15x15 pixels.

Configuration in the Camera Calibration Assistant

• Width
  Corresponds to the number of intersections in horizontal direction.
• Height
  Corresponds to the number of intersection points in vertical direction.
• Distance x
  Corresponds to the distance between two intersection points in horizontal direction.
• Distance y
  Corresponds to the distance between two intersection points in vertical direction.