PATTERN FOR IDENTIFYING A LOCATION ON A SURFACE

摘要

Provided is a method (400) for determining a location on a surface (200) from an image of a region of said surface, said surface being divided into a plurality of cells (302; 304) arranged in a first direction and a second direction perpendicular to said first direction, each cell comprising a plurality of marks (202; 204; 206; 208), forming a pattern which uniquely identifies a cell, the method comprising: determining at least part of a boundary of a first cell from locations where marks of said plurality of marks are adjacent in with said first direction or said second direction (402); determining a location of said first cell from said pattern in said first cell (404).