Method and apparatus for precise determination of a position of a target on a surface

An apparatus for determining a location of a target on a surface, the surface having a plurality of fixed reference points located proximally thereabout, the apparatus comprising:

• a registration control for registering particular ones of the plurality of fixed reference points;
• an imager for capturing at least a first image and a second image of the target, each of the first image and the second image being a photographic image, the first image and the second image each showing the target together with particular ones of the plurality of fixed reference points;
• and
• a processor, for executing computer program instructions stored in a memory, which when executed by the processor, cause the processor to perform operations comprising:
• determining the location of the target based on the first image and the second image by:
• identifying, from the particular ones of the plurality of fixed reference points, a set of fixed reference points that are included in both the first image and the second image;
• and
• using the set of fixed reference points to determine the location of the target.

A non-transitory computer-readable medium storing computer program instructions for determining a location of a target on a surface, the surface having a plurality of fixed reference points located proximally thereabout, which when executed on a processor, cause the processor to perform operations comprising:

• capturing, from a camera, at least a first image and a second image of the target, each of the first image and the second image being a photographic image, the first image and the second image each showing the target together with particular ones of the plurality of fixed reference points;
• and
• determining the location of the target based on the first image and the second image by:
• identifying, from the particular ones of the plurality of fixed reference points, a set of fixed reference points that are included in both the first image and the second image;
• and
• using the set of fixed reference points to determine the location of the target;
• and
• displaying the location of the target.