Methods for spatial calibration of vehicle ADAS service system

A method for calibrating an optical projector to align projected indicia with a selected spatial location within an operative field of view of the optical projector, comprising:

• determining a spatial relationship between a projection axis of the optical projector and a plurality of reference targets located within a first portion of said operative field of view of the optical projector;
• for each of said plurality of reference targets, determining an associated orientation of said projection axis which aligns said projected indicia with said reference target;
• and
• using said determined orientations of said projection axis to establish a transform between said projection axis orientations and a spatial location of each reference target within a common frame of reference.

A method for calibrating a projection axis of an optical projector mounted to a vehicle inspection system support structure, comprising:

• disposing a calibration fixture within a field of illumination for said optical projector, said calibration fixture including at least one optical target and at least one reference target;
• observing said calibration fixture with an optical camera system of said vehicle inspection system to acquire image data representative of a spatial relationship between said vehicle inspection system and said calibration fixture;
• processing said acquired image data to determining a spatial relationship between said optical projector and said at least one reference target;
• altering a spatial orientation of said optical projector to project a visible indicia towards said at least one reference target;
• responsive to an observed misalignment between said projected visible indicia and said at least one reference target, refining either said spatial orientation of said optical projector, or a placement of said calibration fixture, until said observed misalignment falls within an acceptable accuracy threshold;
• and
• storing data representative of a relationship between said optical projector orientation and a location of said at least one reference target once said observed misalignment is within said acceptable accuracy threshold.