Calibration Module¶

Purpose¶

The calibration module maps the physical projection surface to digital coordinates in Unity.

Why Calibration is Required¶

Since the game is projected onto a real surface, alignment is necessary to ensure: - Accurate hit detection - Proper object placement - Minimal distortion

Calibration Process¶

Surface Boundary Detection Acquire camera frames and apply computer-vision techniques to identify and segment physical surface boundaries.
Coordinate Space Transformation Convert detected image-space coordinates into Unity world-space coordinates using a calibrated homography and camera intrinsic parameters.
Projection Alignment Optimization Refine projector pose and orientation to minimize spatial error between virtual content and physical surfaces, ensuring pixel-accurate alignment.
Interaction Accuracy Verification Validate end-to-end system precision by measuring positional error between expected and observed interaction points, confirming calibration integrity.

Challenges Faced¶

Lighting variation
Surface irregularities
Camera distortion