Nintendo Patents Watch

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Knowledge-based discourse

Calibrating AR Hanafuda

Nintendo Museum’s AR Hanafuda game requires projection calibration to align virtual imagery with the cards. However, the busy graphics and background make calibration difficult. Two solutions:

Official photo of the Nintendo Museum Hanafuda game, showing AR projection over a physical game board
  1. Comparing the game board image taken by an overhead camera to the reference game board image
Drawing from patent US20250317538: FIG. 5 illustrates a process of correcting a distortion of a taken image by associating a field coordinate system with a camera coordinate system
  1. Projecting procedurally generated polygons to the game board, and comparing their coordinates to the camera-captured polygons’ coordinates
Drawing from patent US20250317538: FIG. 9 illustrates a process of associating a projector coordinate system with the camera coordinate system

Previous patents for Nintendo Museum: Zapper & Scope SP, and Love Tester SP

[Originally posted on 2025-10-09 Pacific Time]