Multi-Projector System — Project Wiki¶

Overview¶

Our goal is to build a two‑projector system that displays seamless still images on a flat screen, where the projected areas overlap and must be blended. Implementation is in Python (OpenCV). Prior to implementation, we document the problem and a viable solution approach.

Problem background (why blending matters)
Overlapped regions become over‑illuminated; alpha‑blending with proper masks evens illumination across seams. (“What is Alpha‑blending?”)

Scope & assumptions

• Start from a planar screen with two projectors; optical axes perpendicular to the screen.
• Work with still images first (not video).
• Expected overlapped area is approximately rectangular; target a linear drop of mask intensity from 1→0 across the overlap.
• Use Python + OpenCV; iterate from simple to refined.
  (From project brief and simplified requirements.)

Objectives

• Describe the problem and identify a potential solution before coding.
• Apply geometric reasoning (lines/planes in 3D; ray‑plane/ray‑cylinder intersections) as needed.
• Prototype masking that yields smooth, artifact‑free blending.
  (From “Objective”, “Skills required”, and problem formulation.)

Key concepts & references

• Alpha‑blending — concept and examples.
• Forward (screen→projector) and inverse (projector→screen) ray tracing for overlap detection and mask generation.
• “Smooth” masks prevent scratches along mask boundaries.

Team & roles

Roles	Members
Advisor	Great Gilbert Soco
PL, Project Leader	Koki Hamamura
PM, Project Manager	Noah Larson
Redmine – supporter of PM	Nonoka Ohama
Developers	Deng, Great Gilbert Soco
Doxygen Leader	Haziq Bin Airol Hairrie Amirul
Doxygen, commenters	Jordan Keiwein Lay, Hnin Ei Shwe Yee
Wiki Leader	Phillip Anderson
Wiki Developers	Wing Sum Tang, Sota Yatsugi
Jira Research Team	Zhi Jie Yew, Phillip Anderson

Project links

• Requirements & assumptions: this page, sections Scope & Assumptions and Objectives.
• Design notes & diagrams:
• Experiments log & photos:
• Code repo / file list:

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