Multi-Projector System¶

Team G11 · Semester 2025

Contents

• Project Details
• Group Member
• UML Diagrams
• Codes
• Results

Project Overview¶

Issue: When two projectors cast images onto the same flat screen, the overlapping portion becomes brighter than the surrounding area, causing uneven illumination).
Method: Identify where the projections intersect and generate smoothly varying alpha masks so that each projector’s contribution transitions gradually across the shared zone)
Output: A lightweight, reproducible prototype using Python and OpenCV that demonstrates the blending behavior on static images).

Objectives¶

• Clarify the problem and choose an achievable solution strategy before starting development.
• Build an alpha-blending workflow and refine it until the overlap becomes visually uniform from a standard viewing distance.
• Test the approach using a controlled set of images, documenting parameters and results to ensure the experiment can be repeated.

*Success metric: the blended region should show no noticeable edge or brightness jump.

Scope & Operating Assumptions¶

• System setup: two projectors aligned toward a flat projection surface, with their optical axes roughly perpendicular to the screen.
• Content type: initial work focuses on still images, with possible extension to video later.
• Overlap shape: treated as a roughly rectangular band where the blending weights decrease linearly from one projector to the other.
• Calibration approach: prioritize simple, consistent procedures, introducing further correction only if visible imperfections remain.