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Color seamlessness in multi-projector displays using constrained gamut morphing.

Behzad Sajadi¹, Maxim Lazarov, Aditi Majumder

¹Computer Science Department, University of California, Irvine, CA, USA. bsajadi@uci.edu

IEEE Transactions on Visualization and Computer Graphics

|October 17, 2009

Summary

This study introduces a novel constrained gamut morphing algorithm to eliminate color variations in multi-projector displays. The method ensures true color seamlessness and visually pleasing C1 continuity across displays, making projector boundaries imperceptible.

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Area of Science:

Computer Vision
Image Processing
Display Technology

Background:

Multi-projector displays suffer from spatial color variations due to projector differences, vignetting, and overlaps.
These variations lead to a non-uniform color gamut and visible seams across the display.

Purpose of the Study:

To develop a constrained gamut morphing algorithm for seamless color transitions in tiled multi-projector displays.
To achieve true color seamlessness and C1 continuity across displays, regardless of projector type or display geometry.

Main Methods:

A novel constrained gamut morphing algorithm is proposed, adjusting pixel light intensities for smooth transitions in overlap regions.
Precise constraints on perceptual differences between adjacent pixel gamuts are imposed.
The algorithm ensures C1 continuity for visually pleasing results.

Main Results:

The method successfully removes spatial color variations and achieves true color seamlessness on planar and curved displays.
Demonstrated scalability, efficiency, and automatic operation.
Real-time performance achieved using Graphics Processing Units (GPUs) for interactive applications.

Conclusions:

The developed algorithm provides a scalable, perception-based solution for seamless multi-projector displays.
This is the first method to realize truly seamless displays where projector boundaries are undetectable.
The approach is effective for both low and high-end projectors and various display configurations.