Multi-projection fusion system for special-shaped metal screen

Curved metal projection screens are widely used in various places such as theme parks, museums, and art galleries due to their ability to produce highly immersive 3D stereoscopic projection effects. They have also become important interactive devices for constructing projection-based virtual reality systems. However, because metal screens have non-Lambertian reflection characteristics and the normal direction on the curved screen changes significantly, the brightness of the image seen by viewers at different positions varies remarkably. Traditional brightness fusion algorithms can only achieve brightness fusion from a single viewing angle, maintaining consistent brightness of the projected image under that single angle but fail to handle the significant changes in image brightness when viewers move during viewing. To address this issue, this paper proposes a multi-projection fusion system for large special-shaped metal screens. This system can not only effectively correct the geometric distortion of images on special-shaped metal screens but also perform real-time brightness fusion of the projected images according to the user’s position. As a result, users can always see images with consistent brightness during mobile viewing, effectively enhancing the sense of reality and immersive experience.