Point light source generation for computer-generated holograms using WebGL: effects of camera alignment and depth...

In the field of computer-generated holography (CGH), interference fringes are numerically calculated to reconstruct three-dimensional images. The point light source method, which requires the generation of 3D point cloud data, is widely adopted due to its computational simplicity. Previous studies by our group have explored various techniques for generating point clouds, including OpenGL- and Unity-based systems capable of producing photorealistic data. However, these systems required locally installed software, limiting accessibility. To overcome this limitation, we developed a WebGL-based application that enables users to generate point light sources directly through a web browser, without installation. The proposed system supports the generation of point cloud data from multiple viewpoints, which is essential for high-resolution and wide-viewing-angle CGH. This paper also presents verification results for two camera alignment methods and two depth measurement approaches, discussing their respective advantages and disadvantages.