Multi-color Holograms Improve Brightness in Holographic Displays

Koray Kavaklı, Liang Shi, Hakan Ürey, Wojciech Matusik, and Kaan Akşit

[Website]

Description

Holographic displays generate Three-Dimensional (3D) images by displaying single-color holograms time-sequentially, each lit by a single-color light source. However, representing each color one by one limits brightness in holographic displays.

This paper introduces a new driving scheme for realizing brighter images in holographic displays. Unlike the conventional driving scheme, our method utilizes three light sources to illuminate each displayed hologram simultaneously at various intensity levels. We co-optimize multi-color holograms and required intensity levels from each light source using a gradient descent-based optimizer with a combination of application-specific loss terms. We experimentally demonstrate that our method can increase the intensity levels in holographic displays up to three times, reaching a broader range and unlocking new potentials for perceptual realism in holographic displays.

Citation

If you find this repository useful for your research, please consider citing our work using the BibTeX entry in the project website.

Getting started

This repository contains a code base for calculating holograms that can be used to generate higher dynamic range holograms. These holograms are calculated such that they can be illuminated with multiple wavelengths.

(0) Requirements

You can clone our codebase by typing:

git clone git@github.com:complight/multicolor.git

To install the required dependencies, navigate into the project directory and run:

cd multicolor
pip3 install -r requirements.txt

If the requirements.txt installation fails (often due to odak updates), try installing odak directly:

pip3 install odak

(1) Runtime

Once you have the main dependency installed, you can run the code base using the default settings by providing the below syntax:

python3 main.py

(2) Reconfiguring the code for your needs

Please consult the settings file found in settings/jasper_multi_color.json, which contains self-descriptive variables that you can modify.

If you want to use a different settings file:

python3 main.py --settings settings/jasper_multi_color.json

If you are looking into finding more sample images, consider visiting our images repository.

Support

For more support regarding the code base, please use the issues section of this repository to raise issues and questions.