By Ritik Jalisatgi & Alex Mehta

What is Theia?

Theia is a device that assists blind individuals by communicating surroundings through audio patterns


Spatial Communication (Click to play)

Object Communication (Click to play)

Why is Theia needed?

Theia is needed because it's unique and effective

Theia wearable-implementation

The majority of blind-assistant devices communicate large amounts of information badly since they heavily rely on verbal descriptions which are slow. Due to this, Theia relies on sound effects / audio patterns too which can be processed way more quickly

How does Theia work?

Theia runs on a Raspberry PI 4 and uses the Realsense D415 camera to recieve input, then algorithms (detailed in our research-paper) are used to convert the data to audio cues

Input Image


Nearest-neighbor downsampling

Convert depth-data to sound

Play sound in specific order

The user then hears the audio through their headphones and can use the audio cues to understand their environment

Where is the research on Theia?

The seminal research paper on Theia is Help the Blind See: Assistance for the Visually Impaired through Augmented Acoustic Simulation which provides an introduction and first iteration of Theia.

Our second paper, Theia: Assistive Environmental Communication via Audio Patterns for the Visually Impaired has the human-trials done on Theia, and a detailed explanation about the process and new knowledge gained from Theia. It also provides a new version that utilizes deep learning techniques.

Who made Theia?

Theia was made by Ritik Jalisatgi and Alex Mehta, the code is open-source and you may find the community through its github-repository!

You may also contact the creators through email

[email protected]
alex at

Or through Discord