Third Eye – Design

We wanted the design of Third Eye to be as robust, scalable and cost effective as possible. Here are the specifications:

1.Smartphone

The helmet has a space dedicated for smartphones. Smartphones come bundled with several sensors like cameras, mic, accelerometer and gyroscope. The device capabilities largely depends on these sensors. The smartphone runs on Android OS which has a large repository of applications and their tutorials available online. This also allows new applications to be developed in an easy way.

2.Raspberry Pi

The Raspberry Pi  is an ultra-low-cost credit-card sized Linux computer. It has been used to create a multi-view egocentric video feed by connecting it to multiple R-pi cameras via an adaptor module. Instead of using multiple smartphones to capture the multi view egocentric video feed, the low cost Raspberry Pi computer has been used which not only reduces the overall cost of the helmet but also the weight of the helmet.

3.Raspberrypi Cameras

Three of these low cost cameras have been used to capture the left, right and the back video feed. Since the Rpi module offers only a single port for the Rpi camera, an Rpi adaptor module has been used to connect multiple cameras. USB web cameras, which could have been a cheaper alternative, have not been used since there is no GPU assistance available on the USB ports. This means lower frame rates ie… 640×480 at 10fps for a single camera as compared to 1080p @ 30fps captured using an Rpi camera.

 

 

Estimated Hardware Cost

 

Item Estimated Cost
USD INR
Smartphone (Redmi 3S) 110 7000
Raspberry Pi 3 (Description) 35 2500
Camera module (Description) 25 1700
IR camera module (Description) 30 2000
Multi camera adapter (Description) 50 3400
Power Bank (10K mAh) 15 1000
Total (with 3 extra camera modules + IR) 315 21000