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James Brown

The VK-Pocket. When you look at it, it looks back at you with your own eyes.

The eye on the screen is a live view. The black dot to the left is a wide angle high resolution camera; it performs face detection and crops the eye region for display, wherever it is in the frame.

2 May 2022 at 3:41 | Open on mastodon.social
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James Brown

It uses a miniature CRT scavenged from a tip shop camcorder, and a Raspberry Pi Zero to run it all. There's a little servo to move the bellows.

A view of the VK-Pocket with the top removed, showing the layout inside - a Pi Zero, a small servo, the CRT, and the CRT drive board. It all fits in the palm of a hand.
2 May 2022 at 3:44 | Open on mastodon.social
James Brown

The Pi Zero manages the eye tracking at one or two frames per second on its CPU, but its graphics hardware is capable of streaming and cropping a high resolution video feed at realtime rates in parallel with that.
The excellent picamera library provided the level of control needed to do this.

2 May 2022 at 3:53 | Open on mastodon.social
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