+++ title = “A Feat” description = “Project OPTHA: replacing a vendor’s e-ink rasterization pipeline” date = 2026-11-01 +++
A Feat
Project OPTHA
GMP-PS-2022-A
Note: Preliminary pass from ~/Downloads/optha.pdf (the 2022 two-page study). This looks like the Soofa image platform from the CV (50%+ per-device cost cut, vendor artifacting, FlexBox/Grid). Confirm before naming Soofa on a slide.
The Statement
A wholesale replacement of a 3rd-party vendor’s web-based e-ink rasterization pipeline
Visualized with Phoenix LiveView
The Motive
- The vendor platform was effectively deprecated
- Web support on par with 2012 Safari
- Visual corruption in the renders
- No history, only a “live” view
- Per-device costs, for that level of support
The Requirements
- Long-term platform support
- Modern layout: Grid & Flexbox
- Historical playback of rasters
- Lower per-device cost
- Less load on the vendor, to negotiate rates down
The Implementation
- A containerized browser fleet, driven by RabbitMQ
- Queued via API by the existing systems
- Post-processing (8bGr) and quantization for storage
- A GenServer per field device
- LiveView for the fleet and each device’s history
–
The Result
50%
lower per-device cost
Architecture
–
Render
- The existing app asks for new imagery
- Queue API & timers feed one render queue
- Per-resolution renderers, one per device generation
–
Track
- One GenServer per device
- The source of truth for device status
- Published over Phoenix PubSub
–
Keep
- Rasters quantized for long-term storage
- Image histograms along the way
- ~96% smaller on average
Fleet Visualizer
–
Fleet Visualizer
- Real-time, every device at once
- Sort by newest raster or name
- Filter by label or region
- Border colour shows raster age
- Pause to stop the live updates
History Viewer
–
History Viewer
- Watch one device live, or pause
- Page back in time, indefinitely
- Keyboard shortcuts, deep links to a moment
- The device’s sync state, for field issues
- Fit-to-screen or 1:1
The Study
