Border Tracking

Sinden-style aiming from a drawn screen border with no LEDs, and what an open version would take.

Firearms

Border Tracking · Deep Dive

Border Tracking

The screen itself becomes the marker.

Sinden-style aiming from a drawn screen border with no LEDs, and what an open version would take.

Photo: Operation Wolf on a widescreen monitor with the Sinden white border drawn round the screen by Damien McFerran / Time Extension

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    Volumes

    1. Vol 1 How Border Tracking Works — A Camera That Sees the Whole Screen The Sinden method from what Sinden itself publishes: a visible-light camera in the muzzle, a white frame drawn round the picture, and a host computer that does all the seeing
    2. Vol 2 The Image Pipeline — Colour Match, Rectangle, Corners and the Mapping What the host does with each camera frame, from Sinden's own settings and source-level reading of the open projects, and whether a microcontroller in the gun could do the same job
    3. Vol 3 Geometry — Border Width, Screen Size and Distance, Worked Why the ratio of distance to screen width matters more than either, how many camera pixels a 2 % border really is, and what one camera pixel is worth on the screen
    4. Vol 4 Latency — From Exposure to Cursor, and How to Measure It What Sinden claims, what the software's own counters show, what each stage costs in principle, how the MiSTer's low-power modes trade latency for processor time, and a bench method for the ADP3450
    5. Vol 5 Displays — Brightness, Lost Picture, Overscan, HDR, Dimming and Burn-In A border tracker turns the television into part of the sensor. What that asks of the set, what the border takes from the picture, and the display features that quietly work against it
    6. Vol 6 Drawing the Border — Overlays, Emulators, Shaders, Scalers and FPGA Cores The border must be on the panel whenever the gun is used. The four places it can be drawn, what each costs, and the settings that make each one work
    7. Vol 7 Ambient Light, Failure Modes and Keeping It Working Why a visible-light tracker is at the mercy of the room, how each failure shows up in the raw and processed views, and the maintenance and repair a border gun needs: camera modules, IDs, firmware, USB power and the host
    8. Vol 8 Open Alternatives, and Border Against Infrared for This Build What exists in the open, how an open border gun would have to be built, and why the reference design uses infrared emitters, with the reasons each way and a cheap bench trial that would test them