http://arstechnica.com/gadgets/2013/01/17000-linux-powered-rifle-brings-auto-aim-to-the-real-world/
Few snips to give the gist of the article
Few snips to give the gist of the article
The image displayed on the scope isn't a direct visual, but rather a video image taken through the scope's objective lens. The Linux-powered scope produces a display that looks something like the heads-up display you'd see sitting in the cockpit of a fighter jet, showing the weapon's compass orientation, cant, and incline. To shoot at something, you first "mark" it using a button near the trigger. Marking a target illuminates it with the tracking scope's built-in laser, and the target gains a pip in the scope's display. When a target is marked, the tracking scope takes into account the range of the target, the ambient temperature and humidity, the age of the barrel, and a whole boatload of other parameters. It quickly reorients the display so the crosshairs in the center accurately show where the round will go.