31. December 2011 23:11
Back in my bike-racing days, on the rare occasions when I got through tight corners perfectly, I would wonder afterwards what kind of G-forces I was pulling through the turn. Back then, accelerometers were the province of engineering, not bicycle racers. Today, of course, accelerometers are found in numerous consumer devices, including every modern smartphone. Smartphones also contain Global Positioning System (GPS) receivers capable of measuring location and speed, and typically contain compasses to detect direction.
AntiMap is an Open Source project designed to make use of the data that smartphones can register. The AntiMap Log app is available for iOS and Android devices. This tool records GPS and accelerometer data for visualization and analysis later.
There are currently two tools for visualization. The AntiMap project combined HTML 5 and Processing.js to create a Web demo capable of automatically displaying recorded data in a Web browser. By "automatically", I mean "able to create a data visualization without human input.". It's still necessary to get the data from the cekk phone to a computer.
The second tool generates simple graphic widgets of the data, in a format that can be merged with video. An example of this can be seen at http://vimeo.com/27648004 - the AntiMap data has been turned into small graphics and merged into the corners of video recorded while snowboarding (probably from a helmet cam). The AntiMap Video application (which composits the graphics with the video) is only available for Macs (a Windows version is in the works).