Hardware and Calibration
Calibrating the Reactable Live!
The Reactable Live! is based on Computer Vision and Backprojection technology. Setting up the hardware of the Reactable Live! involves calibrating it in order to get the best possible results.
Calibrating the Projection System
Standard CalibrationThere are 2 ways to calibrate the system. Normally you would only need the Standard calibration, accessible in the Setup menu - Calibration or with the keyboard shortcut "Cmd-c". The calibration works in 2 steps. First you have to center the project by aligning a circle with the outer border of the screen. The second step is fine-tuning by placing a cube onto the 5 squares on the table. Just follow the instructions given on the screen.
Advanced CalibrationThe advanced calibration is only necessary if the circle in the standard calibration is distorted. Normally you need to do it only the first time you setup the table. It can be accessed through the menu or the keyboard combination "Cmd-a". In this mode you have to point 4 arrows to 4 points on the edge of the Reactable screen (top, bottom, left and right axes). The rest is equivalent to the standard calibration mode.
Watch a video about calibration.
Computer Vision (Reactivision)
The Reactable Live! comes with reasonable default values for the computer vision setup, so if in doubt, best is to leave them as they are and try to improve the lighting conditions. Anyhow, if this is not possible or if there are any other problems you have access to the advanced settings of the computer vision system
Start the Reactable Live! and in the menu go to "Settings"->"Show Reactivision". A window appears which shows the Reactable as seen by the camera in the Reactable core. You have 3 different views, the source view, threshold and finger threshold.