Added face rotation to the INSPEC firmware in 1.3.9, so REM detection also works when your head lies sideways in the frame.
The Pixel Range used to set how many changed pixels in a row count as movement. It now counts changed pixels in connected groups in any direction, which detects more subtle eye movements in all directions. It also more sensitive now, so the Pixel Range needs be increased from 6 to 12 to filter out background noise.
A new eye bursts function now counts an eye movement only when another one occurred within the 2.5 seconds before it. This helps to keep the artifact filter from filtering out valid eye movements when too much of the body is in the frame and breathing patterns cause repetitive motion signals.
