I have been getting better results with a different night-vision camera with built-in infrared lights and zoom:
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Category: Halovision
Finally have the standalone version ready for some test runs on my beautiful wife!
Weeded out some more false negatives – if there is a large movement, it waits 10 seconds before counting eye movements again.
Tweaked the algorithm to weed out some more false negatives.
Improved the algorithm… it was missing REM episodes where the eye movements stopped for more than 5 seconds before the stairway to heaven was reached.
Episodes like in the following minute, where there is a 10 second break in eye movements around the 30 second mark, will now keep counting and trigger the audio tracks:
Episodes like in the following minute, where there is a 10 second break in eye movements around the 30 second mark, will now keep counting and trigger the audio tracks:
Ensured that the video feed is always top-most.
Added an option for halovision devices where the headband used to be listed and the webcams / built-in cameras are listed.
Made the stairway to heaven shorter again, the REM detection should be almost perfect now.
Made the stairway longer to climb, but faster. This makes it more likely to trigger on rapid eye movements and less likely to trigger when settling down for the night. And added an extra filter to discard small movements that are within a second of large movements, as the ignore filter was sometimes being bypassed by small movements in the wake of large movements.
Michael of Lucid Code has refined his own REM detection system project known as Halovision which is great news for us interested in sleep and dream research.
The device measures subtle electrooculography (EOG) muscle changes by means of a small 5 megapixel camera over the eye which records your eyelid movements digitally frame by frame via your associated computer device.
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