Transcript 시감자극_실험방법_분석_황지수_0825

EEG vs. 시감자극 : 실험방법
Mesopic vision 광도색채 표준개발
융합기술 기반 시감 측정시스템의 평가
Steady-State Visual Evoked Potential (SSVEP)
 Oscillatory EEG activity resulting from repetitive stimulation (flickering)
 Neurons in human visual cortex synchronize their firing to the frequency of
flickering light
 EEG responses with same (or multiples of) frequency as the flickering
(a) SSVEP measurement result for
(b) vision stimulation of 16 Hz
color vision stimulator : Flickering mode (16 Hz)
EEG measurement : bipolar method
Oz (active electrode)
Cz (reference electrode)
Fpz (ground electrode)
Better Standards, Better Life
EEG vs. 시감 자극 (16 Hz) : raw data
16 Hz flickering
0519 실험, Test1_syncImage.cdf
EEG vs. 시감 자극 (16 Hz) : FFT
16 Hz 시감자극
0519 실험, Test1_syncImage.cdf, cutoff frequency: 12 Hz
Mesopic vision 광도색채 표준개발
융합기술 기반 시감 측정시스템의 평가
Correlation of SSVEP with vision stimulation
correlation coefficient : 0.983
correlation coefficient : 0.945
Recording time : 600 s
Number of ensemble average : 58
correlation coefficient : 0.978
Better Standards, Better Life
EEG vs. 시감 자극의 변화 (period 10 s) : raw data
시감자극 변화
Test field 변화 인지시
피시험자가 표시
실험0630_VEP_Processed_v2, Red.cdf
EEG vs. 시감 자극의 변화 (period 10 s)
1 s, 99% moving window, 16 Hz 성분 추출(absolute band power),
Event: 시감자극 변화, Ensemble averaging # : 58
실험0630_VEP_Processed_v2, Red.cdf
EEG vs. 색 인지 (period 10 s)
1 s, 99% moving window, 16 Hz 성분 추출(absolute band power),
Event: Test field 변화 인지, Ensemble averaging # : 58
실험0630_VEP_Processed_v2, Red.cdf
Correlation of EEG with 색 인지 : raw data
Trial 1
(시감자극 변화)
Trial 2
(moving
windows의
overlap 고려 :
1s)
Analysis: Cross Pearson’s Correlation
VEP Correlation, Red_Corr(0~10.2s).cdf