"BIS and EOG dataset"

"This dataset was collected using the ADS1299 and MAX30009 to simultaneously record electrooculography (EOG) and periocular bioimpedance (BIS) signals. It consists of two parts: ex1 and ex2.In ex1, two electrodes were placed around the eye region and bioimpedance was measured using a frequency sweep from 1 kHz to 808.960 kHz at 11 frequency points: 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz, 30.976 kHz, 66.944 kHz, 131.072 kHz, 249.856 kHz, 581.632 kHz, and 808.960 kHz. The sweep was repeated at approximately 2.1 samples per second, yielding 2000 samples in total. The measurement order followed a repeated gaze sequence of center, up, down, left, and right. In this part of the dataset, files ending with data1 contain the real part of the impedance, and files ending with data2 contain the imaginary part of the impedance.In ex2, the bioimpedance excitation frequency was fixed at 16 kHz with a stimulus current of 32 \u03bcA RMS. The sampling rate was 125 Hz for the MAX30009, while the ADS1299 was sampled at 250 Hz. The ADS1299 used only channel 1 for EOG recording, and the EOG and bioimpedance channels shared the same measurement electrodes, as described in the paper. This part includes 34,469 training samples and a test set recorded on a separate day after the electrodes were re-placed. Eye-movement directions were automatically labeled using L2CS-Net, and blink events were detected using MediaPipe and the Eye Aspect Ratio (EAR) method. All raw data were originally stored in CSV format. For training, the data were further converted into NPY format for easier model loading and training, while the test set was kept in CSV format."