Transactions of Japan Society of Kansei Engineering

Featured article

Volume 16 (2017) Issue 2 Pages 245-252

The Correlation between the Sites of the Brain for Different Bandwidths of EEG in Interictal Paroxysmal rhythmic Activity: Using Wavelet-crosscorrelation Analysis

Kozue YAMAGUCHI, Yoshihiro TSUJI, Steven M.A. CARPELS, Ryoma HAYASHI, Yuji INOGUCHI, Yuko MIZUNO-MATSUMOTO

Interictal paroxysmal rhythmic activity can appear in electroencephalography (EEG) in patients with mental disorders. The abnormal EEG were analyzed by wavelet-crosscorrelation analysis. The EEG were categorized as following: 2-4 seconds (A) and 0-2 seconds (B) before the appearance of the abnormal EEG; 2 seconds during the abnormal EEG (C); 0-2 seconds (D) and 2-4 seconds (E) after the abnormal EEG. Wavelet-crosscorrelation coefficients (WCC) in the theta and alpha bands for each segment were calculated in all patients. The results in the theta band showed that the abnormal connections between the sites in the brain could continue although the EEG seemingly recovered from the interictal paroxysmal rhythmic activity. The results in the alpha band showed that the normal connections between the sites in the brain could be weakened in the 2 seconds prior to the beginning of the interictal paroxysmal rhythmic activity in the EEG.

Volume 16 (2017) Issue 2 Pages 209-218

Acceleration of Calculation for Field of Visual Perception on Digital Image and Verification of the Application to Halftone Image

Naoyuki AWANO

Field of Visual Perception (FVP) has been attracted as a method for quantitative evaluation of impression. In recently, FVP for digital images has been proposed, and the effectiveness has been confirmed. However, FVP has not been applied widely on the field of image processing by two reasons: (1) the calculation cost is too high, and (2) only calculation model for binary images has been established and it cannot be applied to grayscale images. This paper first proposes an acceleration method for increasing practicality. Next, instead of grayscale image, we verify the correctness and the effectiveness of applying FVP to halftone image, which is binary image converted from grayscale image without discomfort. The experimental results showed that the calculation cost decreased to 0.01% at least. Moreover, the results of applying FVP to halftone images showed both of the difficulties and the potentialities for evaluating impression.

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2019 Volume 18 Issue 2

Smartphone Case Design with Fall Prevention Function Kazuyoshi TAKAHASHI, Hiroharu KAWANAKA, Keita TANAKA
Automatic Affective Image Captioning System using Emotion Estimation Yuya MIYOSHI, Masafumi HAGIWARA

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