Visual Place Recognition From Eye Reflection

The cornea in the human eye reflects incoming environmental light, which means we can obtain information about the surrounding environment from the corneal reflection in facial images. In recent years, as the quality of consumer cameras increases, this has caused privacy concerns in terms of identifying the people around the subject or where the photo is taken. This paper investigates the security risk of eye corneal reflection images: specifically, visual place recognition from eye reflection images. First, we constructed two datasets containing pairs of scene and corneal reflection images. The first dataset is taken in a virtual environment. We showed pre-captured scene images in a 180-degree surrounding display system and took corneal reflections from subjects. The second dataset is taken in an outdoor environment. We developed several visual place recognition algorithms, including CNN-based image descriptors featuring a naive Siamese network and AFD-Net combined with entire image feature representations including VLAD and NetVLAD, and compared the results. We found that AFD-Net+VLAD performed the best and was able to accurately determine the scene in 73.08% of the top-five candidate scenes. These results demonstrate the potential to estimate the location at which a facial picture was taken, which simultaneously leads to a) positive applications such as the localization of a robot while conversing with persons and b) negative scenarios including the security risk of uploading facial images to the public

Polarity of Public Perception over General Consent : Survey on Consciousness of Healthy Japanese Participants in Brain Database Projects

Researches based on clinical big data and Researches using bio-bank are recently increasing. In this study we discuss the issues involving general consent through a quantitative analysis of a national random sample survey in Japan. Among the 3,295 respondents, 42% of respondents agreed to general consent in some form. On the other hand, 58% of respondents preferred “tiered consent,” or “specific consent.” We interpreted this result as polarity of public perception over general consent. Referring to logistic regression analysis, the likelihood of preferring general consent increased with age (p<0.05), and “benefit of participating in research” was positively correlated, and “anxiety about participating in research” and “mindset that brain imaging is special” negatively correlated to the affirmative view of general consent (p<0.001)

Who is ""Regular"" of the Public Sports Facilities? : Based on a Questionnaire Survey in Yokohama

Who uses the public sports facilities? Especially, who is ""Regular"" that uses them constantly? This paper describes the figure of ""Regular"" from a point of view of their sociological features and their degrees of satisfaction with public sports facilities. We made a questionnaire survey of the users of 17 Sport Centers in Yokohama. By using the data of the survey, we classify these users to ""Regular"" and ""Non Regular"" from the angle of use frequency. That is, ""Regular""is defined the users once or more a week, and ""Non Regular"" is defined the users less than once a week. So, we compare, and consider the difference of both. The findings in this study can be summarized as follows : 1) We compare the ratio of ""Regular"" and that of ""Non Regular"" by a cross-table. The former is larger than the latter in men, middle-aged, older, housewives, persons without any job, and people going to classical music concerts, art galleries or museums. 2) We compare the degree of satisfaction of ""Regular"" and that of ""Non Regular"". The degree of total satisfaction of ""Regular"" is larger than that of ""Non Regular"". The degree of satisfaction with the hardware of ""Regular"" is as large as that of ""Non Regular"". The degree of satisfaction with the software of ""Regular"" is larger than that of ""Non Regular"". The degree of satisfaction with the humanware of ""Regular"" is larger than that of ""Non Regular"". 3) We analyze the tendency to be ""Regular"" by a multivariate analysis. The tendency to be ""Regular"" is confirmed in aged 40 or over, persons without any job, and contented persons with the software / humanware

Influence of Finishing/Polishing Procedures on the Surface Texture of Two Resin Composites

This study compared surface roughness and gloss produced by different finishing/polishing procedures for two resin composites, Clearfil AP-X (AP-X) and Estelite Σ (ES). A total of 70 composite discs (n=35 for each resin composite) were prepared and divided at random into seven finishing/polishing groups (n=5): glass-pressed control; using a super-fine-grit diamond bur (SF); using CompoMaster (CM) after SF-finishing (SF+CM); using White Point (WP) after SF-finishing (SF+WP); using CM after SF+WP-finishing (SF+WP+CM); using Stainbuster (SB) after SF-finishing (SF+SB); and using CM after SF+SB-finishing (SF+SB+CM). After the finishing/polishing procedures, average surface roughness (Ra) and surface gloss (Gs(60°)) of all specimens were assessed with a surface profilometer and specimen gloss meter, respectively. Glass-pressed controls for both AP-X and ES composites showed the best surface finish in terms of both Ra and Gs(60°). SF-finishing produced the roughest surface and led to almost complete loss of gloss. While additional polishing with CM reduced Ra and increased Gs(60°), the additional finishing effect of WP or SB between SF-finishing and CM-polishing was not found for either AP-X or ES