著者

池田 華子 田中 智明 石山 智弘 日高 聡太 宮崎 弦太

出版者

Japan Society of Kansei Engineering

雑誌

日本感性工学会論文誌 (ISSN:18845258)

巻号頁・発行日

vol.14, no.3, pp.369-379, 2015 (Released:2015-08-28)

参考文献数

16

被引用文献数

1 1

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Ultra-high definition (4K) imaging allows us to achieve considerably higher image quality than would high definition (HD) imaging. The present study examined how 4K and HD imaging could influence subjective impressions of movies differently, in association with the quantities of motion and fields of view of these movies. We found that stronger impressions regarding comfort and impact were evoked for 4K movies with smaller quantities of motion and medium field of view. Stronger perceptions of impact occurred for HD movies with larger quantities of motion and larger field of view. HD movies also gave stronger impression regarding dynamics regardless of motion quantities. Additionally, HD movies down-converted from 4K movies tended to induce higher impressions regarding evaluation and comfort in some situations. These results suggest that subjective impressions of movies are influenced by the differences in resolution images, as well as interactions between imaging types and characteristics of movie contents.

著者

池田 華子 田中 智明 日高 聡太 石山 智弘 宮崎 弦太

出版者

日本認知科学会

雑誌

認知科学 (ISSN:13417924)

巻号頁・発行日

vol.23, no.2, pp.101-117, 2016-06-01 (Released:2016-12-01)

参考文献数

23

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In relation to the recent development of ultra high definition imaging technique (4K) that have quadruple amount of pixels relative to high definition imaging (HD), it has been reported that observer’s subjective impression differ between these imaging. The present study examined how differences in resolution (4K and HD imaging) influence subjective impressions of movies in association with movie contents (natural/artificial objects) and fields of view (wide/medium/narrow) (Exp1). We also investigated the effects of the quantities of motion on subjective impressions of movies in different im-ge resolutions with the flame rate higher (59.94 fps) than the previous study (23.98 fps) (Exp2). We found that 4K movies, as compared to HD movies, induced stronger impressions regarding evaluation and comfort especially when they were presented with natural scene and/or larger field of view. It was also shown that 4K movies with higher flame rate induced stronger impressions regarding desirability and comfort regardless of motion quantities, contrary to the previous finding that 4K movies with the larger quantities of motion gave observer lower impression regarding desirability and comfort than HD movies. These results demonstrate that the differences in image resolution could modulate subjective impressions of movies in accordance with the differences in movie contents, fields of view, and flame rate. Moreover, the current findings suggest that there exist some desirable conditions under which the ultra high definition imaging could effectively enhance observers’ subjective impressions of movies.