著者
田中 孝昌 外山 史 宮道 壽一 東海林 健二
出版者
The Institute of Image Information and Television Engineers
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.64, no.12, pp.1933-1939, 2010-12-01
被引用文献数
6

Today, the demand is increasing for comic contents on cellular phones and speech software for the visually impaired. When speech software reads aloud a comic character's speech, it is useful for both the visually impaired and unimpaired to have the character's voice injected with his/her feeling, which is inferred from types of speech balloons. As a result, comic contents come to life. In this research, a method has been developed to detect speech balloons on comic pages and then classify them into four types. In this method, speech balloon candidates are extracted based on speech text information detected by AdaBoost, and then speech balloons are selected and classified using SVM. Experimental results show that the proposed method successfully detected and classified 86 percent of 2844 speech balloons.
著者
志水 英二
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.65, no.6, pp.758-763, 2011-06-01
参考文献数
33
被引用文献数
1

本質的に視覚生理に優しい網膜走査・投影方式ディスプレイについて動作原理,システム構成,動作特性を述べた.走査方式については作業などのAR応用に優れた特性をもつシステムについて,投影方式については,本方式の欠点を克服した広域視野化とメガネ型構成の方式について述べた.また,本方式が低視力者支援に寄与できることとその効果について述べた.
著者
陳 延偉
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.63, no.12, pp.1773-1777, 2009-12-01
参考文献数
20

近年,新しい多次元信号解析手法として独立成分分析法が注目されている.従来の主成分分析法に比べると,独立成分分析法は2次以上のモーメントの非相関化を行うので,非直交的な成分分離も可能である.画像認識分野にも応用され,大きな成果をあげている.本講座では,ICAの基礎理論および画像認識への応用例について解説する.
著者
吉田 匠 城 堅誠 南澤 孝太 新居 英明 川上 直樹 舘 [ススム]
出版者
The Institute of Image Information and Television Engineers
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.63, no.6, pp.801-809, 2009-06-01

A wide field of vision is important for driver safety and vehicle operability. However, the window area of vehicles is limited. Therefore, we developed head-tracked retro-reflective projection technology that displays vehicle blind spot information. The system enables the driver to observe the surroundings in the blind spot as if seeing through the inner wall of the vehicle. The system uses a head-mounted projector and multiple cameras. We describe the system design, the implementation of a prototype, and performance evaluation experiments. Early experiments showed that the system effectively displayed the blind spot information corresponding to the operator's looking around motion.
著者
岡野 邦彦
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.57, no.2, pp.203-209, 2003-02-01
参考文献数
10

天体は暗い背景に置かれた自己発光物であることから極端な明暗差があり, 画像表現が難しい.それをうまく表現する方法が銀塩フィルムでは古くから工夫されてきた.冷却CCDカメラによる天体画像を綺麗に仕上げるために, このフィルムで培われてきたのと似た処理をディジタル的に実施する「ディジタル現像」と呼ばれる方法が成功を収めている.
著者
スリヨン タンスリヤボン 千葉 正広 花木 真一
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.56, no.12, pp.1980-1988, 2002-12-01
参考文献数
19
被引用文献数
3 1

A circumstantial video image should convey sufficient information about the situation, while protecting the privacy of the specific person' s in the scene. This paper describes a concealment system which automatically identifies a person by using face recognition, tracks him or her, and displays his or her image in a modified form such as in silhouette with or without name, or displays only a name instead of the original video image. A method for comparing situational information obtained from the modified or raw circumstantial video image with one required in several applications is also described. A subjective evaluation was carried out in order to ascertain how people evaluate modified video images from the observer or subject viewpoint. As a result of an experiment in which the several applications were considered, the silhouette with name list type of concealment seems to be the most appropriate observer-subject compromise.
著者
三木 信之
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)
巻号頁・発行日
vol.55, no.1, pp.103-111, 2001-01-20
参考文献数
7
被引用文献数
16 3

The variance of the bit error rate (BER) of orthogonal frequency division multiplexing (OFDM) transmission with the delay time and the phase of the multi-path has not yet been sufficiently clarified. Multi-path introduces amplitude ripples into OFDM transmission, and these ripples change the C/N of each carrier. These changes, in turn, lead to variations in the BER of each carrier. The BER of the entire OFDM is calculated by adding and averaging the carrier-by-carrier BERs. Using mathematical representations of these factors, we theoretically and experimentally demonstrated that the equivalent C/ N degradation from a reference C/N of 22 dB, where the BER of error-correction-free 64-QAM OFDM is 0.009679, oscillates periodically at a delay of 1/ (OFDM bandwidth) and approaches the average value as the delay time increases. We found that the BER has either local maxima or local minima at a delay time equivalent to 1/ (1· (OFDM carrier interval)), where 1 is a positive integer.