著者
佐伯 昌彦 井村 誠孝 安室 喜弘 眞鍋 佳嗣 千原 國宏
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 (ISSN:13426907)
巻号頁・発行日
vol.60, no.10, pp.1593-1598, 2006-10-01 (Released:2008-03-07)
参考文献数
6
被引用文献数
1 1

Colors in nature can be classified into two categories: colors which originate in pigments (coloring matter) and structural colors, which are caused by optical path differences at the level of microscopic structures. Structural colors change according to viewing angles and lighting conditions. This paper proposes a generic method for rendering structural colors in real time. The proposed method's use of optical path differences as common parameters enables unified treatment of various types of microscopic structures and representation by textures that store optical path differences, which can speed up rendering. The proposed method can be applied to object of arbitrary shapes and enables rendering from random viewing angles and lighting conditions in real time.
著者
田房 友典 石川 聖二 河口 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 (ISSN:13426907)
巻号頁・発行日
vol.52, no.12, pp.1856-1859, 1998-12-20
被引用文献数
1

ビデオカメラに向かって歩く人物の衣服を画像認識する方法を提案する.直立正面向きの姿勢に近い人物像をビデオ画像から抽出し, 弛緩法を中心とする画像処理によって, 上下衣服の種類を判別する.実画像による実験結果を示す.監視システムへの応用が期待される.
著者
中西 敦士 藤井 俊彰 木本 伊彦 谷本 正幸
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 (ISSN:13426907)
巻号頁・発行日
vol.56, no.8, pp.1321-1327, 2002-08-01
被引用文献数
33 14

A new method for interpolating ray-space data is described that uses block matching and one-sided extension of the locus of corresponding points for arbitrary-view image generation. The block detects straight lines for interpolation. The one-sided extension interpolates occluded pixels. Testing showed that the proposed method generates intermediate images well even when occlusion occurs
著者
野田 勉 原田 守夫 宮沢 寛 石黒 公 西山 光生 清水 信作 伊東 晋
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 (ISSN:13426907)
巻号頁・発行日
vol.51, no.9, pp.1509-1516, 1997-09-20
被引用文献数
17 1

The Cable Television Conference working group conducted experiments on the 64 QAM signal transmission in a CATV system from 1995 to 1996. These experiments were based on the tentative specifications of the Telecommunications Technology Council of the Ministry of Posts and Telecommunications (MPT), to promote standardization of the Japanese digital CATV system. Experimental results showed that a C/N of more than 26 dB, a Composite Triple Beat (CTB) of less than -43 dB, and a single carrier interference of less than -30 dB were required to keep a BER of less than 1×10^<-4> without forward error correction. Cable reflection within the conventional CATV standard for NTSC-AM signals was low enough for 64 QAM signals. Experiments on adjacent channel interference between 64 QAM and NTSCAM signals indicated that the 64 QAM signal level needed to be lower than the NTSC-AM signal level by about 4-20 dB. Based upon these results, the Japanese standard was introduced by MPT on December 3,1996.
著者
小池 康晴 長石 道博
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 (ISSN:13426907)
巻号頁・発行日
vol.57, no.11, pp.1465-1469, 2003-11-01

本連載では,,LATEXによる入稿,組版の電子化推進のために,LATEXの基本的な使い方について解説する.連載4回目の本稿では,MacOSにおける基本的なインストールと実際に使う上でのポイントを説明する.
著者
鈴木 華代 小宮 一三 池田 弘明
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 (ISSN:13426907)
巻号頁・発行日
vol.61, no.7, pp.1017-1020, 2007-07-01

We present improved practical color filter array interpolation methods that use color correlation for use in digital cameras.Cost-effective digital cameras use a single-chip image sensor and subsequent interpolation processing to produce full-color images.Therefore,many type of sophisticated algorithms have been proposed to create high quality images.Their complicated algorithms make it difficult,however,for them to be implemented in digital cameras due to limited computing capacity or available processing time.Although existing interpolation methods that use a directional color correlation are very cost-effective,they result in color artifact on the edge of color boundaries.We propose two algorithms to resolve this problem.One is a constrained color correlation method that is achieved by adding constrained conditions.The other is the precious color correlation methods that uses a nonlinear filter.The proposed methods can eliminate the artifact regardless of any color correlation of the images.Experimental results confirm the effectiveness of these methods.
著者
宮崎 誠也 申 金紅 青木 輝勝 安田 浩
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 (ISSN:13426907)
巻号頁・発行日
vol.58, no.7, pp.966-973, 2004-07-01
被引用文献数
8 1

Many attempts have been made to reduce the burden and difficulty of CG (Computer Graphics) in movie production. One of the biggest evolutions is an automatic control approach driven by commands or language, instead of traditional CG production. In this paper, we propose methods and tools for automatic and directorial camera control that are invoked by a text script. This approach is based on the knowledge base of cinematographic rules and movie analysis imformation. We suggest considering directorial differences and optimal constraint satisfaction for adjusting CG camera work. An algorithm is implemented and checked in the DMP (Digital Movie Producer) system that aims at visualizing scripts written in simple natural language.