• Title/Summary/Keyword: 영상 표현의 식별성

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Quantitative Analysis Method for Encrypted Video (암호화된 동영상 비식별화율의 정량적 분석 방법)

  • Deok-Han Kim;Young-Gab Kim
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.193-195
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    • 2023
  • 최근 다양한 동영상 미디어 콘텐츠가 늘어나면서 민감한 개인정보 유출의 위험성 또한 높아졌다. 이에 따라 다양한 동영상 비식별화 기법이 연구되었고, 그중에서 동영상 암호화 기술은 별도로 원본 동영상을 보관하지 않아도 복호화를 통해 원본 동영상을 얻을 수 있다는 장점 때문에 계속해서 연구가 진행되고 있다. 많은 동영상 암호화 연구에서는 암호화된 동영상의 비식별성을 입증하기 위해 기존의 이미지 암호화 연구에서 사용되던 평가 지표를 사용한다. 그러나 이러한 지표들은 암호화된 동영상의 비식별성을 입증하기에는 적합하지 않다. 따라서 본 논문에서는 암호화된 동영상이 전체 구간에서 비식별화되었는지 확인하는 방법을 제안한다. 본 논문에서는 기존의 지표들을 가중 합산하여 동영상의 모든 프레임에 대해 측정하고 이를 그래프로 표현하여 분석한다. 이 방법을 통해 암호화된 동영상에서 비식별화가 정상적으로 적용되지 않은 부분을 쉽게 파악할 수 있다.

The Study on the Factors of film's Processing Fluency Inducing Film's Preference Fluency (영화의 선호도 유창성에 영향을 미치는 영화의 처리 유창성 요인에 관한 연구)

  • Choi, Nak Hwan;Lim, Ahyoung
    • Asia Marketing Journal
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    • v.13 no.4
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    • pp.29-54
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    • 2012
  • Recently, as film has been admitted as the artistic merit and higher value-added business, the past studies on film have been lively carried on various fields. Especially, the film business is thought to be value-added business and has explored the causes of influencing spectators. However, there are no researches enough to explain what induces the choice and diffusion of the film. The film is not only hedonic products but also typical example of experiential products. So how to process film formation plays important roles in explaining the procedures of forming preference on the film and the movies spread more widely. But the great part of study of films has been concentrated on exploring hedonic factors of influencing spectator's choice. Until now there is not enough study for the relationship between experiential information processing and film preference. To explain film's preference, our study focuses on preference fluency and processing fluency that can provide an insight for our question about the relationship. In this article, to explain the procedures of processing experiential information and forming preference on the film, our study focuses on finding the relationship between film's processing fluency and film's preference fluency and explores the factors that affect film's processing fluency. To achieve the goal of this study, we distinguish factors of film's conceptual fluency from factors of film's perceptual fluency and explore the paths from the factors to film's preference fluency. The factors which have effects on perceptual fluency are hypothesized to be distinction of image expression, distinction of sound expression, correspondence between actors' image and their role. The factors which have effect on conceptual fluency are supposed to be well-organized story, suitability of lines expression. The experiments in which students were sampled at 'C' university were conducted in 2010 (december). Data collection was proceeded through questionnaires. We test the hypothesized model by using structural equation modeling(Amos 17.0). The fit indices for the model are as follows : x2=416.266(df=213, p=0.00), GFI=0.855, AGFI=0.812, RMSEA =0.069, IFI=O.925, CFI=0.920, TLI=0.905. According to the guidelines, there is evidence that our measurement model fits data. The results of empirical study are as follows. The path from film's perceptual fluency to film's preference fluency is supported(estimate: 0.223, C.R: 2.641). The path from film's conceptual fluency to film's preference fluency is supported(estimate: 0.397, C.R: 4.863). The path from distinction of image expression to film's perceptual fluency is not supported(estimate: 0.113, C.R: 1.665). The path from distinction of sound expression to film's perceptual fluency is supported (estimate: 0.190, C.R: 2.042). The path from correspondence between actors' image and their role to film's perceptual fluency is supported(estimate: 0.686, C.R: 5.566). The path from well-organized story to film's conceptual fluency is supported(estimate: 0.396, C.R: 4.023). The path from suitability of lines expression to film's conceptual fluency is supported(estimate: 0.536, C.R: 5.441). Concludingly, our study explored the influencing factors of film's processing fluency inducing film's Preference fluency. First, film's perceptual fluency and film's conceptual fluency have positive effects on film's preference fluency. Second, distinction of image expression is not significant on film's perceptual fluency, but distinction of sound expression and image's correspondence of actors' image and their role have positive effects on film's perceptual fluency. Lastly, well-organized story and suitability of lines expression have positive effects on film's conceptual fluency.

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An Indexing Model for Effective Retrieval of Multimedia Data Based on XML (XML 기반 멀티 미디어 데이터의 효과적인 검색을 위한 색인 모델)

  • Ko, Eun-Kyung;Hwang, Bu-Hyun
    • Proceedings of the Korea Information Processing Society Conference
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    • 2002.11c
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    • pp.1895-1898
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    • 2002
  • 웹 환경에서 처리하는 데이터의 종류가 텍스트에서 비디오, 오디오와 같은 멀티미디어 데이터까지 다양해지면서 데이터를 효율적으로 표현, 저장 및 검색하기 위한 다양한 방법이 연구되고 있다. 이 논문에서는 동영상 데이터의 구조적인 형태를 고려하여 XML 문서로 표현하고 XML 문서를 데이터베이스에 저장하기 위한 데이터베이스 스키마를 설계하였다. 그래서 XML 문서내의 각 노드에 엘리먼트의 고유성을 나타내기 위한 고유식별자와 부모노드와 자식노드들 간의 관계를 표현하여 주기 위한 엘리먼트 식별자와 ETID를 결합하여 멀티미디어 데이터에 대한 XML 문서의 부모와 자식의 관계를 표현하여 준다. 그리고 부모가 같은 형제간의 순서 정보와 형제들 간의 동일한 타입을 구별하고 정보를 표현하기 위한 관계 테이블을 설계하였다.

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Image Identifier based on Local Feature's Histogram and Acceleration Technique using GPU (지역 특징 히스토그램 기반 영상식별자와 GPU 가속화)

  • Jeon, Hyeok-June;Seo, Yong-Seok;Hwang, Chi-Jung
    • Journal of KIISE:Computing Practices and Letters
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    • v.16 no.9
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    • pp.889-897
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    • 2010
  • Recently, a cutting-edge large-scale image database system has demanded these attributes: search with alarming speed, performs with high accuracy, archives efficiently and much more. An image identifier (descriptor) is for measuring the similarity of two images which plays an important role in this system. The extraction method of an image identifier can be roughly classified into two methods: a local and global method. In this paper, the proposed image identifier, LFH(Local Feature's Histogram), is obtained by a histogram of robust and distinctive local descriptors (features) constrained by a district sub-division of a local region. Furthermore, LFH has not only the properties of a local and global descriptor, but also can perform calculations at a magnificent clip to determine distance with pinpoint accuracy. Additionally, we suggested a way to extract LFH via GPU (OpenGL and GLSL). In this experiment, we have compared the LFH with SIFT (local method) and EHD (global method) via storage capacity, extraction and retrieval time along with accuracy.

Development of CAD-MAP and position identification for ALV (CAD-MAP의 개발 및 무인차량의 위치 식별)

  • 강재관;서석환;지우석
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.646-651
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    • 1991
  • 무인차량(ALV)이 옥외 주행시 자신의 위치를 알아내는 방법으로써 카메라 를 통한 입력 영상과 자신이 보유하고 있는 지도 정보를 이용하는 방법에 대하여 연구하였다. 이를 위하여 본 연구에서는 지도정보를 컴퓨터에 효율적 으로 표현하는 방법과 이 정보를 이용하여 필요한 투시도를 생성 시켜주는 "CAD-MAP" 시스템을 구현하였고 이를 이용하여 ALV의 위치를 계산하는 방법을 개발하였다. 개발된 방법의 유효성은 컴퓨터 모의실험을 통하여 검증 해 보였고, 실제 영상에 적용할 때 영상이 가지는 여러 가지 노이즈를 감안 위치 계산의 정확도를 높일 수 있는 방법에 대해서도 연구하였다.

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Extraction of UAV Image Sharpness Index Using Edge Target Analysis (에지 타겟 분석을 통한 무인기 영상의 선명도 지표 추출)

  • Lim, Pyung-Chae;Seo, Junghoon;Kim, Taejung
    • Korean Journal of Remote Sensing
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    • v.34 no.6_1
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    • pp.905-923
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    • 2018
  • In order to generate high-resolution products using UAV images, it is necessary to analyze the sharpness of the themselves measured through image analysis. When images that have unclear sharpness of UAV are used in the production, they can have a great influence on operations such as acquisition and mapping of accurate three-dimensional information using UAV. GRD (Ground Resolved Distance) has been used as an indicator of image clarity. GRD is defined as the minimum distance between two identifiable objects in an image and is used as a concept against the GSD (Ground Sampling Distance), which is a spatial sample interval. In this study, GRD is extracted by analyzing the edge target without visual analysis. In particular, GRD to GSD ratio (GRD/GSD), or GRD expressed in pixels, is used as an index for evaluation the relative image sharpness. In this paper, GRD is calculated by analyzing edge targets at various altitudes in various shooting environments using a rotary wing. Using GRD/GSD, it was possible to identify images whose sharpness was significantly lowered, and the appropriateness of the image as an image clarity index was confirmed.

Check of Concurrency in Parallel Programs using Image Information (영상정보를 이용한 병렬 프로그램내의 병행성 판별)

  • Park, Myeong-Chul;Ha, Seok-Wun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.12
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    • pp.2132-2139
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    • 2006
  • A parallel program including a nested parallelism has a complex execution aspects and tasks are executed concurrently. This concurrency is a main cause raising most of errors. In this paper, a new method for checking concurrency between two tasks is proposed. The existing techniques for checking the concurrency have their limits to represent a global structure. A new labeling technique that appropriate for image visualization is proposed. To show the global structure by imaging of execution aspects through region partition on 2D plane. On the basis of it, each of the tasks that can distinguish the ordered relation create an independent image. Image information generated by the result simplifies semantic analysis of the related task, and provides an outline of a global execution aspects structure of the program to user effectively.

A Flexible Feature Matching for Automatic Facial Feature Points Detection (얼굴 특징점 자동 검출을 위한 탄력적 특징 정합)

  • Hwang, Suen-Ki;Bae, Cheol-Soo
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.3 no.2
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    • pp.12-17
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    • 2010
  • An automatic facial feature points(FFPs) detection system is proposed. A face is represented as a graph where the nodes are placed at facial feature points(FFPs) labeled by their Gabor features and the edges are describes their spatial relations. An innovative flexible feature matching is proposed to perform features correspondence between models and the input image. This matching model works likes random diffusion process in the image space by employing the locally competitive and globally corporative mechanism. The system works nicely on the face images under complicated background, pose variations and distorted by facial accessories. We demonstrate the benefits of our approach by its implementation on the system.

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A flexible Feature Matching for Automatic Face and Facial Feature Points Detection (얼굴과 얼굴 특징점 자동 검출을 위한 탄력적 특징 정합)

  • 박호식;배철수
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.4
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    • pp.705-711
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    • 2003
  • An automatic face and facial feature points(FFPs) detection system is proposed. A face is represented as a graph where the nodes are placed at facial feature points(FFPs) labeled by their Gabor features and the edges are describes their spatial relations. An innovative flexible feature matching is proposed to perform features correspondence between models and the input image. This matching model works likes random diffusion process in !be image space by employing the locally competitive and globally corporative mechanism. The system works nicely on the face images under complicated background, pose variations and distorted by facial accessories. We demonstrate the benefits of our approach by its implementation on the face identification system.

A Flexible Feature Matching for Automatic face and Facial feature Points Detection (얼굴과 얼굴 특징점 자동 검출을 위한 탄력적 특징 정합)

  • 박호식;손형경;정연길;배철수
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.05a
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    • pp.608-612
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    • 2002
  • An automatic face and facial feature points(FFPs) detection system is proposed. A face is represented as a graph where the nodes are placed at facial feature points(FFPs) labeled by their Gabor features md the edges are describes their spatial relations. An innovative flexible feature matching is proposed to perform features correspondence between models and the input image. This matching model works likes random diffusion process in the image spare by employing the locally competitive and globally corporative mechanism. The system works nicely on the face images under complicated background, pose variations and distorted by facial accessories. We demonstrate the benefits of our approach by its implementation on the fare identification system.

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