• Title/Summary/Keyword: 이미지 품질 평가

Search Result 140, Processing Time 0.028 seconds

Evaluating Accuracy of Algorithms Providing Subsurface Properties Using Full-Reference Image Quality Assessment (완전 참조 이미지 품질 평가를 이용한 지하 매질 물성 정보 도출 알고리즘의 정확성 평가)

  • Choi, Seungpyo;Jun, Hyunggu;Shin, Sungryul;Chung, Wookeen
    • Geophysics and Geophysical Exploration
    • /
    • v.24 no.1
    • /
    • pp.6-19
    • /
    • 2021
  • Subsurface physical properties can be obtained and imaged by seismic exploration, and various algorithms have been developed for this purpose. In this regard, root mean square error (RMSE) has been widely used to quantitatively evaluate the accuracy of the developed algorithms. Although RMSE has the advantage of being numerically simple, it has limitations in assessing structural similarity. To supplement this, full-reference image quality assessment (FR-IQA) techniques, which reflect the human visual system, are being investigated. Therefore, we selected six FR-IQA techniques that could evaluate the obtained physical properties. In this paper, we used the full-waveform inversion, because the algorithm can provide the physical properties. The inversion results were applied to the six selected FR-IQA techniques using three benchmark models. Using salt models, it was confirmed that the inversion results were not satisfactory in some aspects, but the value of RMSE decreased. On the other hand, some FR-IQA techniques could definitely improve the evaluation.

품질경쟁력 평가모형에서 제품 디자인의 인과관계와 디자인 경영에 관한 실증적 분석 : 한국 제조업 부문을 중심으로

  • 임채숙;임양택
    • Proceedings of the Technology Innovation Conference
    • /
    • 2004.06a
    • /
    • pp.170-213
    • /
    • 2004
  • 생산자 중심에서 소비자 중심으로의 경영 패러다임이 변화함에 따라, 이제 디자인 경영(design management)의 시대가 도래하였다 즉, 제반 기능의 활동이 독립적이고 순차적으로 이루어지는 기존 경영방식(즉, 제품 개발 $\rightarrow$ 제품 디자인 $\rightarrow$ 제조 $\rightarrow$ 마케팅 $\rightarrow$ 판매)과는 달리, 디자인 경영은 디자인을 중심으로 제반 기능간의 통합과 조정을 이룬다. 이 결과, 디자인 경영은 조직간의 커뮤니케이션을 활성화시키며 소비자의 추상적인 욕구가 구체적으로 상품에 표현되도록 노력한다. 이렇게 함으로써, 디자인 경영은 기업 이미지 창조의 역할을 적극적으로 수행하는 것이다. 이와 같은 소비자 중심의 경영은 과거 제품의 판매(sales)지향적이던 기업 활동을 소비자와의 관계(relationship)지향적으로 변화시키고 있다. 본 연구의 분석 목적은 제품 디자인을 품질경쟁력의 결정요인으로서 포함시켜 품질경쟁력의 평가모형을 개발하고 품질경쟁력의 결정요인 및 상관관계와 품질함수를 추정함으로써 제품 디자인 및 디자인 경영의 기능적 역할을 규명하고 디자인 경쟁력 수준을 평가 및 측정할 수 있는 모형을 정립함과 동시에 이를 제고할 수 있는 정책방향을 제시하는 것이다. 이로써, 본 연구는 신상품의 개발과정에서 어떻게 제품 디자인이 연구개발, 제조, 마아케팅, 판매 등의 제반 기능들과 상호 작용하며 이들 기능들의 통합과 조정을 추구할 수 있는가를 보여주는 디자인 경영의 이론적 기초를 제공하고자 함이다. 상기와 같은 연구목적과 분석목표를 위하여, 한국 제조업 부문의 400개 표본기업에 대하여 소정의 설문조사를 통하여 추출된 측정변수들을 기초로 품질경쟁력의 결정요인을 분석하고 품질경쟁력 지수를 도출하여 산업부문별 및 제품유형별로 비교하였으며, 품질함수를 추정하였다. 전술한 분석결과를 토대로, 디자인 경영이론의 기초를 제공하기 위한 시도로서 제품 디자인의 파급효과와 인과관계에 대한 가설검정을 실시하였다. 본 연구의 분석 결과는 다음과 같이 요약될 수 있다. (1) 품질경쟁력의 결정요인으로서 주요 제품들의 기능성, 기본 성능, 제품성과의 기술적 성취도, 제품 수명(내구성), 신뢰성, 핵심 기술력, 사용 편의성, 서비스 편의성, 생산 용이성, 제품 디자인의 우수한 정도가 a=0.01 수준 하에서 유의적으로 추정되었다. 이들 변수들 중에서 품질경쟁력에 가장 큰 영향을 미치는 측정변수는 제품의 기본 성능, 수명(내구성), 신뢰성, 제품 디자인의 순서로 추정되었다. 이것은 한국 제조업이 아직 산업 디자인이 품질경쟁력에 크게 영향을 미치는 성숙단계에 이르지 못하였음을 의미한다. (2) 제품 디자인에게 영향을 끼치는 유의적인 변수는 연구개발력, 연구개발투자 수준, 혁신활동 수준(5S, TPM, 6Sigma 운동, QC 등)이며, 제품 디자인은 우선 품질경쟁력을 높여 간접적으로 고객만족과 고객 충성을 유발하는 것으로 추정되었다. 상기의 분석결과로부터, 본 연구는 다음과 같은 정책적 함의를 도출하였다. 첫째, 신상품 개발과 혁신을 위한 포괄적인 연구개발 프로젝트를 품질 경쟁력의 주요 결정요인(제품의 기본성능, 신뢰성, 수명(내구성) 및 제품 디자인)과 연계하여 추진해야 할 것이다. 둘째, 기업은 디자인 경영 마인드 제고와 디자인 전문인력 양성을, 대학은 디자인 현장 업무를 통하여 창의력 증진과 기획 및 마케팅 능력 교육을, 정부는 디자인 기술개발 및 디자인 교육지원의 강화를 통하여 각각 디자인 경쟁력$\rightarrow$품질경쟁력을 제고시켜야 할 것이다.

  • PDF

기획 특집 - 전기에너지산업 현장(現場)을 가다 - LS산전(주)

  • 대한전기협회
    • JOURNAL OF ELECTRICAL WORLD
    • /
    • s.408
    • /
    • pp.69-76
    • /
    • 2010
  • 'Smart Grid 선도 기업', '국내 최고의 전력 자동화 기업' 등이 최근 LS산전을 인식하는 대표적인 상징어로 각인되고 있다. 이 가운데 스마트 그리드 분야의 선도 이미지는 LS산전이 지난 10여 년간 투자해온 전력IT 분야의 결실로 평가되고 있다. 1974년 설립된 LS산전(대표 구자균)은 과거의 생존게임을 탈피, 대단위 투자를 통한 그린 비지니스 전략 및 비전을 구체화 하고 있다. 국가적 차원의 아젠더로 추진되면서 일상생활의 패러다임을 변화시킬 원천기술인 스마트 그리드와 HVDC, 전력선 통신, 연료전지 등의 상용화 기술개발에도 박차를 가하고 있다. 품질경영과 혁신활동을 중시하면서도 창조적이고 역동적인 소통의 기업문화를 자랑하는 LS산전의 미래성장을 위한 글로벌 열정은 여전히 진행 중이다.

  • PDF

Evaluating Printing Quality Based on ISO 13660 and Color Criteria Using Scanner Images (스캐너 이미지 기반 ISO 13660 및 컬러 품질 항목 평가)

  • Hwang, Tae-Yoon;Yi, June-Ho
    • Proceedings of the IEEK Conference
    • /
    • 2008.06a
    • /
    • pp.1011-1012
    • /
    • 2008
  • Image quality analysis has been carried out for both monochrome and colour print images obtained by a calibrated low-end scanner. The analysis method is based upon ISO13660 for monochrome images and additional criteria for colour quality that we have defined. We have compared performance of the calibrated scanner with that of a high-end spectrophotometer in terms of several aspects such as line and large area. They have provided similar results without significant discrepancy.

  • PDF

Patch Information based Linear Interpolation for Generating Super-Resolution Images in a Single Image (단일이미지에서의 초해상도 영상 생성을 위한 패치 정보 기반의 선형 보간 연구)

  • Han, Hyun-Ho;Lee, Jong-Yong;Jung, Kye-Dong;Lee, Sang-Hun
    • Journal of the Korea Convergence Society
    • /
    • v.9 no.6
    • /
    • pp.45-52
    • /
    • 2018
  • In this paper, we propose a linear interpolation method based on patch information generated from a low - resolution image for generating a super resolution image in a single image. Using the regression model of the global space, which is a conventional super resolution generation method, results in poor quality in general because of lack of information to be referred to a specific region. In order to compensate for these results, we propose a method to extract meaningful information by dividing the region into patches in the process of super resolution image generation, analyze the constituents of the image matrix region extended for super resolution image generation, We propose a method of linear interpolation based on optimal patch information that is searched by correlating patch information based on the information gathered before the interpolation process. For the experiment, the original image was compared with the reconstructed image with PSNR and SSIM.

Preliminary Study (1) for Development of Computed Radiography (CR) Image Analysis according to X-ray Non-destructive Test by Wood Species (Computed Radiograhpy (CR)를 통한 목재 수종별 X선 투과 이미지 해석을 위한 기초연구 (1))

  • Song, Jung Il;Kim, Han Seul
    • Journal of Conservation Science
    • /
    • v.37 no.3
    • /
    • pp.220-231
    • /
    • 2021
  • The use of digital copies of film-based analog images and the introduction of digital radiographic imaging systems using image plates gradually replace the non-destructive radiationirradiation method of Cultural Heritage. The quality of images obtained from this technique is affected by conditions such as tube voltage, tube current, and exposure time, type of image acquisition medium, distance of the artifacts from the image acquisition medium, and thickness of artifacts. In this study, we evaluated the grayscale image obtained using GE's Computed Radiograhpy (CR) imaging system, the transmission characteristics of the X-ray source for each tree type (pine, chestnut, sawtooth oak, ginkgo) used in wooden Cultural Heritage, and the signal-to-noise ratio (SNR) and contrast. The GE's CR imaging were analyzed using the Duplex wire image quality indicator, line-pair gauges.

Semantic Segmentation Intended Satellite Image Enhancement Method Using Deep Auto Encoders (심층 자동 인코더를 이용한 시맨틱 세그멘테이션용 위성 이미지 향상 방법)

  • K. Dilusha Malintha De Silva;Hyo Jong Lee
    • KIPS Transactions on Computer and Communication Systems
    • /
    • v.12 no.8
    • /
    • pp.243-252
    • /
    • 2023
  • Satellite imageries are at a greatest importance for land cover examining. Numerous studies have been conducted with satellite images and uses semantic segmentation techniques to extract information which has higher altitude viewpoint. The device which is taking these images must employee wireless communication links to send them to receiving ground stations. Wireless communications from a satellite are inevitably affected due to transmission errors. Evidently images which are being transmitted are distorted because of the information loss. Current semantic segmentation techniques are not made for segmenting distorted images. Traditional image enhancement methods have their own limitations when they are used for satellite images enhancement. This paper proposes an auto-encoder based image pre-enhancing method for satellite images. As a distorted satellite images dataset, images received from a real radio transmitter were used. Training process of the proposed auto-encoder was done by letting it learn to produce a proper approximation of the source image which was sent by the image transmitter. Unlike traditional image enhancing methods, the proposed method was able to provide more applicable image to a segmentation model. Results showed that by using the proposed pre-enhancing technique, segmentation results have been greatly improved. Enhancements made to the aerial images are contributed the correct assessment of land resources.

Adaptive Enhancement of Low-light Video Images Algorithm Based on Visual Perception (시각 감지 기반의 저조도 영상 이미지 적응 보상 증진 알고리즘)

  • Li Yuan;Byung-Won Min
    • Journal of Internet of Things and Convergence
    • /
    • v.10 no.2
    • /
    • pp.51-60
    • /
    • 2024
  • Aiming at the problem of low contrast and difficult to recognize video images in low-light environment, we propose an adaptive contrast compensation enhancement algorithm based on human visual perception. First of all, the video image characteristic factors in low-light environment are extracted: AL (average luminance), ABWF (average bandwidth factor), and the mathematical model of human visual CRC(contrast resolution compensation) is established according to the difference of the original image's grayscale/chromaticity level, and the proportion of the three primary colors of the true color is compensated by the integral, respectively. Then, when the degree of compensation is lower than the bright vision precisely distinguishable difference, the compensation threshold is set to linearly compensate the bright vision to the full bandwidth. Finally, the automatic optimization model of the compensation ratio coefficient is established by combining the subjective image quality evaluation and the image characteristic factor. The experimental test results show that the video image adaptive enhancement algorithm has good enhancement effect, good real-time performance, can effectively mine the dark vision information, and can be widely used in different scenes.

Effects and Limitations of Separating Overlapped Fingerprints Using Fast Fourier Transform (고속 푸리에 변환(fast Fourier transform, FFT)을 이용한 겹친지문 분리의 효과와 한계)

  • Kim, Chaewon;Kim, Chaelin;Lee, Hanna;Yu, Jeseol;Jang, Yunsik
    • Korean Security Journal
    • /
    • no.61
    • /
    • pp.377-400
    • /
    • 2019
  • Photography is the most commonly used method of documenting the crime and incident scene as it helps maintaining chain of custody (COC) and prove integrity of the physical evidence. It can also capture phenomena as they are. However, digital images can be manipulated and lose their authenticity as admissible evidence. Thus only limited techniques can be used to enhance images, and one of them is Fourier transform. Fourier transform refers to transformation of images into frequency signals. Fast Fourier transform (FFT) is used in this study. In this experiment, we overlapped fingerprints with graph paper or other fingerprints and separated the fingerprints. Then we evaluated and compared quality of the separated fingerprints to the original fingerprints, and examined whether the two fingerprints can be identified as same fingerprints. In the case of the fingerprints on graph paper and general pattern-overlapping fingerprints, fingerprint ridges are enhanced. On the other hand, in case of separating complicated fingerprints such as core-to-core overlapping and delta-to-delta overlapping fingerprints, quality of fingerprints can be deteriorated. Quality of fingerprints is known to possibly bring negative effects on the credibility of examiners. The result of this study may be applicable to other areas using digital imaging enhancement technology.

A Study on the Web Service Quality and User Satisfaction at Open Market (오픈마켓의 웹서비스 품질과 사용자 만족)

  • Son, Yong-Shim;Seo, Chang-Gab
    • Journal of Digital Convergence
    • /
    • v.11 no.6
    • /
    • pp.113-127
    • /
    • 2013
  • The open market are expanding service quality which was used as rating scale in the field of marketing. In accordance with open market, they convert it to e-service quality and use it. Udo et al.[6] suggested web service quality combining e-SEVQUAL[2] and extended Information Success Model[7]. This study suggests four influence factors of e-service quality in the open market; website privacy and security, web site contents, web site convenience, and images of the open market companies. The study conducted survey on 301 college students and life long education center students in Busan. The study found that all four influence factors have positive effects on the web service quality and ultimately web service quality has beneficial effects on the satisfaction in open market users' information system.