A5003657120- Air Quality and Health Impacts
- Image Enhancement Techniques
- Korean Urban and Social Studies
- Innovation and Knowledge Management
- Effects and risks of endocrine disrupting chemicals
- Regional Development and Policy
- Reproductive biology and impacts on aquatic species
- Korean Peninsula Historical and Political Studies
- Toxic Organic Pollutants Impact
- Climate Change and Health Impacts
- Environmental Toxicology and Ecotoxicology
- Diverse Approaches in Healthcare and Education Studies
- Color Science and Applications
- Chinese history and philosophy
- University-Industry-Government Innovation Models
- International Law and Human Rights
- Socioeconomic Development in Asia
- Advanced Image Fusion Techniques
- Migration, Ethnicity, and Economy
- Heavy Metal Exposure and Toxicity
- Advanced Vision and Imaging
- Japanese History and Culture
- Diverse Topics in Contemporary Research
- Energy and Environmental Systems
- Video Surveillance and Tracking Methods
National Institute of Environmental Research
2009-2024
Ministry of Environment
2021-2024
Inha University
2012-2024
Yonsei University
2010-2022
Korea Institute of Science and Technology
2021-2022
Korea University
2010-2021
Doosan Heavy Industries & Construction (South Korea)
2020
Kyungpook National University
2015-2019
Korean Association for Public Security Administration
2016
National Security Research Institute
2016
A novel contrast enhancement algorithm based on the layered difference representation of 2D histograms is proposed in this paper. We attempt to enhance image by amplifying gray-level differences between adjacent pixels. To end, we obtain histogram h(k, k + l ) from an input image, which counts pairs pixels with gray-levels and , represent a tree-like structure. Then, formulate constrained optimization problem observation that differences, occurring more frequently should be emphasized output...
A novel contrast enhancement algorithm based on the layered difference representation is proposed in this work. We first represent gray-level differences at multiple layers a tree-like structure. Then, observation that differences, occurring more frequently input image, should be emphasized output we solve constrained optimization problem to derive transformation function each layer. Finally, aggregate functions all into overall function. Simulation results demonstrate enhances images...
The Korean National Environmental Health Survey (KoNEHS) program provides useful information on chemical exposure, serves as the basis for environmental health policies, and suggests appropriate measures to protect public health. Initiated a three-year cycle in 2009, it reports concentrations of major chemicals among representative population. KoNEHS Cycle 3 introduced children adolescents into analysis, where blood urine samples 6167 participants were measured metals, phthalates, phenolics,...
A graph-based system to simulate the movements and interactions of multiple random walkers (MRW) is proposed in this work. In MRW system, agents traverse a single graph simultaneously. To achieve desired among those agents, restart rule can be designed, which determines distribution each agent according probability distributions all agents. particular, we develop repulsive for data clustering. We illustrate that clustering segment real images reliably. Furthermore, propose novel image...
An unsupervised video object segmentation algorithm, which discovers a primary in sequence automatically, is proposed this work. We introduce three energies terms of foreground and background probability distributions: Markov, spatiotemporal, antagonistic energies. Then, we minimize hybrid the to separate from its background. However, energy nonconvex. Therefore, develop alternate convex optimization (ACO) scheme, decomposes nonconvex into two quadratic programs. Moreover, propose...
A dark image enhancement algorithm based on the pairwise target contrast and multi-scale detail boosting is proposed in this work. We first compute between a pair of pixels, which represents desired gray level difference two pixels output image. By aggregating contrasts for all pairs an image, we formulate cost function enhancement. minimizing function, obtain optimal transformation enhance In addition, propose approach to boost details globally enhanced Experimental results show that...
Abstract This study brings to light the problem of identifying, and determining status of, ethnic Korean migrants who assert membership in national community. The influx members diaspora China former Soviet Union has posed challenges South Korea's legal definition its practice keeping boundaries nationhood. In response challenges, Korea calibrated administration for admitting those coethnics devised novel categories membership. It enacted executive rules guidelines acquisition citizenship by...
We propose a video stabilization algorithm, which extracts guaranteed number of reliable feature trajectories for robust mesh grid warping. first estimate through sequence and transform the positions into rolling-free smoothed positions. When estimated is insufficient, we generate virtual by augmenting incomplete using low-rank matrix completion scheme. Next, detect points on large moving object exclude them so as to stabilize camera movements, rather than movements. With selected points,...
Association between short-term exposure to fine particulate matter (PM2.5) and mortality or morbidity varies geographically, this variation could be due different chemical composition affected by local sources. However, there have been only a few Asian studies possibly limited monitoring data. Using nationwide regulatory data of PM2.5 components in South Korea, we aimed compare the associations daily across six major cities. We obtained 24-h concentrations 11 measured from 2013 2015 at...
Abstract The phrase “decoupling of nation and state” has increasing currency in discussions the transformation citizenship state-people connection this age global migration. This study questions soundness characterising current those terms. Asserting that nexus between state is being renegotiated readjusted rather than disconnected or attenuated, highlights multifaceted multi-dimensional character state-nation by introducing case Republic Korea. In so doing, inquires into, throws light upon:...
An optimized brightness-compensated contrast enhancement (BCCE) algorithm for transmissive liquid crystal displays (LCDs) is proposed in this paper. We first develop a global scheme to compensate the reduced brightness when backlight of an LCD device dimmed power reduction. also derive distortion model describe information loss due compensation. Then, we formulate objective function that consists term and term. By minimizing function, maximize backlight-scaled image contrast, subject...
Toluene is classified as a possible carcinogen, but its role on thyroid cancer not well established. Vehicle emissions are one of the largest contributed sources toluene, no studies evaluating influence living near road association between toluene and incidence have been reported. Therefore, we examined potential associations blood concentrations risk cancer, an effect modification road. We conducted prospective cohort study using data from South Korean "Monitoring Project for Exposure to...
Exposure to persistent organic pollutants (POPs) has been reported as a potential risk factor for diabetes in adults. However, effect modifications by sex and age, especially among Asian populations, have seldom investigated. In the present study, we assessed associations of major POPs exposure including organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), with Korean adults (n = 1,295), subset National Environmental Health Survey...
A novel power-constrained contrast enhancement algorithm for organic light-emitting diode (OLED) displays is proposed in this work. We first develop the log-modified histogram equalization (LMHE) scheme, which reduces overstretching artifacts of conventional technique. Then, we model power consumption OLED displays, and incorporate it into LMHE to achieve optimal tradeoff between saving. Simulation results demonstrate that can reduce significantly, while preserving image qualities.