• Journal of Korea Multimedia Society
• /
• v.22 no.6
• /
• pp.646-654
• /
• 2019

Image denoising is considered as a key factor for capturing high-quality photos in digital cameras. Thus far, several image denoising methods have been proposed in the past decade. In addition, previous studies either relied on deep learning-based approaches or used the hand-crafted filters. Unfortunately, the previous method mostly emphasized on image denoising regardless of preserving or recovering the detail information in result images. This study proposes an detail extraction network to estimate detail information from a noisy input image. Moreover, the extracted detail information is utilized to enhance the final denoised image. Experimental results demonstrate that the proposed method can outperform the existing works by a subjective measurement.

• Journal of the HCI Society of Korea
• /
• v.6 no.1
• /
• pp.21-26
• /
• 2011

This paper presents a robust method for facial image synthesis under varying illumination by combining illumination correction and Poisson image processing techniques. The presented method automatically detects skin area and corrects highly saturated regions that can cause bad effects on the final synthesis image. The developed method can be applied to various facial synthesis applications by correcting illumination variations that can occur frequently on photos taken with a camera phone.

• Journal of ILASS-Korea
• /
• v.7 no.2
• /
• pp.16-21
• /
• 2002

Liquefied petroleum gas (LPG) has been used as motor fuel due to its low emissions and low cost. This study addresses the analysis of the LPG spray behavior near injection nozzle. The LPG spray photographs are compared with sprays of diesel fuel at the same conditions. The LPG spray photos show that the dispersion characteristic depends very sensuously on the ambient pressure soon after injection. The spray angle is very wide in a low ambient pressure condition until the saturated pressure at this test condition, but the angle value is quickly reduced at the condition over the pressure.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.15 no.5
• /
• pp.360-366
• /
• 2022

This paper presents a AI model structure for restoring Korean traditional palace photographs, which remain only black-and-white photographs, to color photographs using Pix2Pix, one of the adversarial generative neural network techniques. Pix2Pix consists of a combination of a synthetic image generator model and a discriminator model that determines whether a synthetic image is real or fake. This paper deals with an artificial intelligence model by adjusting a receptive field of the discriminator, and analyzes the results by considering the characteristics of the ancient palace photograph. The receptive field of Pix2Pix, which is used to restore black-and-white photographs, was commonly used in a fixed size, but a fixed size of receptive field is not suitable for a photograph which consisting with various change in an image. This paper observed the result of changing the size of the existing fixed a receptive field to identify the proper size of the discriminator that could reflect the characteristics of ancient palaces. In this experiment, the receptive field of the discriminator was adjusted based on the prepared ancient palace photos. This paper measure a loss of the model according to the change in a receptive field of the discriminator and check the results of restored photos using a well trained AI model from experiments.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.36 no.4
• /
• pp.365-369
• /
• 2016

Red sorrel (Rumex acetosella L.), as one of exotic weeds in Korea, was dominated in grassland and reduced the quality of forage. Improving current pasture productivity by precision management requires practical tools to collect site-specific pasture weed data. Recent development in unmanned aerial vehicle (UAV) technology has offered cost effective and real time applications for site-specific data collection. To map red sorrel on a hill pasture, we tested the potential use of an UAV system with digital cameras (visible and near-infrared (NIR) camera). Field measurements were conducted on grazing hill pasture at Hanwoo Improvement Office, Seosan City, Chungcheongnam-do Province, Korea on May 17, 2014. Plant samples were obtained at 20 sites. An UAV system was used to obtain aerial photos from a height of approximately 50 m (approximately 30 cm spatial resolution). Normalized digital number values of Red, Green, Blue, and NIR channels were extracted from aerial photos. Multiple linear regression analysis results showed that the correlation coefficient between Rumex content and 4 bands of UAV image was 0.96 with root mean square error of 9.3. Therefore, UAV monitoring system can be a quick and cost effective tool to obtain spatial distribution of red sorrel data for precision management of hilly grazing pasture.

• Journal of Fashion Business
• /
• v.16 no.6
• /
• pp.80-95
• /
• 2012

This study covers the literature of theoretical backgrounds of royal ceremonial hair styles during Chosun Dynasty and demonstrates reproduction works of those hair styles reinterpreted in modern methods. As for the Chosun royal hair styles for ceremonies, there are Daesoo, Gudoomi, and Euyoumi for a royal queen, royal concubines, and royal lady attendants of Nae Myung Boo, department of general affairs of the royal court. These hair styles represents well that Chosun Dynasty kept its own class symbols through hair styles, which is valuable cultural resources of Korean traditional beauties. This study compares the new reproduction works of Daesoo, Gudoomi, and Euyoumi with existing literature pieces and related photos for clear understanding of these traditional hair styles. This study aims to activate the relevant researches into Korean traditonal hair styles, their reproduction methods and applicable usages in Modern Korea as well as useful data for them.

• Korean Journal of Remote Sensing
• /
• v.18 no.3
• /
• pp.163-169
• /
• 2002

The land uses of Korean peninsula are very complicated and high-density. Therefore, the image classification using coarse resolution satellite images may not provide good results for the land cover classification. The purpose of this paper is to compare the classification accuracy of visual interpretation with that of digital image classification of satellite remote sensing data such as 20m SPOT and 30m TM. In this study, hybrid classification was used. Classification accuracy was assessed by comparing each classification result with reference data obtained from KOMPSAT-1 EOC imagery, air photos, and field surveys.

• International conference on construction engineering and project management
• /
• 2005.10a
• /
• pp.615-620
• /
• 2005

The aim of this study is to evaluate the public preference to the breakwaters of fishing harbors in Taiwan, so that the results could be applied to the successive study of breakwater landscape improvement. Among the breakwaters' photographs those took on the fishing harbors, this study picked up 4 photos for demonstration and 60 for questionnaire according to their spatial types configured with crest of breakwater, crown wall, and armoring blocks) and other landscape factors. The preference evaluation was conducted by questionnaire to the public, 385 effective questionnaires were taken into analysis. Results reveals: (1) the open, colorful, recreational and water-intimate breakwaters are preferred. (2) The combination types and visual elements (shapes, colors, textures, lines and scales) of breakwaters are also influence the public preference.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.8 no.4
• /
• pp.510-518
• /
• 1996

The study presents experimental and theoretical analysis focusing on the infulence of a noncondensable gas upon the absorption enhancement that is obtained by Marangoni convection generated by the addition of the surfactant. The shadowgraph method is adopted in this visualization. As a result of absorption phenomena with shadowgraph photos, the different patterns of Marangoni convection cells are observed in accordance with the various amounts of noncondensable gas. Furthermore, non dimensional number K(Ma/Ra) is introduced to calculate the value of surface tension difference theoretically for the comparison with the various amount of non condensable gas in absorber.

• Korean journal of applied entomology
• /
• v.48 no.4
• /
• pp.411-415
• /
• 2009

A newly recorded species of Philostephanus Distant, 1909 from Korea, P. ulmi (Kerzhner, 1979), is reported with brief taxonomic notes on the Korean Philostephanus species. Morphological keys of the Korean Philostephanus species are provided with the photos of adults and female genitalia for each species.