• Title/Summary/Keyword: color images

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2D to 3D Anaglyph Image Conversion using Quadratic & Cubic Bézier Curve in HTML5 (HTML5에서 Quadratic & Cubic Bézier 곡선을 이용한 2D to 3D 입체 이미지 변환)

  • Park, Young Soo
    • Journal of Digital Convergence
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    • v.12 no.12
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    • pp.553-560
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    • 2014
  • In this paper, we propose a method to convert 2D image to 3D anaglyph using quadratic & cubic B$\acute{e}$zier Curves in HTML5. In order to convert 2D image to 3D anaglyph image, we filter the original image to extract the RGB color values and create two images for the left and right eyes. Users are to set up the depth values of the image through the control point using the quadratic and cubic B$\acute{e}$zier curves. We have processed the depth values of 2D image based on this control point to create the 3D image conversion reflecting the value of the control point which the users select. All of this work has been designed and implemented in Web environment in HTML5. So we have made it for anyone who wants to create their 3D images and it is very easy and convenient to use.

A Study of Outer-ring Galaxies within z<0.05 (적색편이 z<0.05의 외부고리 은하에 대한 연구)

  • Chang, Hunhwi;Sohn, Jungjoo;Ahn, Hongbae
    • Journal of the Korean earth science society
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    • v.41 no.3
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    • pp.211-221
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    • 2020
  • This study classified outer-ring galaxies using 25,308 galaxies within z=0.05 from the SDSS DR7, which are larger than Rpet>6 arcsec and whose minor-to-major axis ratio (b/a)<0.6. We selected 531 galaxies that have ring-like structures by visual inspection of the color images of 25,308 galaxies; these galaxies with ring-like structures served as a primary sample from which we selected 90 outer-ring galaxies. The final sample of 69 outer-ring galaxies was selected by examining the photometric properties of the candidate galaxies. Their properties were determined by conducting surface photometry on their u, g, r, i, and z images. The frequency of the outer-ring galaxies was found to be 0.3% of the local galaxies. We examined the environment of the outer-ring galaxies using two measures of environment, namely, the projected distance to the nearest-neighbor galaxy and the local background density. We did not observe any notable difference between outer-ring and other galactic environments.

SPATIAL DISTRIBUTION OF STARS AROUND SIX METAL-POOR GLOBULAR CLUSTERS IN THE GALACTIC BULGE

  • Chang, Cho-Rhong;Kim, Jae-Woo;Matsunaga, Noriyuki;Han, Mihwa;Ko, Jongwan;Chun, Sang-Hyun;Kang, Minhee;Sohn, Young-Jong
    • Journal of The Korean Astronomical Society
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    • v.46 no.6
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    • pp.203-224
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    • 2013
  • Wide-field $JHK_s$ images obtained with the SIRIUS near-infrared camera of the IRSF 1.4m telescope are used to examine the tidal structures of the spatial stellar configuration around six metal-poor ([Fe/H]< -1.0) globular clusters located within 3 kpc from the Galactic center. The radial surface density profiles are obtained from the surface photometry of the cluster images and the star counting for the photometric data. For the star counting, candidates of cluster member stars are selected with an filtering algorithm in color-magnitude diagrams. We find that the six target clusters show tidal overdensity features in the radial surface density profiles. There is a break inside the tidal radius for each cluster, and the profile in the outer overdensity region is characterized by a power law. Two-dimensional density maps of all the clusters show distorted asymmetric stellar configurations in the outer region. In five out of the six target clusters, the overdensity features are likely to be associated with the effects of the Galaxy dynamical interaction and the cluster space motions. The observed tidal configurations of stars suggest that several metal-poor clusters in the Galactic bulge are possibly surviving remnants of mergers to build the old stellar system of the Galactic bulge.

Multispectral Mural Underdrawing Mosaic Technique (다중스펙트럼 기반 벽화 밑그림 영상 모자익 기법)

  • 이태성;권용무;고한석
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.41 no.5
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    • pp.175-183
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    • 2004
  • In this paper, we propose a new accurate and robust image mosaic technique of the mural underdrawing taken from the infra-red camera, which is based on multiple image registration and adaptive blending technique. The image mosaicing methods which have been developed so far have the following deficits. It is hard to generate a high resolution image when there are regions that do not have features or intensity gradients, and there is a trade-off in overlapping region size in view of registration and blending. We consider these issues as follows. First, in order to mosaic images with neither noticeable features nor intensity gradients, we use a projected supplementary pattern and pseudo color image for features in the image pieces which are registered. Second, we search the overlapping region size with minimum blending error between two adjacent images and then apply blending technique to minimum error overlapping region. Finally, we could find our proposed method is more effective and efficient for image mosaicing than conventional mosaic techniques and also is more adequate for the application of infra-red mural underdrawing mosaicing. Experimental results show the accuracy and robustness of the algorithm

Case Study of Design Motifs of National Symbols in Countries Including Korea: Focused on Scarves and Neckties

  • Kyung, Nam-Jae;Keum, Key-Sook
    • International Journal of Costume and Fashion
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    • v.12 no.2
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    • pp.67-82
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    • 2012
  • 21st century is the Age of Culture, and a period that is represented by symbolism and imagery. This is no exception for the countries that want to enhance their image in the international community. In order for a country to improve its brand, it has to select a representative emblem, symbols and cultural items. The usual suspects for this are its name, flag, and anthem. Each of these items can elicit different types of symbolism. It can also be used to differentiate the country from others; however, these are not the only sources of symbolism at the country's disposal. Other popular tools include cultural heritage, both tangible and intangible, climate, natural environment, and its national character. A country can use these items to associate itself with certain images. The purpose of this study is to find an objective way to effectively boost Korea's brand. This will be done by comparing and contrasting the ways countries including Korea have used their national emblems to enhance their image. Data from each of the countries were collected and analyzed. The results of this study will become empirical evidence in researches aimed to develop fashion designs that use Korea's national emblem as its motif in order to improve its national brand Countries that were used for this research were United States, United Kingdom, Japan, France and Korea, and they were chosen because their national brand rated highly. The items selected for the analysis were scarves and neckties. This was because, compared to other fashion items, it was easier to sort out scarves and neckties that used motifs of national emblems as well as these two items having the highest usage rate of this type of motif. Group of experts looked through a combined total of 370 scarves and ties and they analyzed the following factors in the design: type of motifs, frequency, use of color, methods of expression and images.

Quality Assessment of Images Projected Using Multiple Projectors

  • Kakli, Muhammad Umer;Qureshi, Hassaan Saadat;Khan, Muhammad Murtaza;Hafiz, Rehan;Cho, Yongju;Park, Unsang
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.6
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    • pp.2230-2250
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    • 2015
  • Multiple projectors with partially overlapping regions can be used to project a seamless image on a large projection surface. With the advent of high-resolution photography, such systems are gaining popularity. Experts set up such projection systems by subjectively identifying the types of errors induced by the system in the projected images and rectifying them by optimizing (correcting) the parameters associated with the system. This requires substantial time and effort, thus making it difficult to set up such systems. Moreover, comparing the performance of different multi-projector display (MPD) systems becomes difficult because of the subjective nature of evaluation. In this work, we present a framework to quantitatively determine the quality of an MPD system and any image projected using such a system. We have divided the quality assessment into geometric and photometric qualities. For geometric quality assessment, we use Feature Similarity Index (FSIM) and distance-based Scale Invariant Feature Transform (SIFT). For photometric quality assessment, we propose to use a measure incorporating Spectral Angle Mapper (SAM), Intensity Magnitude Ratio (IMR) and Perceptual Color Difference (ΔE). We have tested the proposed framework and demonstrated that it provides an acceptable method for both quantitative evaluation of MPD systems and estimation of the perceptual quality of any image projected by them.

Progress report of the deep and wide-field imaging survey of nearby galaxies with KMTNet

  • Byeon, Woowon;Kim, Minjin;Sheen, Yun-Kyeong;Ho, Luis C.;Jeong, Hyunjin;Kim, Sang Chul;Lee, Joon Hyeop;Park, Byeong-Gon;Seon, Kwang-Il
    • The Bulletin of The Korean Astronomical Society
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    • v.42 no.1
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    • pp.58.3-58.3
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    • 2017
  • In a ${\Lambda}CDM$ universe, galaxies are believed to evolve by mergers and accretions. The debris resulting from such processes remains as diffuse, low-surface brightness structures, such as outer disks, stellar halos, and faint companions. These structures will give us fruitful insight into the recent mass assembly history of galaxies, but it is challenging to observe them due to their low surface brightness. In order to explore the structural properties of outskirts of nearby galaxies, we conduct deep wide-field imaging survey with KMTNet. Here we present a progress report of data reduction for the images of NGC 1291, a lenticular barred galaxy with outer rings. To achieve accurate flat fielding, we use dark sky flat and remove the sky gradient of each exposure with a polynomial fit. As a result, we are able to reach 1 sigma depth of ${\mu}_R{\sim}29.6\;mag\;arcsec^{-2}$. We expect to investigate the surface brightness profile of NGC 1291 in 1-D profile, and color-gradient in the outer part of the galaxy using the B- and R-band images.

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Improvement of Retrieval Performance using Automatically Weighted Image Features (영상 특징들에 자동 가중치 부여를 이용한 검색 성능 개선)

  • Kim, Kang-Wook;Park, Jong-Ho;Hwang, Chang-Sik
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.37 no.6
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    • pp.17-21
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    • 2000
  • Typical image features such as color, shape, and texture are used in content based image retrieved. Retrieval which uses only one image feature has little performance in case that the content of image is complex or database contains many images. So, many approaches for integrating these features have been studied. However, the problem of these approaches is how to appropriately weight the image features at query time. In this paper, we propose a new retrieval method using automatically weighted image features. We perform computer simulations in test database which consists of various kinds of images. The experimental results show that the proposed method has better performance than previous works, which use fixed weight for each feature mostly, in respect to several performance cvaluations such as precision vs recall, retrieval efficiency, and ranking measure.

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Analysis of Infoshade of Displacement Map for Making Digital Contents (디지털콘텐츠 제작을 위한 Displacement map의 음영정보 분석)

  • Park, Keong-Cheol
    • The Journal of the Korea Contents Association
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    • v.11 no.8
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    • pp.59-67
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    • 2011
  • Digital Contents have been considered as major parts in the areas, such as design, cartoon, video and etc. A number of Digital Contents are made with the works of popular computer program, Photoshop, and used in some courses of making works. Channel is obviously regarded as a high-level function among others in using Photoshop, even though it hinder a lot of users in understanding the way and the principle to use. Channel and Displacement Map have something in common, because they share the infoshade of channel. The infoshade is the information of 256 levels which consists of black and achromatic colors between white and black color. The infoshade of Channel is used as a concept of movement in Displacement Map. Displacement Map analyzes infoshade in 'Displacement map images' and transfer the pixels of original images under the application of displacement map. This means that the infoshade of Channel can be made for the application with characteristic of movement. This study was carried out to analyze the principle of application of infoshade in 'Displacement Map' with Photoshop. Thus, the central aim of this study is not so much studying engineering algorithm as studying and analyzing the principle of Channel's infoshade through studying how the infoshade of channel is applied in the work.

Automatic Segmentation of the meniscus based on Active Shape Model in MR Images through Interpolated Shape Information (MR 영상에서 중간형상정보 생성을 통한 활성형상모델 기반 반월상 연골 자동 분할)

  • Kim, Min-Jung;Yoo, Ji-Hyun;Hong, Helen
    • Journal of KIISE:Computing Practices and Letters
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    • v.16 no.11
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    • pp.1096-1100
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    • 2010
  • In this paper, we propose an automatic segmentation of the meniscus based on active shape model using interpolated shape information in MR images. First, the statistical shape model of meniscus is constructed to reflect the shape variation in the training set. Second, the generation technique of interpolated shape information by using the weight according to shape similarity is proposed to robustly segment the meniscus with large variation. Finally, the automatic meniscus segmentation is performed through the active shape model fitting. For the evaluation of our method, we performed the visual inspection, accuracy measure and processing time. For accuracy evaluation, the average distance difference between automatic segmentation and semi-automatic segmentation are calculated and visualized by color-coded mapping. Experimental results show that the average distance difference was $0.54{\pm}0.16mm$ in medial meniscus and $0.73{\pm}0.39mm$ in lateral meniscus. The total processing time was 4.87 seconds on average.