• 제목/요약/키워드: achromatic

검색결과 258건 처리시간 0.032초

Adaptive White Point Extraction based on Dark Channel Prior for Automatic White Balance

  • Jo, Jieun;Im, Jaehyun;Jang, Jinbeum;Yoo, Yoonjong;Paik, Joonki
    • IEIE Transactions on Smart Processing and Computing
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    • 제5권6호
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    • pp.383-389
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    • 2016
  • This paper presents a novel automatic white balance (AWB) algorithm for consumer imaging devices. While existing AWB methods require reference white patches to correct color, the proposed method performs the AWB function using only an input image in two steps: i) white point detection, and ii) color constancy gain computation. Based on the dark channel prior assumption, a white point or region can be accurately extracted, because the intensity of a sufficiently bright achromatic region is higher than that of other regions in all color channels. In order to finally correct the color, the proposed method computes color constancy gain values based on the Y component in the XYZ color space. Experimental results show that the proposed method gives better color-corrected images than recent existing methods. Moreover, the proposed method is suitable for real-time implementation, since it does not need a frame memory for iterative optimization. As a result, it can be applied to various consumer imaging devices, including mobile phone cameras, compact digital cameras, and computational cameras with coded color.

필립트레이시(Philip Treacy) 작품연구II (A Study on the Works of Philip Treacy II)

  • 김은실
    • 복식
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    • 제59권10호
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    • pp.151-171
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    • 2009
  • The purpose of this study is to analyze the formative relationship between clothes and hat with the works by Philip Treacy, the designer who raised hats to one of important fashion accessories. The method to analyze the relationship between clothes and hats was the formative analysis by Marian L. Davis and Marilyn R. Delong. The results suggest that clothes and hat had an organic relationship, and a hat style was changed with formative elements of clothes. Clothes and hats by Philip Treacy were analysed in the aspects of Form, Color, Material, and Decoration. As a result, hats by Philip Treacy were mainly designed by the relationship between whole types without a closed line and showed geometric and formative forms, similarly harmonized with clothes. To highlight hats, the achromatic colors such as black and gray were used. Besides clothes and hats were coordinated by the same colors, but contrary colors were used to express a strong image. Felt or straw materials maily used to express a formative and fixed form were well matched with smooth, opaque, and lusterless materials such as wool. Also when transparent materials were used for hats, lace was used for clothes. A hat made of acrylic was matched with clothes made of glossy vinyl coating materials. Decoration was mainly removed but if used, feather decoration was added to clothes.

현대 아동복의 디자인 특성 분석 - 2006S/S~2010S/S 컬렉션의 여자 아동복를 중심으로 - (The Design Characteristics of Modern Children's Clothes - Focus on Children's Clothes for Girls From The 2006S/S-2010S/S Collections -)

  • 공미란
    • 한국의류산업학회지
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    • 제14권3호
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    • pp.347-362
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    • 2012
  • The analysis results of the characteristics of children's clothes for school girls from the 2006S/S-2010S/S collections reveal that the most frequent type of item composition was 2'PS & 3'PS. T-shirts were the popular kind of item for upper garments and pants for lower garments. The major silhouettes were H and A line. The predominant neckline was U, which was followed by camisole and V. The major collar styles were stand-up and flat. Chromatic colors were used more than achromatic ones and after white the most popular colors were blue, pink, red, black, navy, and green. The dominant color scheme was a two-color or three-color scheme. The percentage of solid and patterned material garments was the highest and the most popular pattern was flowers. The most popular style of garment had no decorative detail that was followed by one-item, two-item, and three-item decoration. The major kinds of decorative detail were frills, pleats, and prints.

장신구와 재킷 색이 여성의 인상에 미치는 영향 (The Effect of Ornaments and Color of Jacket on Female Impression)

  • 이명희;강승희
    • 한국의류학회지
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    • 제22권8호
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    • pp.1111-1121
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    • 1998
  • The objectives of this study were to identify the dimensional structure of female impression formation based on ornaments and color of jacket, and to analyze the effect of ornaments, color of jacket, and perceiver's gender on impression formation. The experimental design was 3$\times$4$\times$2(ornaments$\times$color of jacket$\times$gender) factorial design by 3 independent variables. The stimuli of color photographs of female model and the semantic differential scale were used. Samples were 288 college males and females. The data were analyzed by factor analysis, ANOVA, duncan's multiple range test, and t-test. Four factors derived to account for the dimensions of impression formation. These were potency, elegance, evaluation, youthfulness, and feminine. Wearing of large ornaments(a necklace and earrings) had a negative effect on impression of elegance and positive on potency. Red jackets increased the impression of positive evaluation, potency, feminity, and youthfulness. On the jackets of achromatic color such as white and black, wearing of large ornaments increased the effect of potency, and large ornaments increased matured impression on black jacket. The results of this study mean that perceiverss used large ornaments and red jackets as a salient cue.

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최대 무채색 영역을 이용한 광원의 분광분포 추정 (Estimation of spectral Distribution of Illumination using Maximum achromatic Region)

  • 김희수;김윤태;이철희;하영호
    • 대한전자공학회논문지SP
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    • 제38권4호
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    • pp.68-68
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    • 2001
  • 본 논문에서는 단일 영상에 포함된 광원의 분광분포를 추정하는 광원추정 알고리즘을 제안한다. 제안된 광원 추정 방법은 두 단계로 이루어져 있다. 첫째, 변형된 회색계 가정(modified gray world assumption)을 이용하여 부분적으로 광원의 영향을 배제한 후 밝으면서도 무채색에 가까운 최대 무채색 영역을 찾아 그 영역의 표면 분광 반사율을 구한다. 이때 최대 무채색 영역의 표면 분광 반사율은 1269개의 Munsell 색 표본에 대하여 주성분 분석 방법을 이용하여 추정하였다. 둘째, 주어진 Munsell 색 표본과 대표 광원의 조합으로 반사광의 모집단을 만들었다. 다음 최대 무채색 영역의 각 화소와 반사광 모집단과의 색차를 비교하여 최대 무채색 영역과 색차가 가장 적은 반사광 표본을 선택하고 이를 최대 무채색 영역에 대한 반사광의 분광분포로 정의한다. 최종적으로 최저 무채색 영역의 반사광 분광분포를 해당하는 표면 분광반사율로 나누어줌으로써 영상에 포함된 광원의 분광분포를 추정한다. 제안한 알고리듬의 성능을 평가하기 위하여 유색 광원에 조명된 영상에 대한 광원 추정 실험을 하였으며 기존의 방법과 추정된 광원의 분광 분포 비교 및 색차 비교를 통해 그 타당성을 검증하였다.

유치원 교실의 색채이미지 선호도에 관한 연구 (A Study on the Color Image Preference of the classroom in kindergarten)

  • 정가영;이향미;이청웅
    • 한국실내디자인학회논문집
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    • 제13권5호
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    • pp.190-197
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    • 2004
  • A kindergarten requires an approach to meet the nature and sense of children who is main users. This study selected 33 private kindergartens which were located within a housing site development zone in Gwangju since the 1990's, had single use, and was constructed in the last five years. Also the image assessment according to types of color scheme was made. Then the factors which affected preference by type were analyzed and the basic of color scheme in a kindergarten classroom was provided. The following results were obtained. First, types of color scheme in a classroom included identity 12.1%, similarity 51.5%, and novelty 36.4% in harmony, but no contrast and achromatic color, Secondly, the assessment of preference according to each type was mostly positive. The highest preference was found in similarity harmony of warm color(e.g. YR, Y) and bright, clear, nice, and strong images were high in assessment. The lowest preference was found in identity harmony of cold color(e.g. GY). This color system had no clear image assessment, except manly or strong. In particular, warm color showed higher preference than cold color in similarity, novelty, and identity harmony. Thirdly, the factors affecting the preference of color scheme in a classroom most were ‘stable - unstable’, ‘clean - dirty’, ‘bright - dark’, ‘nice - not nice’, and ‘vital - dull’.

광원색이 직물의 색 변화에 미치는 영향 (The Influence of Luminous Source on Fabric Chromatic Change Effects)

  • 정지연;이은경
    • 대한가정학회지
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    • 제48권5호
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    • pp.17-24
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    • 2010
  • Although design, color, and material are important elements in stage costumes, stage lightning also plays significant role in the presentation of stage costumes. Costumes color, material and perception can be significantly influenced by visual effects. Stage illumination can be arranged or managed so that colors are closely related to or enhanced or change the effects of costume colors on the runway or display at specific times. The results of this thesis are as follow; 1) Fabric tone, name, brightness, and chroma of colors were changed by the colors of stage lighting. 2) An achromatic color was changed to a chromatic color after being combined with colors of stage lighting. 3) Stage illuminations can make fabric, colors look similar to stage colors. 4) Plain satin silk fabric which reflects light shows high brightness and chroma after being influenced by stage lighting its shining effects and color changes were clear and apparent. 5) Velvet pile fabric which absorbs light shows low brightness and chroma after being influenced by stage lightning its shining effects and changes of colors were not clear and apparent. In conclusion, natural lights did not significantly influence fabric colors and perception, while artificial lights had wide range of effects on fabric colors and perception.

현대여성패션에 나타난 벨트의 외적 특성에 관한 연구 (The Role of Exterior Features of Belts in Modern Women's Fashion)

  • 김선영
    • 대한가정학회지
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    • 제45권8호
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    • pp.39-47
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    • 2007
  • This study was conducted to evaluate the roles that the exterior features of belts play in modem women's fashion. Providing a new prospective on belt expression could be useful for developing and producing belts with newer and more unique fashion designs. This study included related studies, fashion magazines and collections produced both in Korea and abroad since 2000. The results of the study were as follows: 1. A belt can be used to stress femininity. For example wearing a broad belt rather than a thin belt emphasizes the waist, breasts or hips depending on the position of the belt, whereas simply Wearing a belt loosely on a tight or see-through dress can also emphasize femininity. 2. A belt can be used as a design element of a dress. The basic elements of a belt, such as leather used in combination with various colors, various manufacturing methods, and ornate buckle ornaments can produce elaborate decorative effects. However, when a belt is made from materials other than leather, the belt can have an ornamental quality on an achromatic dress. Finally, designing belts to be worn in non-conventional manners, such as girding or tying them, or wearing several belts on the arms, legs, shoulders and waist can result in new and expressive styles.

의복의 색과 문양이 의복착용자 인상에 미치는 영향 - 남녀 대학생을 중심으로 - (Effects of Motif Categories and Colors of Dress on Evaluating Impressions of Dress Wearers - Focusing on Male and Female University Students -)

  • 이소라;김재숙
    • 한국의류학회지
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    • 제32권7호
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    • pp.1160-1168
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    • 2008
  • The purpose of the study was to examine the effect of motif categories and motif colors on evaluating impressions of dress wearers. The research was conducted on a quasi experimental basis, with subjects numbering 187 male and 207 female college students. Data were collected in the period from march 19th to march 31st, 2007. A set of stimuli of dress wearers and semantic differential scales were developed. The stimuli were thirteen photographs editing by Youngwoo CAD system. Variables included; (a) motif colour(red, blue, achromatic and white) (b) motif categories(flower, paisley, stripes, zebra effect and plain). The semantic differential scale to measure impressions of dress wearer stimuli included 22 sets of hi-polar adjectives. The data were analysed by factor analysis and ANOVA and the major finding were as follows. Four factors emerged to account for dimension of impression. There were salience, attractiveness, comfort and femininity. The motif category effected on the four impression dimensions while the motif color effected on salience, comfort and softness sensory dimensions, and the results supported the gestalt theory of the impression perception.

A Study on the Design Characteristics of Chanel Bags - focused on the collections from S/S 2001 to F/W 2008 -

  • Jang, Ji-Hye;Cho, Kyu-Wha
    • 패션비즈니스
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    • 제12권6호
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    • pp.93-106
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    • 2008
  • The purpose of this study is to analyze design characteristics of Chanel bags by its type and shape, material, color, pattern, decorations in order to give information about foundation of the development of Korean fashion brand handbags and help suggest predict future handbag trends. The methods of this study are documentary research and demonstrative research. For the documentary research, mainly previous researches and fashion related data were used. For the demonstrative research, the total of 288 design photos of Chanel bag were selected from 2001 S/S season to 2008 F/W season fashion collections of firstview.com., style.com., and mode et mode. The results of this study are as follows; First, type and shape of bags are clutch(30%), flap(25%), shoulder(25%), others(10%), tote(5%), hobo(5%). Second, the material data shows that leather(46%), mixed(18%), fabric(17%), synthetics (10%), patent(3%), others(3%), and suede(2%). Third, the patterns are geometrical(27%), solid(25%), combination(24%), symbolic(11%), abstract(11%), nature(2%). Fourth, the colors are largely monochrome(73%) and multicolor(27%). In case of monochrome, achromatic color(50%) is more than chromatic color(23%). The chromatic color is consisted of YR(9%), Y(9%), R(5%), RP(4%), PB(2%), P(1%), GY(0.5%), BG(0.5%). The multicolor is consisted of similar coloration(12%), contrast coloration(10%), and accent coloration(5%). Fifth, the decoration data shows that metallic(53%), plain(23%), combination(22%), and handcrafted(1%).