• Title/Summary/Keyword: texture analysis

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Automated Prostate Cancer Detection on Multi-parametric MR imaging via Texture Analysis (다중 파라메터 MR 영상에서 텍스처 분석을 통한 자동 전립선암 검출)

  • Kim, YoungGi;Jung, Julip;Hong, Helen;Hwang, Sung Il
    • Journal of Korea Multimedia Society
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    • v.19 no.4
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    • pp.736-746
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    • 2016
  • In this paper, we propose an automatic prostate cancer detection method using position, signal intensity and texture feature based on SVM in multi-parametric MR images. First, to align the prostate on DWI and ADC map to T2wMR, the transformation parameters of DWI are estimated by normalized mutual information-based rigid registration. Then, to normalize the signal intensity range among inter-patient images, histogram stretching is performed. Second, to detect prostate cancer areas in T2wMR, SVM classification with position, signal intensity and texture features was performed on T2wMR, DWI and ADC map. Our feature classification using multi-parametric MR imaging can improve the prostate cancer detection rate on T2wMR.

Microstructural analyses of soyprotein fibers (대두 단백섬유의 미세구조 연구)

  • Kim, J.C.;Cho, S.J.;Byun, P.H.;Yoon, S.K.;Rhee, K.C.;Byun, S.M.
    • Applied Biological Chemistry
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    • v.34 no.4
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    • pp.353-359
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    • 1991
  • As a tool for the texture analyses of the soyprotein fibers, the scanning electron microscopical microstructure were studied. With the results of TPA(Texture Profile Analysis), microstructural analyses of the soyprotein fibers showed that the disulfide and hydrogen bonds are one of the most important factors determining the shape and maintenance of fiber struture. The microstructures of the hydrated soyprotein dispersion and dope, as starting materials of the soyprotein fiber were presented.

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Quality Characteristics of Jeungpyun with Different Ratios of Makkulli Leaven to Water (막걸리와 물의 첨가비율에 따른 증편의 품질특성)

  • 윤숙자
    • Korean journal of food and cookery science
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    • v.19 no.1
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    • pp.11-16
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    • 2003
  • Jeungpyun was prepared with different ratios of makkulli leaven to water in order to examine the changes in its quality characteristics. The results on the height and volume of the samples showed that Jeungpykn prepared with the ratio of 1 makkulli leaven to 2 water showed the highest degree of fermentation. Texture profile analysis, Hunter's color and sensory evaluation of jeungpyun were carried out for 4 days from the day of its steaming, to see its quality changes. In texture profile analysis, the hardness, gumminess and chewiness increased in all samples as the time elapsed, and at the same time texture parameters were increased as the water ratio increased. As the water ratio increased, L value was increased; however, a value and b value were decreased. The results of sensory evaluation showed that Jeungpyun prepared with the ratio of 1 makkulli leaven to 2 water had the most favorable sensory qualities.

Evaluation of Apple Freshness by Characterizing Surface Texture of Cells (세포 표면 특성을 이용한 사과 신선도 평가)

  • 조용진
    • Journal of Biosystems Engineering
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    • v.22 no.4
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    • pp.433-438
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    • 1997
  • The freshness of apple was evaluated by characterizing the surface texture of flesh cells. The freshness index which was related to the amount of wrinkles on the cell surface was defined to quantify the freshness. Four parameters relevant to the amount of the cell wrinkles were selected and measured using image analysis including wrinkle extraction procedure and Fast Fourier Transform of a wrinkle-extracted image. Out of 4 parameters, three parameters had highly significant correlations with the time elapsed after harvest. But it was concluded that two parameters out of such 3 parameters could be used for description of freshness index.

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Analysis on Inhomogeneous Textures Developed in Aluminum AA 1050 Sheets during Continuous Confined Strip Shearing (알루미늄 AA 1050 판재구속전단가공 시 불균질 집합조직 형성의 해석)

  • 이재필;석한길;허무영
    • Transactions of Materials Processing
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    • v.13 no.4
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    • pp.382-387
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    • 2004
  • The continuous confined strip shearing (CCSS) based on the equal channel angular pressing (ECAP) was modeled by means of a rigid-plastic two-dimensional finite element method (FEM). Parallel to the simulations, samples of AA 1050 sheets were experimentally deformed by CCSS. The CCSS deformation led to the formation of through thickness texture gradients comprising a strong shear texture in the sheet center and weak shear textures in the sheet surfaces. FEM analysis revealed variations in the strain component $\varepsilon_13$ along the sample thickness direction, which gave rise to the evolution of different textures. A high friction between the sample and die surface was responsible for lowering intensities of the shear texture components in thickness layers close to the surfaces.

Analysis of Macroscopic Forming Process on the Basis of Microscopic Crystal Plasticity (미시적 결정소성학에 의거한 거시적 성형공정 해석)

  • 여은구;이용신
    • Journal of the Korean Society for Precision Engineering
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    • v.15 no.5
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    • pp.167-175
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    • 1998
  • A mathematical formulation is presented to model anisotropy from the deformation textures developed in a forming process. In this work, a micro-mechanical-based polycrystalline analysis is implemented into a consistent finite element method for the anisotropic, viscoplastic deformation of polycrystalline metals. As suggested by Taylor, the deformation of each grain in an aggregate is assumed to be same as the macroscopic deformation of an aggregate or a macro-continuum point. Algorithms are developed to represent the plastic anisotropy, such as the anisotropic yield surface and R-value, from the predicted deformation texture. As applications, the evolution of texture in rolling, upsetting and drawing/extrusion processes are simulated and the corresponding changes of mechanical properties such as yield surface and R-value are predicted.

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Development and Evaluation of Stitching Algorithm With five Degrees of Freedom for Three-dimensional High-precision Texture of Large Surface (대면적/고정밀 3차원 표면형상의 5자유도 정합법 개발 및 평가)

  • Lee, Dong-Hyeok;Ahn, Jung-Hwa;Cho, Nham Gyoo
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.23 no.2
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    • pp.118-126
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    • 2014
  • In this paper, a new method is proposed for the five-degree-of-freedom precision alignment and stitching of three-dimensional surface-profile data sets. The control parameters for correcting thealignment error are calculated from the surface profile data for overlapped areas among the adjacent measuring areas by using the "least squares method" and "maximum lag position of cross correlation function." To ensure the alignment and stitching reliability, the relationships betweenthe alignment uncertainty, overlapped area, and signal-to-noise level of the measured profile data are investigated. Based on the results of this uncertainty analysis, an appropriate size is proposed for the overlapped area according to the specimen's surface texture and noise level.

Textural Characterization of Gel Layer Thickness and Swelling Boundary in a Hydrophilic Compact (친수성 정제의 겔층두께와 겔팽창 영역의 조직 특성화)

  • Kim, Hyun-Jo;Fassihi, Reza
    • Journal of Pharmaceutical Investigation
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    • v.31 no.1
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    • pp.13-18
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    • 2001
  • This study was to investigate the relationship between the gel layer thickness and swelling boundary via strength measurements using texture analysis. The novel texture analysis approach was used to examine the dynamics of swelling behavior in a ternary polymeric matrix tablet. The method permitted the characterization of the changes occurring at the peripheral as well as within interior boundary of the swelling during water ingress. The increase in gel strength for pectin, HPMC, and a ternary mixture with gelatin was found to depend on polymer concentration. Therefore, this method is further applicable to characterize the swelling behavior and provide opportunity to differentiate the gel-layer from that of swelling boundary.

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A Study of the relationship between Fashion Sensibility and Formative Properties in Clothing (패션감성과 의복조형성의 관계 연구)

  • 이경희;김유진
    • Journal of the Korean Society of Clothing and Textiles
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    • v.25 no.5
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    • pp.845-855
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    • 2001
  • Now the most important thing in fashion industry is find out the fashion sensibility and preference of customers exactly. Thus it is needed that fashion sensibility is connected with formative properties in clothing. The purpose of this study is to clarify the relationship between the fashion sensibility and the formative properties in clothing. 91 kinds of costume samples have been selected from photographs in fashion magazines under color combination, inside form, texture, pattern type in clothing. I have measured fashion sensibility by using Semantic Differential method. The obtained data were analyzed by GLM, discriminant analysis. The results of analysis are as follow; 1. The discriminative images were significant difference in formative properties - color combination was related to attractiveness, inner form to decorativeness, pattern to harmony and texture to surface of soft and hard in clothing. 2. fashion sensibility was significant relationship with formative properties especially inner form in clothing. And the trimming was identified as gorgeous and feminine. 3. Preference, Buying needs, Riches and Pleasant were significant relationship with formative properties in clothing especially color combination and texture.

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Quality Characteristics of Yanggaeng Prepared with Different Amounts of Astragalus membranaceus Powder (황기가루 첨가량에 따른 양갱의 품질 특성)

  • Min, Sung-Hee;Park, Ok-Jin
    • Journal of the East Asian Society of Dietary Life
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    • v.18 no.1
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    • pp.9-13
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    • 2008
  • This study was performed to investigate the quality characteristics of yanggaeng prepared with different ratios of Astragalus membranaceus powder : 2%, 4%, and 6%. Proximate composition, Hunter's color values, texture profile analysis, and sensory qualities were examined. The lightness of the yanggaeng decreased with increasing Astragalus membranaceus powder content. For the texture profile analysis, hardness increased with increasing Astragalus membranaceus powder content. In terms of sensory qualities, the 2% Astragalus membranaceus powder sample did not influence any of the sensory attributes of the yanggaeng.

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