• Journal of Electrical Engineering and Technology
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• 제12권1호
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• pp.436-442
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• 2017

A novel method of Skin lesion segmentation based on the combination of Texture and Neural Network is proposed in this paper. This paper combines the textures of different pixels in the skin images in order to increase the performance of lesion segmentation. For segmenting skin lesions, a two-step process is done. First, automatic border detection is performed to separate the lesion from the background skin. This begins by identifying the features that represent the lesion border clearly by the process of Texture analysis. In the second step, the obtained features are given as input towards the Recurrent Echo state neural networks in order to obtain the segmented skin lesion region. The proposed algorithm is trained and tested for 862 skin lesion images in order to evaluate the accuracy of segmentation. Overall accuracy of the proposed method is compared with existing algorithms. An average accuracy of 98.8% for segmenting skin lesion images has been obtained.

• 한방안이비인후피부과학회지
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• 제28권1호
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• pp.100-108
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• 2015

Objectives : This study was planned to examine the enhancing effect of Coptidis Rhizoma mask pack on water, oil contents and skin texture, and to check the possibility of commercialization. Methods : We measured the change of water, oil contents and skin texture before and after the use of Coptidis Rhizoma mask pack. Measuring was conducted twice at an interval of ten days using accurate SK-03 skin analyzer. Measuring site was right and left SI18 and CV24 acupoints. Results : We can examine the improvement of water, oil contents and skin texture on every acupoints measured, except for CV24. On CV24, no difference was observed from water contents of both 1st, 2nd visit, and skin texture of 1st visit. Conclusions : We could confirm the boosting effect of Coptidis Rhizoma mask pack on water, oil contents and skin texture, especially around the SI18 acupoints. We should take follow-up measures to improve the absorption of a liquid herbal medicine around the CV24 acupoint, and heighten the potential for commercialization.

• Journal of Radiation Protection and Research
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• 제48권3호
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• pp.144-152
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• 2023

Background: Color texture analysis was applied as a tool for quantitative evaluation of radiation-induced skin injuries. Materials and Methods: We prospectively selected 20 breast cancer patients who underwent whole-breast radiotherapy after breast-conserving surgery. Color images of skin surfaces for irradiated breasts were obtained by using a mobile skin analyzer. The first skin measurement was performed before the first fraction of radiotherapy, and the subsequent measurement was conducted approximately 10 days after the completion of the entire series of radiotherapy sessions. For comparison, color images of the skin surface for the unirradiated breasts were measured similarly. For each color image, six co-occurrence matrices (red-green [RG], red-blue [RB], and green-blue [GB] from color channels, red [R], green [G], blue [B] from gray channels) can be generated. Four textural features (contrast, correlation, energy, and homogeneity) were calculated for each co-occurrence matrix. Finally, several statistical analyses were used to investigate the performance of the color textural parameters to objectively evaluate the radiation-induced skin damage. Results and Discussion: For the R channel from the gray channel, the differences in the values between the irradiated and unirradiated skin were larger than those of the G and B channels. In addition, for the RG and RB channels, where R was considered in the color channel, the differences were larger than those in the GB channel. When comparing the relative values between gray and color channels, the 'contrast' values for the RG and RB channels were approximately two times greater than those for the R channel for irradiated skin. In contrast, there were no noticeable differences for unirradiated skin. Conclusion: The utilization of color texture analysis has shown promising results in evaluating the severity of skin damage caused by radiation. All textural parameters of the RG and RB co-occurrence matrices could be potential indicators of the extent of skin damage caused by radiation.

• 전기전자학회논문지
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• 제14권4호
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• pp.332-338
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• 2010

영상 처리를 통한 특징 추출은 영상 검색, 객체 인식, 영상 인덱싱을 포함하는 다양한 분야에서 전처리 과정으로 사용되어 왔다. 특히, 영상 질감 분석에서는 질감 특성 추출을 더 용이하게 하기 위해 질감의 대비를 증가시키는 방법을 사용한다. 생체 현미경 영상에서 두드러진 질감중의 하나는 주름이며 주름의 특징은 노화 관련 응용에 유용한 정보를 다양하게 제공한다. 본 논문에서는 피부 영상에서 나이 관련 특징을 추출하는 기존 방법을 개선하여 피부 나이 측정의 정확도를 높이는 방법을 제안한다.

• 대한화장품학회:학술대회논문집
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• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book II
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• pp.286-293
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• 2003

In cosmetic formulations, texture plays a key role in ingredient choice and formulation optimization. But texture parameters are often measured by sensorial analysis in the last stages of formulation development. Rheology or texture analysis, used separately, has the benefit of characterizing the behavior of raw materials (e.g. polymers) and controlling and predicting the stability of formulations. SEPPIC has developed rheology and texture analysis protocols to obtain a better understanding of the influence of raw materials on the cosmetic texture of formulations. When used in combination, these two methodologies are complementary and provide useful data regarding the impact of raw material choice on all the development steps: manufacturing procedure, formulation stability, skin feeling.

• 한국자동차공학회논문집
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• 제14권2호
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• pp.57-66
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• 2006

AA5182-polypropylene sandwich sheet was manufactured, and the mechanical properties evaluation was executed in order to identify $L{\ddot{u}}ders$ band that causes fabrication process problem and especially surface roughness. To identify formability, deformation behavior, plastic strain ratio (R-value) and pole figure were measured, and texture analysis was performed. In the case of sandwich sheet, the unstable deformation behavior has decreased. As well, for sandwich sheet, A1 skin could manage the most of load, and the elongation has improved about 45% more than that of A1 skin. The plastic strain ratio of A1 skin and sandwich panel, which indicates serration behavior, was obtained from instantaneous plastic strain ratio evaluation. Also, the planar anisotropy of sandwich sheet has decreased more than that of A1 skin. According to these results, the sandwich sheet produced lightening effect and could control unstable deformation characteristic, that is, surface roughness caused by $L{\ddot{u}}ders$ band. Furthermore, it was proved that the texture control of the rolling attachment of A1 skin is necessary to improve the formability of the sandwich panel.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2753-2758
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• 2003

Tactile sensation is essential for many manipulation and exploration tasks not only in a real environment but also in a virtual environment. In this paper, we discuss a conceptual design of an integrated tactile display system. The system comprises two parts: a 2 DOF force feedback device for kinesthetic display and a tactile feedback device for displaying the normal stimulation to skin and the skin slip/stretch. Psychophysical experiments measure the effects of fingerpad selection, the direction of finger movements and the texture width on tactile sensitivity. We also investigate characteristics of lateral finger movement while subjects perceive different textures. From the experimental results, the principal parameters for designing a tactile display are suggested. A tactile display device is implemented using eight piezoelectric bimorphs and a linear actuator, and is attached to a 2 DOF translational force feedback device to simultaneously simulate texture and stiffness of the object.

• 한국조리학회지
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• 제19권3호
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• pp.33-45
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• 2013

본 연구는 커피 실버스킨을 밀가루 중량에 대해서 0%, 3%, 5%, 7%로 대체 첨가하여 옐로우 레이어 케이크의 특성을 알아보았다. 반죽의 비중은 실버스킨 첨가량이 증가할수록 유의적으로 증가하였으며, 비용적은 실버스킨 함량이 많을수록 유의적으로 감소하였다. 부피지수는 실버스킨 첨가량이 증가함에 따라 유의적으로 감소하였으며, 대칭지수와 균일지수는 유의적인 차이가 없었다. 대조구의 부피지수, 대칭지수와 균일지수가 가장 높게 측정되었다. 조직감에서는 대조구가 가장 낮은 경도와 가장 높은 탄력성을 나타내었다. 시간이 경과함에 따라 실버스킨 첨가량이 많을수록 경도는 높아졌으나 탄력성은 낮아졌다. 관능검사 결과, 조직감을 제외한 모든 항목에서 대조구에 비해 실험군의 수치가 높았으며, 그 중에서 향과 맛은 SS5가 가장 높았고 외관과 전체적인 기호도는 SS3이 가장 높았다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.655-658
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• 2009

Fractal dimension has been used for texture analysis as it is highly correlated with human perception of surface roughness and applied to quantifying the structures of wide range of objects in biology and medicine. On the other hand, the evaluation of the human skin state is based solely on the subjective assessment of clinicians; this assessment may vary from moment to moment and from rater to rater. Therefore we attempt to analysis of skin texture image using fractal dimension and discuss its application to evaluating human skin state. It can be helpful for extracting human features and also can be useful for detection of many human skin diseases. This paper presents a method to calculate fractal dimension of skin with use of camera lens magnification. We take multiple pictures frequently from skin with different camera lens magnification as a magnification factor of fractal set, and counting the number of objects (cells) in each picture as a number of self similar pieces of fractal set.

• Archives of Plastic Surgery
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• 제34권1호
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• pp.70-76
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• 2007

Purpose: Full-thickness skin grafts are usually used in facial reconstruction, but on occasion, split-thickness skin graft is also used from the scalp due to the limitation of donor site. However, there were complications, such as alopecia, folliculitis and blood loss. In addition, it can not be used in patients with baldness. Under the circumstances, we used medial arm skin as split-thickness skin graft donor site in lieu of scalp. We investigated the efficacy of the medial arm skin as a donor site of facial skin graft in comparison with scalp. Methods: From 2000 to 2005, the split-thicknesss skin grafts were performed using the medial arm skin in 10 patients and the scalp in 10 patients. We inspected the skin color match, texture match by the visual analogue scale. Scar contracture was estimated by the Visitrak $grade^{(R)}$(Smith & Nephew). The statistical analysis was performed by SPSS 12.0. Results: There was a more satisfaction in color match, texture, and scar contracture in medial arm skin than in scalp. Conclusion: According to these results, medial arm skin may be used efficiently as an alternative donor site of scalp in the facial reconstruction.