• 한국산학기술학회논문지
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• 제10권12호
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• pp.3963-3970
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• 2009

본 연구에서는 컴퓨터를 이용하여 미술치료에서 윤곽선의 예리성으로 형태를 평가하고 컬러이미지스케일을 통해 색채를 평가하여 '부드러운-딱딱한'의 정도를 정량적으로 평가하는 방법을 제안한다. 회귀모형을 사용하며 종속 변수는 색채 전문가가 그림을 '부드러운-딱딱한'으로 평가한 순위가 된다. 독립변수는 그림의 명도 및 채도의 평균과 표준편차, 그림의 색채 수, 픽셀의 양, 클러스터의 수, 윤곽선의 길이 및 예리성 등을 고려한다. 단계별 회귀분석에 의하여 종속변수를 설명하는 적절한 독립변수들을 선정한다. 평가자 간의 신뢰성을 살피고 평가자 순위와 시스템 순위 간의 순위상관계수를 통해 시스템의 타당성을 입증한다. 객관적이고 정량적 평가를 가능케 함으로써 색채심리 연구, 미술치료뿐만 아니라 패션, 섬유, 인테리어 산업 등에 유용한 정보를 제공한다.

• 복식문화연구
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• 제25권6호
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• pp.819-830
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• 2017

This study aims to gather precise information on the real fabric color and texture, and purchasing intention of mobile shoppers buying clothes. Eighty volunteers participated in the sensory test on three smartphones with four colors and two fabrics-smooth taffeta and hairy doeskin. This study carried out the posteriori test using the one-way ANOVA and Duncan test by SPSS21.0. In the analysis' results of color preference, there were no differences among the four colors of taffeta between the smartphones, but different preferences between the red and yellow doeskin exist. In the case of the Samsung phone, which has an immense color distortion, the red fabric has a low color preference. In contrast, on the Apple phone yellow fabric had the highest preference because of its brightness. The Apple phone also has the highest purchasing intention of yellow colored taffeta, which is similar to the color preference results, although the real fabric has the opposite result. For doeskin, the real red and blue colored fabric has the highest purchasing intention. The Samsung phone has the biggest color mismatch with the real fabric. It also has the lowest purchasing intention of red taffeta fabric, while the LG phone has the lowest purchasing intention of blue fabric. Using the paired comparison method of the similarity between 'real' fabrics and the mobile version of fabric colors has a low similarity on all four colors of taffeta and doeskin fabrics. Therefore it can be concluded that phones do not represent the 'real' fabric color.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권12호
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• pp.3182-3196
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• 2012

In this paper, we present a new LED (Light Emitting Diode) mood lighting system interacting with smartphones based on the generation of different light sequences. In the proposed system, one light sequence is considered to be one unit of the service contents, which is then transmitted through a network and played in an LED lighting system. To this end, we propose a novel generation scheme using a smartphone, and a decoding/playing mechanism in an LED lighting system. The lighting sequences have a fixed period divided into predefined time units. Two modes - basic and interpolation - are supported in each time unit when playing a color sequence. In the basic mode, the color is maintained for the entire time unit, whereas in the interpolation mode the color is interpolated. The sequence is decoded and played in the lighting circuit by changing the duty cycle of a PWM (Pulse Width Modulation) signal. A demonstration system of the overall proposed method was using smartphones, a server and an LED lighting system. The results from this experiment show the validity and applicability of the proposed scheme.

• 한국해양공학회지
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• 제34권6호
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• pp.442-453
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• 2020

Underwater color images suffer from low visibility and color cast effects caused by light attenuation by water and floating particles. This study applied single image enhancement techniques to enhance the quality of underwater images and compared their performance with real underwater images taken in Korean waters. Dark channel prior (DCP), gradient transform, image fusion, and generative adversarial networks (GAN), such as cycleGAN and underwater GAN (UGAN), were considered for single image enhancement. Their performance was evaluated in terms of underwater image quality measure, underwater color image quality evaluation, gray-world assumption, and blur metric. The DCP saturated the underwater images to a specific greenish or bluish color tone and reduced the brightness of the background signal. The gradient transform method with two transmission maps were sensitive to the light source and highlighted the region exposed to light. Although image fusion enabled reasonable color correction, the object details were lost due to the last fusion step. CycleGAN corrected overall color tone relatively well but generated artifacts in the background. UGAN showed good visual quality and obtained the highest scores against all figures of merit (FOMs) by compensating for the colors and visibility compared to the other single enhancement methods.

• 대한전자공학회논문지SP
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• 제43권2호
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• pp.65-72
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• 2006

교통신호등 검출과 인식 시스템은 운전자에게 경고와 보조시스템으로 필요한 장치이다. 본 논문에서는 칼라 비젼시스템을 이용한 주행중 실시간 교통신호등의 검출과 인식법에 대해 제안하고 있다. 제안하는 방법은 크게 네 가지로 구분된다 유사색 환경에서도 신호등 빛 검출이 용이하도록 HSI 색 공간에서 채도와 밝기값의 차를 이용하여 신호등의 빛을 검출하는 신호등 검출, 신호등 외곽검출과 검출된 신호 빛을 바탕으로 교통신호등 외곽 후보영역 설정과 세 검출 결과를 토대로 교통신호등을 인식하는 부분이다. 주행중 영상을 비디오 카메라로 녹화하여 제안하는 방법에 적용하여 결과를 제시하였다. 녹화시 카메라의 줌기능을 이용하여 줌에 의한 입력 영상변화시에도 신호등을 검출 및 인식한 결과를 제시하였다.

• 정보처리학회논문지B
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• 제17B권6호
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• pp.437-444
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• 2010

본 논문에서는 한의학의 진단법인 사진법 중 망진(望診)이론을 기반으로 인체 오장 중 가장 중요한 장기의 하나인 신장의 질환 진단을 위해 영상처리기법을 적용하여 색과 신장 질환과의 상관성을 분석하는 방법을 제안하고자 한다. 이를 위해 안면 영상을 처리하고 분석하여 신장 질환에 따른 얼굴색의 색차를 시각화, 객관화하기 위한 방법을 제시하고자 한다. 특히 본 논문은 신장질환자 중 만성신부전으로 인해 혈액 투석 치료 중인 신장 기능 이상자 들을 대상으로 피 실험자 집단군을 구성하고 안면 영상 및 임상 자료를 수집하여 한의학적 망진 이론에서 신장과 관련된 얼굴 부위가 지각 이며 신장에 이상이 생길 경우 이 부위를 통해 흑색이 발현한다는 이론을 가설로 제시하고 안면 영상 중 지각 부위를 추출하는 알고리즘과 이 부위의 흑색의 변화를 측정 하는 방법에 대해 제안하고자 한다. 끝으로 임상 실험 및 자료 분석을 통해 제안한 방법의 유용성을 입증하고자 한다.

• Journal of Mechanical Science and Technology
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• 제18권11호
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• pp.2058-2065
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• 2004

A light collecting probe named Multi-color Integrated Cassegrain Receiving Optics (MICRO) is applied to spark-ignited spherical spray flames to obtain the flame propagation speed in freely falling droplet suspension produced by an ultrasonic atomizer. Two MICRO probes are used to monitor time-series signals of OH chemiluminescence from two different locations in the flame. By detecting the arrival time difference of the propagating flame front, the flame propagation speed is calculated with a two-point delay-time method. In addition, time-series images of OH chemiluminescence are simultaneously obtained by a high-speed digital CCD camera to ensure the validity of the two-point delay-time method by the MICRO system. Furthermore, the relationship between the spray properties measured by phase Doppler anemometer (PDA) and the flame propagation speed are discussed with three different experimental conditions by changing the fuel injection rate. It was confirmed that the two-point delay-time method with two MICRO probes is useful and convenient to obtain the flame propagation speed and that the flame propagation speed depends on the spray properties.

• 조명전기설비학회논문지
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• 제23권3호
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• pp.10-17
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• 2009

In this paper, we explained the relation between evaluating display device and emotional image quality evaluation in human perceptual view. It is also suggested two emotional image quality evaluation method of display reflecting human visual function. One is the color space of CIECAM02 and the other is capturing moving image. It is necessary to standardize the evaluation methods of image quality based on emotional evaluation.

• 한국측량학회지
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• 제15권1호
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• pp.41-50
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• 1997

본 연구에서는 실시간에 걸쳐서, 자동적으로 공액점들을 매칭시킬 수 있는 색상분리기법을 제시하는데 목적을 두고 있다 CCD카메라에의해 취득된 영상으로부터 계산된 상좌표는 취득된 상좌표의 정확도 와 소트를 통한 매칭의 정확도 측면에서 점검되었다. 점검결과, 연구에의하여 취득된 상좌표를 이용하여 사진측량 프로그램에 의해 계산된 대상물좌표의 RMSE는 근거리사진측량의 기대RMSE내에 분포하고 있었으며, 소트에의한 공액표정점들의 매칭 또한 정확하게 수행되었다. 따라서 본 연구에서 제시하는 색상분리기법이 정확한 상좌표의 취득과 공액점의 매칭에 적절함을 알 수 있었으며, 이 방법은 실시간에 걸쳐서 취득정보를 빠르고 정확하게 처리해야하는 산업분야에 유용할 것으로 생각된다.

• Journal of Multimedia Information System
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• 제8권1호
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• pp.1-10
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• 2021

Heart Rate is a crucial physiological parameter that provides basic information about the state of the human body in the cardiovascular system, as well as in medical diagnostics and fitness assessments. At present day, it has been demonstrated that facial video-based photoplethysmographic signal captured using a low-cost RGB camera is possible to retrieve remote heart rate. Traditional heart rate measurement is mostly obtained by direct contact with the human body, therefore, it can result inconvenient for long-term measurement due to the discomfort that it causes to the subject. In this paper, we propose a non-contact-based remote heart rate measuring approach of the subject which depends on the color intensity variation of the subject's facial skin. The proposed method is applied in two regions of the subject's face, forehead and cheeks. For this, three different algorithms are used to measure the heart rate. i.e., Fast Fourier Transform (FFT), Independent Component Analysis (ICA) and Principal Component Analysis (PCA). The average accuracy for the three algorithms utilizing the proposed method was 89.25% in both regions. It is also noteworthy that the FastICA algorithm showed a higher average accuracy of more than 92% in both regions. The proposed method obtained 1.94% higher average accuracy than the traditional method based on average color value.