• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (B)
• /
• pp.388-390
• /
• 2006

This paper presents an object tracking with radical change of color. Conventional Mean Shift do not provide appropriate result when major color distribution disappear. Our tracking approach is based on Mean Shift as basic tracking method. However we propose tracking algorithm that shows good results for an object of radical variation. The key idea is iterative update previous color information of an object that shows different color by using EM algorithm. As experiment results, we show that our proposed algorithm is an effective approach in tracking for a real object include an object having radical change of color.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2004년도 학술대회지
• /
• pp.823-826
• /
• 2004

In this paper, A tracking of the moving objects using normalized hue distribution in HSI color model was proposed. Moving objects are detected by using difference image method and integral projection method to background image and objects image only with hue area. Hue information of the detected moving area are normalized by 24 levels from $0^{\circ}$ to $3600^{\circ}A$ distance in between normalized levels with a hue distribution chart of the normalized moving objects is used for the identity distinction feature parameters of the moving objects. To examine proposed method in this paper, image of moving cars are obtained by setting up three cameras at different places every 1 km on outer motorway. The simulation results of identity distinction show that it is possible to distinct the identity a distance in between normalization levels of a hue distribution chart without background.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2000년도 추계종합학술대회 논문집(4)
• /
• pp.69-72
• /
• 2000

This study proposes a new calculation method for generating real nighttime lamp-lit images. In order to improve the color appearance in the prediction of a nighttime lamp-lighted scene, the lamp-lit image is synthesized based on spectral distribution using the estimated local spectral distribution of the headlamps and the surface reflectance of every object. The principal component analysis method is introduced to estimate the surface color of an object, and the local spectral distribution of the headlamps is calculated based on the illuminance data and spectral distribution of the illuminating headlamps. HID and halogen lamps are utilized to create beam patterns and captured road scenes are used as background images to simulate actual headlamp-lit images on a monitor. As a result, the reproduced images presented a color appearance that was very close to a real nighttime road image illuminated by single and multiple headlamps.

• 제어로봇시스템학회논문지
• /
• 제22권6호
• /
• pp.463-469
• /
• 2016

This paper presents a composite camera calibration method to determine thermal degradation of power distribution equipment by combining an infrared (IR) camera and a color camera. A calibration jig was first constructed to match the properties of the two cameras. Our calibration and visualization techniques allow for the display of two images, one from the color camera and the other from the IR camera with different field of views (FOVs), on the screen at the same time. To confirm its validity, several case studies have been developed to analyze thermal deterioration limits of indoor and outdoor power distribution facilities.

• IEIE Transactions on Smart Processing and Computing
• /
• 제6권4호
• /
• pp.229-236
• /
• 2017

This paper presents an efficient object-based color image-retrieval algorithm that is suitable for the classification and retrieval of images from small to mid-scale datasets, such as images in PCs, tablets, phones, and cameras. The proposed method first finds salient regions by using regional feature vectors, and also finds several dominant colors in each region. Then, each salient region is partitioned into small sub-blocks, which are assigned 1 or 0 with respect to the number of pixels corresponding to a dominant color in the sub-block. This gives a binary map for the dominant color, and this process is repeated for the predefined number of dominant colors. Finally, we have several binary maps, each of which corresponds to a dominant color in a salient region. Hence, the binary maps represent the spatial distribution of the dominant colors in the salient region, and the union (OR operation) of the maps can describe the approximate shapes of salient objects. Also proposed in this paper is a matching method that uses these binary maps and which needs very few computations, because most operations are binary. Experiments on widely used color image databases show that the proposed method performs better than state-of-the-art and previous color-based methods.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제15권7호
• /
• pp.520-523
• /
• 2009

입력된 영상을 유해영상인지 아닌지 판단하기 위해 여러 가지 방법이 사용 될 수 있다. 현재, 대부분의 유해영상검출에 대한 연구는 피부색상이 전체영상에서 차지 하는 비율에 기반하고 있다. 본 논문에서는 YCbCr에서 피부영역을 검출 하는 기법을 제안한다. 피부영역은 YCbCr에서 특정적인 분포를 나타내는데 이를 이용하여 배경영역과 피부영역을 분리하고자 한다. 먼저 Eye-Map을 이용하여 눈의 영역을 찾은 후 그 주변 영역의 색상을 이용해 피부영역의 색상값 분포를 찾고, 전체 영상에서 그 분포와 근거리에 있는 영역들을 피부영역으로 검출하는 방식이 된다.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2001년도 추계학술대회 논문집
• /
• pp.328-331
• /
• 2001

Color simulation on a portable colorimeter was performed to distinguish quantitatively a chromaticity coordinates on a color guide of a urine strips by using the spectral power distribution of chip LED, the spectral reflectance of printed objects, and the spectral sensitivity of photodiode. The CIE tristimulus values and chromaticity coordinates realized by a colorimeter were modified to be conformable with real color reactions. Experimental results showed a real color in comparison with those obtained by Colorimeter CM2C(Color Savvy).

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2001년도 추계학술대회 논문집
• /
• pp.320-323
• /
• 2001

A computer simulation was performed to distinguish quantitatively a color reaction in a urine analysis systems by using the spectral power distribution of LEDs, the spectral reflectance of a urine strip, and the spectral sensitivity of photodiode. The CIE tristimulus values and CIE chromaticity coordinates ware modified to be conformable with real color reactions in a urine strips. Results on color simulation showed a of real color in comparison with those obtained by Colorimeter CM2C(Color Savvy).

• 정보처리학회논문지B
• /
• 제9B권5호
• /
• pp.701-706
• /
• 2002

영상의 색상 정보는 비슷한 영상들의 유사도를 효과적으로 측정하는데 사용된다. 그러나, 색상정보의 크기는 영상 데이터베이스에서 효율적으로 다루기에는 너무나 방대하다. 본 논문에서는 히스토그램 보간법에 의하여 유사한 영상들을 검색하는 새로운 방법을 제시한다 알고리즘의 기본 원리는 색상 히스토그램의 분포를 이용하여 영상을 검색하는 기존 방법에서 출발한다. 그러나, 질의 영상과 대상 영상과의 유사도를 결정하는데 있어서 보간법에 의하여 히스토그램의 분포도를 간략화 시킨다는 근본적인 차이를 가지고 있다. 색상 히스토그램의 분포는 최적 차수의 다항식으로 보간되어서 표현되었다. 히스토그램의 분포가 보간된 후에는 저차원 다항식의 계수들만이 색상 구분자로서 데이터베이스에 저장되고 검색하는데 활용될 수 있다. 제안된 방법은 실제 영상들에 적용되었으며 만족할 만한 결과를 보여주고 있다.

• 천문학회지
• /
• 제14권1호
• /
• pp.1-11
• /
• 1981

Photoelectric drift scans of nearby galaxies, M106, M31 and M33 have been made at diurnal rate with the 61cm Cassegrain Reflector at Sobacksan Observing Station. Luminosity profiles of M106 and M31 show the asymmetries between east and west sides of the galaxies and the near side of each galaxy exhibits a larger B-V color than the far side. B-V color distribution in the central part of MI06 shows somewhat unusual feature of a blue center with red surrounding regions, and this is an opposite trend to the ordinary color distribution of most of external galaxies. B-V color of M31 is nearly constant in the central part of the galaxy while U-B color decreases as the distance from the center increases.