3차원 이동물체의 변위평가를 위한 스테레오 비젼시스템 설계에 관한 연구

이주신 한국통신학회 1990 韓國通信學會論文誌 Vol.15 No.12

This paper described design and implementation of stereo vision system, and also, proposed method for displacement estimation of 3-D moving object using this system. The extraction of moving object is obtained by difference image algorithm. Geometrical position of 3-D moving object is calculated form the mapping of center area of two's 2-D object. 3-D coordinate position produced space depth, moving velociity, distance, moving track and proved displacement estimation of 3-D moving object. 본 논문은 스테레오비젼 시스템을 설계 제작하고, 제작된 시스템을 가지고 3차원 이동물체의 변위평가 방법을 제안하였다. 이동물체의 추출은 차영상 알고리즘에 의해 추출하고, 3차원 이동물체의 기하학적인 위치좌표는 2개의 2차원 물체의 면적중심을 합성시켜 구하였다. 3차원 이동물체의 범위평가는 합성된 3차원 좌표값에 의해서 물체의 이동속도 및 거리, 이동궤적, 카메라와 물체 사이의 공간거리를 산출하여 입증하였다.

시간솎음 알고리즘에 의한 고속이동물체 추적

이주신 청주대학교 산업과학연구소 2006 産業科學硏究 Vol.24 No.1

In this paper, the tracking of moving object by the decimation-in-time search algorithm is proposed. The proposed moving object tracking algorithm is composed of the moving direction initialization, the decimation-in-time searching algorithm and the moving object tracking. The initialization of moving direction is performed by obtaining the moving angle and the moving distance of moving objects which are detected in successive frames of the image. The decimation-in-time searching algoritlun that the moving direction of the moving object at the current frame is obtained by applying the decimation-in-time search direction mask. A prediction of the moving object on moving direction use the decimation-in-time search direction mask which is decided by obtaining the moving angle in the 8 way of search directions. The tracking of moving object is that the frames are decimated in image sequence by utilizing the decimation-in-time search direction mask, then the moving direction of the moving object is predicted. The results of the moving object tracking show that displacement coordinates error of the moving object between the proposed algorithm and the full search algorithm is less than 2 pixels on the average. Hence, the proposed algorithm can be possible to track moving object accurately, and the number of displacement search times is reduced up to 93% on the average. The processing time of the tracking is 37.4ms on the average.

Molten salt synthesis of NdAlO3 powders

이주신 한양대학교 세라믹연구소 2014 Journal of Ceramic Processing Research Vol.15 No.1

NdAlO3 powder was synthesized by reacting equimolar amounts of Nd2O3 and Al2O3 powders in NaCl or KCl salt. The synthesis temperature for NdAlO3, using NaCl or KCl salt was 1100 o C which is 500 o C lower than that in the conventional mixed-oxide method. The synthesized NdAlO3 powders retained the morphology of the original Al2O3 particles, indicating that a template formation mechanism plays an important role in the molten salt synthesis of NdAlO3.

개선된 영상의 윤곽선 보간 알고리듬

이주신 청주대학교 2009 産業科學硏究 Vol.26 No.2

Image interpolation is a common problem in imaging applications. Image interpolation is the process by which a high resolution image can be obtained from a low resolution one. In this paper, we proposes a simplify edge interpolation algorithm using the edge detector and bilinear interpolation. A hybrid approach of switching between bilinear interpolation and edge-directed interpolation is proposed in order to reduce the overall computational complexity. The performance of objective and subjective quality is also similar to the bilinear interpolation and edge-directed interpolation. Experimental results demonstrate that this suggested interpolation algorithm that utilizes a weighted edge detector can achieve reduction in complexity with minimal degradation in the interpolation results.

Molten salt synthesis of DyAlO3 powders

이주신 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.9

In this work, the molten salt synthesis technique was applied to the synthesis of DyAlO3 powder using NaCl or KCl salt as theflux. DyAlO3 powder was synthesized by reacting equimolar amounts of Dy2O3 and Al2O3 powders in NaCl or KCl salt. Thesynthesis temperature for DyAlO3 using NaCl or KCl salt was 1300 oC which is about 400 oC lower than that in theconventional mixed-oxide method. The synthesized powders have been characterized using powder X-ray diffraction (XRD)analysis and field emission scanning electron microscopy (FE-SEM). The synthesized DyAlO3 powders retained themorphology of the original Al2O3 particles, indicating that a template formation mechanism plays an important role in themolten salt synthesis of DyAlO3.

단일 이동물체 추적을 위한 능동적인 스테레오 비젼 시스템 구현

이주신 청주대학교 산업과학연구소 1996 産業科學硏究 Vol.14 No.-

In this paper, we present the stereo vision system implemented to extract single moving objects, and the improved EDC(Equi-Depth Contour) algorithm for an edge detection. The simulation is proved the active tracking and the reconstruction of 3-D moving objects. We capture images with two line light sources. So, the brightness of image plane can be minimized under 8% As a result, we improve blurring of moving objects. Then, found that our implementation can tract the moving objects having the velocity of maximum 793.3 ㎜/sec activity. The edge detection algorithm of the improved EDC is not necessary to thinning process for detection of feature parameters. we can find that our algorithm is good for 3-D reconstruction.

2차원 연속 화상내에서 물체이동 검출에 관한 연구

李周信 淸州大學校 1985 論文集 Vol.18 No.2

In this paper, for detecting the single moving object, three frames are sampled in two dimensional line sequence image the gray level of each frames is analyed and the bit data of pixels is rearranged so that the difference image is extracted. A detection of the moving object are done by the difference image extraction between the reference gray level from background and the gray level including the moving object in the identical background or the gray level after the identical object is moving. Whether the object is identical or not it is decided by the compraison of a recognition parameters in two difference images. The recognition parameters of the identical object are determined with the gray level of the object, the number of the vertex points.

자연 영상에서 얼굴영역 검출 알고리즘

이주신,Lee, Joo-shin 한국정보전자통신기술학회 2014 한국정보전자통신기술학회논문지 Vol.7 No.1

본 논문에서는 자연 영상에서 피부색 색상과 채도를 기초로 얼굴영역을 추출하고 얼굴의 특징요소를 추출하는 방법을 제안하였다. 제안한 알고리즘은 조명보정과 얼굴 검출 과정으로 구성되었다. 조명 보정 과정에서는 조명변화에 대한 보정기능을 수행한다. 얼굴 검출 과정은 20개의 피부색 표본 영상에서 색상과 채도를 특징벡터로 사용, 입력영상과의 유클리디안 거리를 구하여 피부색 영역을 추출하였다. 추출된 얼굴 후보영역을 CMY칼라 모델에서 C요소로 눈을 검출하였고, YIQ 칼라 공간에서 Q요소로 입을 검출하였다. 추출된 얼굴 후보영역에서 일반적인 얼굴에 대한 지식을 기반으로 얼굴 영역을 검출하였다. 입력받은 10장의 자연 영상으로 실험한 결과 100%의 얼굴 검출율을 보였다. In this paper, we proposed a method for face region extraction by skin-color hue, saturation and facial feature extraction in natural images. The proposed algorithm is composed of lighting correction and face detection process. In the lighting correction step, performing correction function for a lighting change. The face detection process extracts the area of skin color by calculating Euclidian distances to the input images using as characteristic vectors color and chroma in 20 skin color sample images. Eye detection using C element in the CMY color model and mouth detection using Q element in the YIQ color model for extracted candidate areas. Face area detected based on human face knowledge for extracted candidate areas. When an experiment was conducted with 10 natural images of face as input images, the method showed a face detection rate of 100%.

능동 SC 여파기 설계에 관한 연구 : switched capacitor filter 실현에 관한 연구 A study on The realization of switched capacitor filter

李周信 淸州大學校 1982 論文集 Vol.15 No.2

The switched capacitor has an performance much better than a resistor in the charcteristics of temperature and linear. In this paper, the passive RLC filter circuit can be replaced by switched capacit or of "Leapforg" type. The Error did not ocur theoretically because the approximation is not used. Therefore, passive filter can be design of SC filter exactly and The design of SC filter is using the sampled data thechnique. The theoretical value is agreedment with experemental result, and the higher sampling ratio is, the more characterisitcs of SC filter approached of passive RLC filter.

Gadolinia-doped ceria의 스파크 플라즈마 소결

이주신 경성대학교 공학기술연구소 2008 공학기술연구지 Vol.15 No.-

Dense Ce0 8Gd0 2O19 ceramics were prepared with commercially available powders by the spark plasma sintering method A higher density could be obtained at a lower temperature and shorter dwelling time The densification behavior was compared with conventionally sintered samples Dense Ce0 8Gd0 2O19 ceramics with 96% of the theoretical density could be obtained by the spark plasma sintering technique at 1200 C for 5min, whereas conventional sintering needed to be sintered at 1550 Cfor 5hr in order to obtain an equivalent theoretical density.