• Journal of IKEEE
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• v.21 no.4
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• pp.412-415
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• 2017

In this paper, we propose a multi license plate recognition system using high resolution $360^{\circ}$ omnidirectional IP camera. The proposed system consists of a planar division part of $360^{\circ}$ circular image and a multi license plate recognition part. The planar division part of the $360^{\circ}$ circular image are divided into a planar image with enhanced image quality through processes such as circular image acquisition, circular image segmentation, conversion to plane image, pixel correction using color interpolation, color correction and edge correction in a high resolution $360^{\circ}$ omnidirectional IP Camera. Multi license plate recognition part is through the multi-plate extraction candidate region, a multi-plate candidate area normalized and restore, multiple license plate number, character recognition using a neural network in the process of recognizing a multi-planar imaging plates. In order to evaluate the multi license plate recognition system using the proposed high resolution $360^{\circ}$ omnidirectional IP camera, we experimented with a specialist in the operation of intelligent parking control system, and 97.8% of high plate recognition rate was confirmed.

• Journal of IKEEE
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• v.22 no.1
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• pp.68-73
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• 2018

In this paper, we propose an efficient algorithm for mapping a $360^{\circ}$ circular image to a planar image. The proposed algorithm consists of obtaining size of the planar image, calculating the distance between the camera and the planar image, calculating horizontal angle of camera and planar image, calculating vertical angle between camera and planar image, calculating the position of a pixel that matches pixels in a $360^{\circ}$ circular image to pixels in a planar image. Experiments were performed to evaluate the efficient algorithm for mapping the proposed $360^{\circ}$ circular image to the plane image. The reconstruction rate of the mapped plane image was confirmed 99% and the image quality of the mapped plane image was confirmed 72%. Since the results were higher than the standard values of commercial software, the effectiveness of the algorithm was confirmed.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.3-5
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• 2017

가상 현실 시장은 꾸준한 성장을 하고 있다. 가상 현실 시장이 성장함에 따라 게임 엔진을 이용한 가상 현실콘텐츠 뿐만 아니라 실제 특수 디바이스를 이용하여 촬영한 $360^{\circ}$ 비디오 콘텐츠 시장도 성장하고 있다. 하지만 실제로 촬영한 $360^{\circ}$ 비디오같은 경우 4D 가상 현실 콘텐츠를 즐기기 위해서는 먼저 특수 장치와 $360^{\circ}$ 비디오 간의 이벤트를 정의해야 하는 성가심이 있다. 이러한 불편함을 극복하기 위해 물리적 감각 효과를 일으키는 객체를 인식하고 서술하는 기법을 제시한다. $360^{\circ}$비디오 내의 감각 효과를 일으키는 객체를 인식하고 좌표계 내에 위치를 설정하여 사용자와의 거리가 임계값 이하면 효과를 일으키게 하여 사전에 콘텐츠를 확인하고 감각 효과를 미리 설정하는 번거로움을 없앨 수 있다.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1496-1501
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• 2004

Recently, many Korean firms have been adopting 360$^{circ}$ Degree Feedback System with the environmental change in business world. The reason is that the traditional top-down way of personnel evaluation pattern can not but has many limits in this turbulent changing environment. The main purpose of this article is to depict some aspects of 360$^{circ}$ Degree Feedback System including its current status quo, its positive and negative side, and the effective way of its improvement focusing on A firm.

• International Journal of High-Rise Buildings
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• v.8 no.4
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• pp.303-311
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• 2019

The effectiveness of aerodynamic modification to reduce wind loadings has been widely reported. However, most of previous studies have been investigated dynamic forces and pressure distributions on tall buildings with various unconventional configurations. This study was investigated dynamic characteristics and aerodynamic instability of super-tall buildings with unconventional configurations through extensive aeroelastic model experiments. Seventeen types of supertall building models were considered such as basic and corner modification with corner cut, chamfered, oblique opening, tapered, inversely tapered, bulged, helical with twist angles of $90^{\circ}$, $180^{\circ}$, $270^{\circ}$, $360^{\circ}$ and composite with $360^{\circ}$ helical & corner cut, 4-tapered & $360^{\circ}$ helical & corner cut, setback & corner cut, setback & $45^{\circ}$ rotate. As a result, aerodynamic characteristics of helical models with single modification are superior to those of other models with single modification. However, effect of twist angle for helical model is negligible. Further, the 4-tapered & $360^{\circ}$helical & corner cut model is most effective in reducing the along- and across-wind fluctuating displacement responses in all of experimental models.

• Journal of the Korea Institute of Military Science and Technology
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• v.3 no.1
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• pp.231-236
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• 2000

The wall thickness of the Ti-6Al-4V Large-Diameter Seamless Tube, which is supposed to be a very important parameter in a system design, was measured during $360^{\circ}$ cold bending processes. The factors or processes affecting the wall thickness include 1) primary bending, 2)secondary or finishing step of the $360^{\circ}$ bending, 3)cleaning processes in CERO TRUTM(CT)process. But thinning effects of the wall thickness during the cleaning processes are negligible compared to those during the formers. The variations in the percentages of the change in wall thickness were found to be from -14% to +16%.

• Journal of the Korea Institute of Military Science and Technology
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• v.3 no.1
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• pp.176-182
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• 2000

$360^{\circ}$ bending of Ti-6Al-4V large-diameter seamless tube(62.37 mm $OD {\times} 4.40mm$ wall thickness) has been achieved at room temperature without heating. The bending process comprised two steps : the first step is $360^{\circ}$ bending by an uniquely designed rotary bender allowing spring back, which is subsequently eliminated by the second or finishing step which comprised repeated bending processes by powered three roll bender, In odor to prevent collapse of tube during bending, Cerro $Tru^{TM}$(Trade name of a non-ferrous low melting point alloy)has been employed as a filler metal. The resultant ovality(out of roundness) obtained was 1.28%, as compared with 6~8% without applying Cerro $Tru^{TM}$.

• Journal of the Korean Society for Railway
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• v.9 no.5 s.36
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• pp.569-576
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• 2006

Recently, many Korean firms have been adopting $360^{\circ}$ Degree Feedback System as a way of adapting to the environmental changes in business world. The reason is that the traditional top-down way of personnel evaluation pattern can not but have many limits in this turbulent changing environment. The main purpose of this article is to depict some aspects of $360^{\circ}$ Degree Feedback System including its current status quo, its positive and negative side, and the effective ways of its improvement focusing on the railway-related "A firm".

• Journal of Digital Convergence
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• v.17 no.11
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• pp.531-536
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• 2019

The Ministry of the Interior and Safety amends the enforcement ordinance of the public service design method and applies it to the project tasks of each institution and cases of social problem solving and public service innovation are increasing according to service design methodology. This study is to develop the $360^{\circ}$ VR content element in order to deliver the understanding and effective improvement of the service to the consumers in the process of problem discovery and the prototype that visualize the key solution according to the service design methodology. By applying it to the actual public service design project, it was possible to predict the result with high satisfaction after improvement. This paper is meaningful in that it proposes new approach and empirical value to consumers and contribute to the improvement of the service design process as a convergence study on the future service design using the $360^{\circ}$ VR prototype.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.95-96
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• 2006

This study examined the effects of the tempering temperatures($360-420^{\circ}C$) on the mechanical properties of the carbon tool steel (SK4M) for flat spring. Hardness test, tensile test and fatigue test were performed at room temperature($20^{\circ}C$). The tensile strength and yield strength of $390^{\circ}C\;and\;420^{\circ}C$ tempered SK5M were 0.93-0.97 times and 0.81-0.87 times those of $360^{\circ}C$ tempered SK5M, respectively. The fatigue limit of $360-420^{\circ}C$ tempered SK5M were 35-40% of tensile strength of $360-420^{\circ}C$ tempered SK5M, respectively.