• 제목/요약/키워드: Park Image

검색결과 7,740건 처리시간 0.035초

융기된 영상의 골격선 추출에 의한 에지 보정 알고리듬 (Edge Compensation Algorithm by Extracting the Skeletons from the Uplifted Image)

  • 박미진;양영일;박중조
    • 대한전자공학회논문지SP
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    • 제38권6호
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    • pp.675-683
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    • 2001
  • 본 논문에서는 에지 영상의 정보를 잃지 않으며 인접한 에지를 연결하는 에지 보정 알고리듬을 제안하였다. 제안된 에지 보정 알고리듬은 두 단계로 구성되어 있다. 첫 단계는 에지 영상을 반복적으로 융기시켜 융기 영상을 얻는 단계이며, 두 번째 단계는 골격선 추출 알고리듬을 이용하며 융기된 영상으로부터 에지 영상을 추출하는 단계로 이루어져 있다. 실험 결과는 제안된 방법이 다른 방법에 비해 원래의 에지 영상의 정보를 왜곡시키지 않으면서 인접한 에지를 잘 연결함을 보여준다.

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병렬처리 기반 정지영상 인식자 생성 (Parallel Processing based Image Identifier Generation)

  • 고미은;박제호;박용범;서원택
    • 반도체디스플레이기술학회지
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    • 제16권1호
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    • pp.6-10
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    • 2017
  • Recent enhancement in the still image acquisition devices has been widely perpetrated into the daily life of the common people. Due to this trend, the voluminous still images, that are produced and shared in the personal or the massive storage, need to controlled with effective and efficient management. The human-devised or system-generated still image identifiers used for the identification of the images are at risk in the situation of unexpected changing or eliminating of the identifiers. In this paper, we propose a parallel processing based method for still image identifier generation by utilizing the still image internal features.

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임베디드 마이크로 프로세서 기반의 웨이블릿 영상 부호화기 (The wavelet image coder based on the embedded microprocessor)

  • 박성욱;김영봉;박종욱
    • 전기학회논문지P
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    • 제51권4호
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    • pp.198-205
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    • 2002
  • In this paper, we proposed a wavelet image coder based on the portable embedded microprocessor. The proposed coder stores the bit level information of the wavelet coefficient in the 2D significance array. Using this information, the coder make the significance check for coefficient and bit level scanning at the same pass. The proposed method has the advantage that we can reduce the scan iteratively and the memory usage for the coding process. Experimental results show that the proposed method outperforms popular image coders such as JPEG, EZW and SPIHT in based on the portable embedded system environment.

수색 구조 로봇을 위한 적외선 영상 기반 인명 인식 (Infrared Image Based Human Victim Recognition for a Search and Rescue Robot)

  • 박정길;이근재;박재병
    • 제어로봇시스템학회논문지
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    • 제22권4호
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    • pp.288-292
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    • 2016
  • In this paper, we propose an infrared image based human victim recognition method for a search and rescue robot in dark environments, like general disaster situations. For recognizing a human victim, an infrared camera on a RGB-D camera, Microsoft Kinect, is used. The contrast and brightness of the infrared image are first improved by histogram equalization, and the noise on the image is removed by morphological operation and Gaussian filtering. For recognizing a human victim, the binarization and blob labeling methods are applied to the improved image. Finally, for verifying the effectiveness and feasibility of the proposed method, an experiment for human victim recognition is carried out in a dark environment.

A Study on Linking Korean Wave and Corporate Image on Country Image, Perceived Quality: A Study of China

  • Kim, Sang Mook;Kim, Joo Nam;Park, Min Jae
    • Asia Marketing Journal
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    • 제20권1호
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    • pp.69-87
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    • 2018
  • This study examines the linkage between Korean wave, corporate image and country image, perceived quality of products made in the country. To close a gap lacking empirical studies on impacts of corporate image to country image and to further understand impacts of Korean wave, this study conducts survey over Chinese consumers to test the effects of corporate image, Korean wave to the country image, and verify on its effects to perceived quality of the products made in the country. The results show that both corporate image and Korean wave influences to form positive country image of Korea, and perceived quality of Korean made products. The size of effects varies upon products type and stimuli. This study could provide policy makers insights how to promote country image as well as support SMEs for developing overseas markets. Also, it could give marketers valuable implications to develop effective global marketing strategies using cultural assets, country image and salient corporate image.

초소형 카메라 흔들림 보정장치의 동특성 개선 (Improvement of Dynamic Characteristics of an Optical Image Stabilizer in a Compact Camera)

  • 송명규;손동훈;박노철;박경수;박영필
    • 한국소음진동공학회논문집
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    • 제21권2호
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    • pp.178-185
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    • 2011
  • Optical image stabilization is a device to compensate the camera movement in the exposure time. The compensation is implemented by movable lens or image sensor that adjusts the optical path to the camera movement. Generally, the camera is moved by a handshake, thus the handshake is considered as an external disturbance. However, there are many other vibrations such as car and train vibration. In this paper, the optical image stabilization system in high frequency region is presented. Notch filter and lead compensator are designed and applied to improve the stability without changing the actuator. To verify the performance of the optical image stabilization system in high frequency region, the experiment equipment with moving object is established. It is confirmed that the opticalimage stabilization system does not diverge at the resonance frequency.

모바일 카메라 모듈용 볼베어링 방식 OIS 액추에이터 설계 (Design of Ball Bearing Type OIS Actuator for Mobile Camera Module)

  • 송명규;손동훈;박노철;박경수;박영필;임수철
    • 한국소음진동공학회논문집
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    • 제20권4호
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    • pp.361-372
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    • 2010
  • Optical image stabilization is a technique to compensate the image blurring caused by some vibrations of camera at the exposure time. Pitching and yawing of camera are sensitive to the image quality so they are usually compensated by optical image stabilization. Corresponding pitching and yawing of a camera, a lens or the image sensor is translated in two-axis direction and then the optical path of camera is adjusted. In this paper, two-axis OIS actuator for mobile camera module is suggested and designed. The actuator is a voice-coil actuator that uses the electromagnetic force of voice-coil to make compensation motions. And ball bearing is used to reduce friction force. Magnetic attractive force between magnets and yokes acts as a preload and magnet springs. Prototype actuator is fabricated to measure the friction force and to verify the feasibility of the OIS actuator with ball bearing. At last, the actuator is improved in consideration of driving force and friction force. Design of experiments is used for designing the actuator.

Image Retrieval via Query-by-Layout Using MPEG-7 Visual Descriptors

  • Kim, Sung-Min;Park, Soo-Jun;Won, Chee-Sun
    • ETRI Journal
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    • 제29권2호
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    • pp.246-248
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    • 2007
  • Query-by-example (QBE) is a well-known method for image retrieval. In reality, however, an example image to be used for the query is rarely available. Therefore, it is often necessary to find a good example image to be used for the query before applying the QBE method. Query-by-layout (QBL) is our proposal for that purpose. In particular, we make use of the visual descriptors such as the edge histogram descriptor (EHD) and the color layout descriptor (CLD) in MPEG-7. Since image features of the CLD and the EHD can be localized in terms of a$4{\times}4$ sub-image, we can specify image features such as color and edge distribution on each sub-image separately for image retrieval without a query image. Experimental results show that the proposed query method can be used to retrieve a good image as a starting point for further QBE-based image retrieval.

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광공진 현상을 이용한 입체 영상센서 및 신호처리 기법 (Optical Resonance-based Three Dimensional Sensing Device and its Signal Processing)

  • 박용화;유장우;박창영;윤희선
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2013년도 추계학술대회 논문집
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    • pp.763-764
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    • 2013
  • A three-dimensional image capturing device and its signal processing algorithm and apparatus are presented. Three dimensional information is one of emerging differentiators that provides consumers with more realistic and immersive experiences in user interface, game, 3D-virtual reality, and 3D display. It has the depth information of a scene together with conventional color image so that full-information of real life that human eyes experience can be captured, recorded and reproduced. 20 Mega-Hertz-switching high speed image shutter device for 3D image capturing and its application to system prototype are presented[1,2]. For 3D image capturing, the system utilizes Time-of-Flight (TOF) principle by means of 20MHz high-speed micro-optical image modulator, so called 'optical resonator'. The high speed image modulation is obtained using the electro-optic operation of the multi-layer stacked structure having diffractive mirrors and optical resonance cavity which maximizes the magnitude of optical modulation[3,4]. The optical resonator is specially designed and fabricated realizing low resistance-capacitance cell structures having small RC-time constant. The optical shutter is positioned in front of a standard high resolution CMOS image sensor and modulates the IR image reflected from the object to capture a depth image (Figure 1). Suggested novel optical resonator enables capturing of a full HD depth image with depth accuracy of mm-scale, which is the largest depth image resolution among the-state-of-the-arts, which have been limited up to VGA. The 3D camera prototype realizes color/depth concurrent sensing optical architecture to capture 14Mp color and full HD depth images, simultaneously (Figure 2,3). The resulting high definition color/depth image and its capturing device have crucial impact on 3D business eco-system in IT industry especially as 3D image sensing means in the fields of 3D camera, gesture recognition, user interface, and 3D display. This paper presents MEMS-based optical resonator design, fabrication, 3D camera system prototype and signal processing algorithms.

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영상데이터의 안전한 전송을 위한 부분 영상 암호화 시스템 설계 (Partial image encryption system design for secure transmission of images)

  • 박시찬
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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    • pp.132-134
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    • 2004
  • This paper proposes partial image encryption system for secure transmission of images. Partial image encryption is suitable for real-time processing purpose of multimedia data that needs compression and encryption. Compression part uses modified SPIHT algorithm and encryption part uses AES. Partial image encryption is significant reduction in encryption time in comparison with whole image encryption.

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