• Proceedings of the Korea Multimedia Society Conference
• /
• 1998.04a
• /
• pp.268-272
• /
• 1998

본 논문에서는 학습자가 직접 영상처리를 실행시켜 결과를 확인할 수 있는 인터넷상의 영상처리 교육시스템에 대하여 논하였다. 이 시스템은 클라이언트의 이미지와 학습자가 원하는 값을 입력하여 영상처리를 행함으로써 일방적인 정보전달 방식을 벗어나 상호 대화적인 학습이 가능하다. 또한 클라이언트가 자체적으로 영상처리를 행함으로써 서버와의 이미지정보 전송에 소요되는 시간을 상당량 단축할 수 있고, 이미지 처리 및 전송에 의한 서버의 부하를 줄일 수 있다. 향후 본 영상처리 교육시스템에 영상의 실시간 결합하면 더욱 효과적인 교육매체가 될 것이다.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.11 no.5
• /
• pp.1-9
• /
• 2011

Nowadays it is necessary to replace electrical wires with another intelligent connection method because the consumers, who have much experience with mobile smart devices, are expecting easier and smarter connectivity in their home electronics such as wireless linking. In this paper a bidirectional CEC control scheme is newly proposed to expand the controllability from one to two way in a millimeter band image transmission system because two degree of freedom controllability presents more intelligent convenience in HDMI interface systems. Experimental study shows the feasibility of the proposed system as an advanced image transmission solution in millimeter band including an intelligent 2 DOF CEC interface with the performance result of 3.0 Gbps transmission band for 1080p full-HD image steaming.

• Journal of Advanced Navigation Technology
• /
• v.8 no.2
• /
• pp.169-175
• /
• 2004

We analyzed about digital watermarking embedded transmission of still image in wireless multimedia communication environment. Also, we proposed improved watermark techniques. It effects that get in original image than method to use conventional image is less and shows robust watermark restoration ability from outside attack. Performance analysis achieved about still image and restoration of watermark information using OFDM/QPSK still image transmission system in wireless channel environment. Analysis result, VI watermark performance that influence in original image is very small. And it could know that show high restoration performance. Also, It showed superior copyright information extraction performance than image watermark in wireless channel environment of same transmission error condition.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.14 no.4
• /
• pp.1023-1031
• /
• 2010

With recent advances in hardware and wireless communication techniques, wireless multimedia sensor network which collects multimedia data through wireless sensor network has started to receive a lot of attentions from many researchers. Wireless multimedia sensor network requires a research of efficient compression and transmission to process the multimedia data which has large size, in the wireless sensor network that has very low network bandwidth. In this paper, we propose PIT protocol for the transmission based on the priority that classified by the DPCM compression. The PIT protocol sets different priority to the each subbands which are divided by the wavelet transform. The PIT protocol transmits the data with higher priority to guarantee the high image quality. The PIT protocol uses the characteristic of wavelet transform that the transformed image is very insensible to the data loss. In PIT protocol, each subbands of wavelet transformed image has fair weight in the compressed image to utilize the prioriy based transmission. The experiment results show that the PIT protocol improves the quality of image in spite of data loss.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2022.10a
• /
• pp.594-596
• /
• 2022

This paper relates to a system for pre-processing high-definition images acquired through a camera mounted on an unmanned aerial vehicle(UAV) and transmitting them to a server through a mobile communication network. In the case of the existing UAV system for image acquisition service, the acquired image was stored in the external storage device of the camera mounted on the UAV, and the image was checked by directly moving the storage device after the flight was completed. In the case of this method, there is a limitation in that it is impossible to check whether image acquisition or pre-processing is properly performed before directly checking image data through an external storage device. In addition, since the data is stored only in an external storage device, there is a disadvantage that data sharing is cumbersome. In this paper, to solve the above problems, we propose a system that can remotely check images in real time. Furthermore, we propose a system and method capable of performing pre-processing such as geo-tagging and transmission through a mobile communication network in addition to image acquisition through shooting in an UAV.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.18 no.6
• /
• pp.1117-1124
• /
• 2023

The security of information, including image content, is an essential part of today's communications technology and is critical to secure transmission. In this paper, a new ROI-based image encryption algorithm is proposed that can quickly encrypt images with a security level suitable for environments that require real-time data transmission for images containing sensitive information such as ID cards. The proposed algorithm is based on one dimensional 5-neighbor cellular automata, which can be implemented in hardware and performed hardware-friendly operations. Various experiments and analyses are performed to verify whether the proposed encryption algorithm is safe from various brute-force attacks.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.10d
• /
• pp.435-439
• /
• 2007

최근 저가형 이미지 센서 기술의 발전과 무선 센서 네트워크기술의 발전으로 인해 WMSN(Wireless Multimedia Sensor Networks) 기술이 활발히 연구되고 있다. WMSN은 기존의 무선 센서 네트워크 기술에 멀티미디어 컨텐츠를 센싱하고 전송 및 처리하는 기반기술을 포함한다. 멀티미디어 컨텐츠는 많은 데이터 가지므로 이를 처리하기 위해서는 많은 계산량과 데이터 전송량을 필요로 하게 된다. 저사양의 센서 노드에서 멀티미디어 컨텐츠를 수용하기 위해서는 에너지 소모를 고려한 압축 기법 및 효율적인 전송에 대한 연구가 필요하다. 본 논문에서는 무선 센서 네트워크에서 이미지를 효율적으로 압축하고 전송하기 위하여 웨이블릿의 Resolution Scalability 특성을 이용한 4가지 움직임 보상/예측 기법을 제안한다. 이를 지원하기 위해 시스템에서 사용하는 각 압축 기법들의 조합에 따른 압축 성능이 적절함을 알아보았다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.05a
• /
• pp.131-134
• /
• 2006

본 논문은 고화질 이미지를 MPEG-2 스트리밍 기반에 전송하는 방법을 제안한다. 본 논문에서 제안한 연구는 기존 연구에서는 다루지 않았던 고화질 이미지에 대한 부분을 다룰 것이며 제안된 환경은 DVB-ASI(Digital Video Broadcasting-Asynchronous Serial Interface) PCI 카드에서 입력받은 MPEG-2 스트리밍 데이터를 실시간으로 표준출력 장치에 디스플레이하며 송신 측과 수신 측에서 사용될 MPEG-2 스트리밍 헤더를 제안한다. 제안한 모듈 시험 결과 동영상 전송과 더불어 고화질 이미지 수신이 실시간으로 디스플레이 되었으며 시스템 점유율이 낮게 측정되었다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.40 no.8
• /
• pp.1477-1484
• /
• 2015

In this paper, a novel reversible data hiding by using Reed-Solomon (RS) code is proposed for efficient transmission in encryption image. To increase the recovery of data from encrypted image, RS codes are used to encode messages, and then the codewords can be embedded into encrypted image according to encryption key. After receiving encrypted image which embeds the codewords, the receiver firstly decryptes the encrypted image using the encryption key and get metric about codewords containing messages. According to recovery capability of RS codes, better estimation of message is done in data hiding system. Simulation results about two images and two RS codes show that the performances of the proposed schemes are better than ones of the reference scheme.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.10c
• /
• pp.328-330
• /
• 2001

본 논문에서는 가정용 PC상에서 별도의 장치 없이 구축할 수 있는 다중 이미지 전송 시스템을 구현한다. 구현한 시스템은 한 대의 PC에서 여러 대의 카메라를 사용하여 이미지를 캡춰하는 장점이 있다. 또한 PC에서도 많은 부하를 주지 않아 시스템의 안정성을 보장한다. 네트워크의 상황에 따라 적절하게 대처함으로써, 영상의 전송율을 일정하게 유지한다. 정지 영상을 이용한 시스템이지만, 동영상의 경우와 거의 차이가 없다. 본 논문의 보안시스템은 간단한 구조와 저렴한 비용으로 인해, 일반인도 쉽게 구축할 수 있다. 산업재해감시, 상가의 도난방지, 유치원의 아동관찰 등의 여러 용도로 쓰일 수 있다.