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Conventional channel estimation schemes may require for the use of orthogonal pilot signals for each antenna in frequency-division duplex (FDD) wireless systems. It is a very challenging issue to get channel information with an affordable signaling overhead in massive multi-input multi-output (m-MIMO) FDD transmission environments. The signaling overhead for the channel estimation can be reduced by...
Recently, information has changed to the development of the information communication network and multimedia technology. The multimedia technology is used as application techniques including the storage, playback, compression, and so on. Also it has changed rapidly and extensively over the world. Therefore numerous search schemes such as the video retrieval, speech retrieval are required. Current...
Active Shape Model (ASM) is one of the most popular local texture model for detecting region of interest for face and locating facial features. This paper implements an efficient extraction method of facial feature points to utilize on iPhone. We extend the original ASM algorithm to improve the performance by four modifications: (1) we apply a face detection API included with iOS CoreImage framework...
MIPI(Mobile Industry Processor Interface) is the most competitive specifications in mobile industry. MIPI has established DSI(Display Serial Interface) for display and CSI-2(Camera Serial Interface 2) for camera. These two interfaces share same structure of packet and design hardware can be optimized by block sharing. We design common Rx circuit which can support both CSI-2 and DSI.
Wireless sensor networks (WSNs) operating in 2.4 GHz ISM band may seriously experience interference from coexisting radio systems such as IEEE 802.11x wireless local area networks. In this paper, we consider improvement of transmission performance of WSNs by means of packet size adaptation in the presence of co-channel interference. We first analyze the probability of transmission failure and data...
Extracting and understanding human emotion plays an important role in the interaction between humans and machine communication systems. The most expressive way to display human emotion is through facial expression analysis. In this paper, we propose a novel extraction and recognition method for facial expression and emotion on mobile cameras and formulate a classification model for facial emotions...
H.264/AVC, the international video coding standard developed by ITU-T VCEG and ISO/IEC MPEG, is known to be more efficient than other standards. Higher compression is provided with the parameter block mode of H.264/AVC, but due to its low compression efficiency, researchers tend to ignore the algorithm's intra-prediction coding capability. This study examined this overlooked aspect to determine its...
This work aims to find the medical information suited to the conditions, by analyzing the keywords provided from an user. With the given information, this model can be used to provide a flexible, compatible and effective searching paper for medical information. The proposed framework which helps medical institutions to search medical information in conjunction with analysis of user's request. The...
Since feature extraction not only plays a key role, but also have a great effect on image analysis and registration. In this paper, we evaluate a comparative performance of three point feature extraction algorithm such as SIFT, SURF and BRISK. The experimental results show that SURF exhibited a better significant results on extracting point features and matching time, compared to SIFT and BRISK. The...
In this paper, we design and develop an educational virtual system which can experience Goguryeo tomb murals in the virtual world. Goguryeo tomb murals are well known in the world, and they are registered as a UNESCO World Heritage site by the value Acknowledged worldwide. We design an user-friendly interface for Goguryeo tome murals by Flash, and make a modelling and rendering with 3D Max. In addition,...
Wireless sensor networks operating in 2.4 GHz ISM band are seriously affected by interference from coexisting radio systems such as IEEE 802.11× wireless local area networks. In this paper, we investigate the transmission performance of wireless sensor networks in the presence of co-channel interference. We first analyze the probability of transmission failure and data throughput associated with transmission...
Data gathering is one of the most popular applications in multi-hop wireless sensor networks. Since resources are limited, it is important to efficiently allocate the resource while providing desired performance. In this paper, we consider resource allocation in the uplink of multi-hop wireless networks with the use of data buffers of finite size in the presence of transmission error. We first analyze...
Data gathering is one of the most popular applications in multi-hop wireless sensor networks. Since resources are limited, it is important to efficiently allocate the resource Massive multi-input multi-output (m-MIMO) systems can provide a high degree of freedom in signal transmission, enabling to simultaneously serve a number of users with high transmissin capacity. Conventional zero-forcing beamforming...
Extracting and understanding of emotion is of high importance for the interaction among human and machine communication systems. The most expressive way to display the human's emotion is through facial expression analysis. This paper presents and implements an automatic extraction and recognition method of facial expression and emotion from still image. To evaluate the performance of the proposed...
In this paper, we consider the construction of a large scale wireless sensor network (WSN) by means of distributed network association with scalability. We design a network association mechanism that allows each router to have its own addressing space for unique addressing of its child nodes based on a pre-initialized addressing tree. We also design a device selection algorithm that can locate routers...
Detection of facial feature is fundamental for applications such as security, biometrics, 3D modeling, and facial expression recognition. Active Shape Model (ASM) is one of the most popular local texture models for face detection. This paper addresses issues related to face detection and implements an efficient extraction algorithm for facial landmarks suitable for use on mobile devices. The original...
Image retrieval is one of the most exciting and fastest growing research areas in the field of multimedia technology. In this paper, we present and implement an image descriptor that extracts the feature of image using combination of SURF (Speed Up Robust Feature) and DCD (Dominant Color Descriptor) scheme. To evaluate the performance of implemented algorithm, we assess the performance of simulation...
Recognizing and understanding of human emotion is a strongly reasonable method for the interaction among human and machine communication system. The most expressive way to extract and recognize the humane emotion is through facial expression analysis. This paper presents and implements an automatic extracting, understand and recognizing method of facial expression and emotion from input still images...
Active shape model (ASM) is one of the most popular local texture models for face detection. This paper addresses issues related to face detection and implements an efficient extraction of facial point features which is more suitable for using on mobile devices. The proposed and implemented algorithm in this paper is modified to enhance its performance (1) improving the initialization model using...
IEEE 802.15.4 networks operating in the 2.4 GHz ISM band are seriously affected by co-channel interference from coexisting radio systems such as IEEE 802.11x wireless local area networks. In this paper, we consider the beacon transmission in the presence of co-channel interference in the IEEE 802.15.4 beacon-enabled mode. For reliable transmission of the beacon frame, we propose repeated transmission...
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