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公开(公告)号：KR100635883B1
公开(公告)日：2006-10-18
申请号：KR1020050045088
申请日：2005-05-27
Applicant: 성균관대학교산학협력단
IPC: G06T7/20
Abstract: A real-time object tracking apparatus is provided to track a moving object using a particle filter in real time without a delay time. A real-time object tracking apparatus includes a memory, a subtracter, a filter, and a particle filter. The memory sequentially stores images of a moving object. The subtracter subtracts a previous frame from a current frame stored in the memory to obtain a subtracted image. The filter removes noise of the subtracted image. The particle filter tracks the moving object using the subtracted image from which the noise is removed. The particle filter distributes particles in the subtracted image and sets the moving direction of the moving object through the distribution density of the particles according to a probability approach in response to a variation in the particle state and a weight given to the particles.
Abstract translation: 提供了一种实时对象跟踪设备，用于使用粒子滤波器实时跟踪运动对象而没有延迟时间。 实时对象跟踪装置包括存储器，减法器，滤波器和粒子滤波器。 存储器顺序存储移动物体的图像。 减法器从存储在存储器中的当前帧中减去前一帧，以获得减影图像。 滤镜可去除减影图像的噪点。 粒子滤波器使用消除了噪声的相减图像来跟踪运动对象。 粒子滤波器根据概率方法响应于粒子状态的变化和给予粒子的权重，在减去的图像中分配粒子并通过粒子的分布密度设置运动物体的运动方向。
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Patent Agency Ranking
公开(公告)号：KR100854005B1
公开(公告)日：2008-08-26
申请号：KR1020070046151
申请日：2007-05-11
Applicant: 성균관대학교산학협력단
CPC classification number: H04N5/2621 , G06K2017/0045 , G06T7/246
Abstract: A method and an apparatus for tracking multiple objects in real-time are provided to set priority to each particle filter, receive the subtraction image of the same priority to set a tracking target object in each particle filter, and receive a subtraction image, in which an area corresponding to the tracking target object which an upper particle filter is tracking is removed, and set a tracking target object, thereby reducing the increase of calculation caused by the extension of a tracking range as the number of tracking target objects increases and reducing the deterioration of tracking performance. An apparatus(100) for tracking multiple objects includes S particle filters(170a~170s), wherein S is an arbitrary natural number, a camera controller(120), an image storage memory(130), a priority distributor(150), and an image subtraction unit based on priority(140). The camera controller receives an original image from a camera(110) and outputs image information corresponding to the received original image. The image storage memory stores the image information. The priority distributor sets priority by using an object tracking result of particle filters. The image subtraction unit based on priority generates k priority subtracted image by using the image information of continuous frames read from the image storage memory and the area information of objects tracked by the (k-1) particle filters, wherein k is an arbitrary natural number in a range of 1 to S. The particle filters perform object tracking by using the priority subtracted images to output location information.
Abstract translation: 提供用于实时跟踪多个对象的方法和装置，以设置每个粒子滤波器的优先级，接收相同优先级的减影图像以在每个粒子滤波器中设置跟踪目标对象，并接收减法图像，其中 去除与上位粒子滤波器跟踪的跟踪目标对象相对应的区域，并且设置跟踪目标对象，由此随着跟踪目标对象的数量增加而减少由跟踪范围的扩展引起的计算的增加，并且减少 跟踪性能恶化。 用于跟踪多个物体的装置（100）包括S粒子滤波器（170a〜170s），其中S是任意自然数，相机控制器（120），图像存储存储器（130），优先分配器（150）和 基于优先级的图像减法单元（140）。 相机控制器从相机（110）接收原始图像，并输出与接收的原始图像相对应的图像信息。 图像存储存储器存储图像信息。 优先级分配器通过使用粒子滤波器的对象跟踪结果设置优先级。 基于优先级的图像减除单元通过使用从图像存储器读取的连续帧的图像信息和由（k-1）个粒子滤波器跟踪的对象的区域信息来生成k个优先相减图像，其中k是任意自然数 在1到S的范围内。粒子滤波器通过使用优先级减去的图像来执行对象跟踪以输出位置信息。
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公开(公告)号：KR100641354B1
公开(公告)日：2006-11-02
申请号：KR1020050038307
申请日：2005-05-09
Applicant: 성균관대학교산학협력단
IPC: H04N5/232
Abstract: A device and a method for detecting a focus of an image are provided to adjust a focus of camera by calculating a focal distance from an inputted image to a subject in real time without an additional focus control device or a burden of large calculation. A camera(110) takes a photograph of a subject by selecting an accurate focal distance to the subject among unaccurate focal distances while a position of a lens is changing to the subject. An image signal processing circuit(120) processes each image signal photographed from the camera according to the various focal distances to generate digital image frame signals of the subject and a focal distance signal according to each frame signal. A dynamic thresholding circuit(130) processes dynamic thresholding to image frames inputted from the image signal processing circuit to obtain images to which dynamic thresholding is applied. A pixel calculator(140) counts the number of pixels of images processed by dynamic thresholding. A motor driving unit(150) adjusts the position of the lens for controlling the focal distance. A focal distance controller(160) transmits a control signal for a motor to the motor driving unit by considering a pixel number signal of each image frame transmitted from the pixel calculator and a focal distance signal corresponding to each image frame transmitted from the image signal processing circuit.
Abstract translation: 提供了一种用于检测图像的焦点的装置和方法，用于通过实时计算从输入图像到对象的焦距而无需额外的焦点控制装置或大量计算的负担来调节照相机的焦点。 照相机（110）通过在镜头的位置正在向对象改变的同时在不精确的焦距中选择到对象的精确焦距而拍摄对象的照片。 图像信号处理电路（120）根据各种焦距处理从照相机拍摄的每个图像信号，以根据每个帧信号生成对象的数字图像帧信号和焦距信号。 动态阈值电路（130）对从图像信号处理电路输入的图像帧进行动态阈值处理，以获得应用了动态阈值处理的图像。 像素计算器（140）对动态阈值处理后的图像的像素数进行计数。 电动机驱动单元（150）调节用于控制焦距的透镜的位置。 焦距控制器（160）通过考虑从像素计算器发送的每个图像帧的像素数信号和与从图像信号处理发送的每个图像帧相对应的焦距信号，将用于电动机的控制信号发送到电动机驱动单元 电路。
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公开(公告)号：KR1020090084382A
公开(公告)日：2009-08-05
申请号：KR1020080010538
申请日：2008-02-01
Applicant: 삼성전자주식회사 , 성균관대학교산학협력단
CPC classification number: H04L27/2688 , H04L27/2659 , H04L27/2672 , H04L27/2675
Abstract: A correlation apparatus for frequency synchronization in a broadband wireless access communication system and a correlation method thereof are provided to improve the frequency synchronization performance by performing the frequency synchronization according to the highest correlation value. A frequency synchronizing unit(300) includes a delay and conjugate complex processor(350) and a correlator(340). The delay and conjugate complex processor delays as much as the predetermined interval after the FFT(Fast Fourier Transform) and generates a first signal by multiplying the signal after the FFT(Fast Fourier Transform) processing by the conjugate complex processed reception signal. The correlation unit receives a first signal, a second signal, and a third signal, and obtains the highest correlation value by producing the differential correlation value about the first signal and third signal. The second signal is generated by multiplying the conjugate complex of the reference signal by the delayed signal based on the reference signal. The third signal is produced by the signal delaying the second signal by the conjugate complex signal. A frequency controller(330) performs the frequency synchronization according to the highest correlation value.
Abstract translation: 提供宽带无线接入通信系统中的频率同步的相关装置及其相关方法，以通过根据最高相关值执行频率同步来提高频率同步性能。 频率同步单元（300）包括延迟和共轭复合处理器（350）和相关器（340）。 延迟和共轭复合处理器在FFT（快速傅立叶变换）之后的预定时间间隔延迟并且通过将FFT（快速傅里叶变换）处理之后的信号乘以共轭复数处理的接收信号而产生第一信号。 相关单元接收第一信号，第二信号和第三信号，并且通过产生关于第一信号和第三信号的差分相关值来获得最高相关值。 通过基于参考信号将参考信号的共轭复乘乘以延迟的信号来产生第二信号。 第三信号由通过共轭复信号延迟第二信号的信号产生。 频率控制器（330）根据最高的相关值进行频率同步。
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公开(公告)号：KR100849499B1
公开(公告)日：2008-07-31
申请号：KR1020070040025
申请日：2007-04-24
Applicant: 성균관대학교산학협력단
CPC classification number: H04N5/23296 , G02B5/20 , G06K9/00771 , G06T5/40
Abstract: A method and an apparatus for tracking an object by using an active camera are provided to obtain an image tracking a moving object and coordinate information of the object from an inputted image, and implement the same simply with hardware. A camera image controller(110) outputs image information corresponding to an image inputted from a camera(10). An image storage memory(120) stores the image information. A background compensator(130) analyzes one or more image information stored in the image storage memory and compensates a change in a background according to the motion of the camera. An image subtracting unit(140) performs subtracting between a plurality of image information compensated by the background compensator. A particle filter(150) tracks an object by using the subtracted image. A camera motion controller(160) controls motion of the camera based on the object tracking results of the particle filter.
Abstract translation: 提供了一种通过使用有源摄像机跟踪对象的方法和装置，以便从输入的图像中获得跟踪移动对象的图像和对象的坐标信息，并且简单地用硬件实现。 相机图像控制器（110）输出与从相机（10）输入的图像相对应的图像信息。 图像存储存储器（120）存储图像信息。 背景补偿器（130）分析存储在图像存储存储器中的一个或多个图像信息，并且根据相机的运动来补偿背景的变化。 图像减法单元（140）在由背景补偿器补偿的多个图像信息之间进行减法。 粒子滤波器（150）通过使用相减的图像跟踪对象。 相机运动控制器（160）基于粒子滤波器的对象跟踪结果控制相机的运动。
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公开(公告)号：KR101421406B1
公开(公告)日：2014-07-23
申请号：KR1020080010538
申请日：2008-02-01
Applicant: 삼성전자주식회사 , 성균관대학교산학협력단
CPC classification number: H04L27/2688 , H04L27/2659 , H04L27/2672 , H04L27/2675
Abstract: 본 발명은 주파수 동기를 위한 상관 방법에 관한 것으로, 광대역 무선접속 통신시스템에서 수신기의 주파수 동기 방법에 있어서 수신한 신호와 기준신호 사이에 가변 간격의 차동 상관을 수행하여 가장 상관도가 높은 값을 구하는 과정과 상기 가장 상관도가 높은 값에 따라 주파수 동기를 수행하는 과정을 포함하는 것으로 다중 경로 페이딩이 존재하는 직교 주파수 분할 다중 전송 시스템의 실제 수신환경에서 대략적 주파수 동기 성능을 크게 향상시킬 수 있는 이점이 있다.
OFDM, 주파수 동기, CAZAC, FFT
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