共查询到20条相似文献,搜索用时 234 毫秒
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一种基于DSP的快速MUSIC测向方法研究与实现 总被引:2,自引:0,他引:2
讨论了MUSIC测向算法在DSP上快速实现的一种方法。利用多级维纳滤波的方法求解信号特征矢量和信号空间维数,有效地减少了算法的运算量;同时利用TI公司高速DSP芯片(TMS320C6713)的可多流水线并行运行优势,实现了一种基于9元均匀圆阵的快速MUSIC测向方法。 相似文献
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在复杂背景中的定位条码是图像式条码识别系统中的一个关键步骤,如何在复杂的背景中快速、自动地检测出条形码是研究的主要内容。首先介绍了条型码的编码结构。然后提出了一种基于游程编码思想的条码定位与识别方法。最后通过给出相关实验结果验证了算法的可行性和实用性。 相似文献
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为了使工业机器人能快速准确地对不同形状、不同高度的工件进行识别、定位、抓取和装配,采用PLC、智能相机、生产线和工业机器人搭建了基于机器视觉的工业机器人定位装配系统。利用智能相机多特征视觉定位方法,编写程序实现工业机器人对随机放置的不同形状、不同高度的工件进行识别、定位和抓取,并通过设计二次定位机构,实现对工件的精确装配。实验测试结果表明,该系统定位准确可靠,精度满足社会生产需要,具有重要的现实意义。 相似文献
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针对实际条码识别系统中全场景监控和传统图像拼接算法速度慢的问题,提出了一种基于离线标定的快速全景视频拼接算法。在实际应用中多台相机位置固定,采用离线标定计算出图像拼接的单应性矩阵,在实时拼接中直接加载该矩阵进行计算,从而省去了大量的特征提取和配准时间。为了提高图像特征的配准精度,设计了一种改进的SIFT(Scale-Invariant Feature Transform)特征匹配算法。实验结果表明,该算法对比传统算法显著减少了错误特征匹配的影响,提高了图像拼接速度,具有更好的特征匹配效果。 相似文献
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A high-speed algorithm for calculating the square root is proposed. This algorithm, which can be regarded as calculation of the step response of a kind of nonlinear IIR filter, requires no divisions. Therefore, it is suitable for a VLSI digital signal processor (DSP) which has a high-speed hardware multiplier but does not usually have a high-speed hardware divider. The convergence properties of the algorithm are analyzed and used to develop a practical implementation of the procedure. It is implemented on the commercially available DSP (TM320C25) and is compared with the Newton-Raphson method. The proposed algorithm has two advantages over the Newton-Raphson method: higher execution speed and smaller calculation error 相似文献
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OFDM系统的研究及软件无线电实现 总被引:1,自引:0,他引:1
OFDM系统有直接实现和DSP实现2种方法。在分析OFDM系统时发现,采用DFT方法处理OFDM不仅大大简化调制解调器的设计,而且可以在DSP芯片和硬件结构中快速实现FFT计算,因此在考虑OFDM系统的调制解调原理、系统采取的抗干扰能力的举措、利用DSP技术和FFT快速算法的基础上,设计了一个以DSP和FPGA为核心的实现OFDM发送、接收系统的方案。 相似文献
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为了满足航空大面阵CCD相机视频数据高速、实时传输和存储的要求,本文设计了一种基于H.264视频编码算法的压缩系统。整个压缩系统分为CCD前端、视频压缩、视频显示、视频压缩码流存储以及压缩分析单元,视频压缩单元采用高性能视频专用DSP处理器TMS320DM642,软件平台采用在CCS3.1上使用C语言实现H.264压缩算法。为了使压缩算法高效快速的运行,本文使用了DSP/BIOS资源来管理软硬件工作。 为了高速交互数据,采用了EDMA高速搬运数据策略,进而保证了数据实时传输的需要。实验结果表明,本文提出的压缩系统可以稳定正常的工作,具有良好压缩性能,在压缩比40:1~10:1范围内,平均信噪比高于35dB,满足了航空CCD相机应用的需求。 相似文献
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This paper addresses the localization and navigation problem in the movement of service robots by using invisible two dimensional barcodes on the floor. Compared with other methods using natural or artificial landmarks, the proposed localization method has great advantages in cost and appearance since the location of the robot is perfectly known using the barcode information after mapping is finished. We also propose a navigation algorithm which uses a topological structure. For the topological information, we define nodes and edges which are suitable for indoor navigation, especially for large area having multiple rooms, many walls, and many static obstacles. The proposed algorithm also has the advantage that errors which occur in each node are mutually independent and can be compensated exactly after some navigation using barcodes. Simulation and experimental results were performed to verify the algorithm in the barcode environment, showing excellent performance results. After mapping, it is also possible to solve the kidnapped robot problem and to generate paths using topological information. 相似文献
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《Journal of Visual Communication and Image Representation》2014,25(5):943-950
With the rapid development of portable digital video equipment, such as camcorders, digital cameras and smart phones, video stabilization techniques for camera de-shaking are strongly required. The cutting-edge video stabilization techniques provide outstanding visual quality by utilizing 3D motion, while early video stabilization is based on 2D motion only. Recently, a content-preserving warping algorithm has been acknowledged as state-of-the-art thanks to its superior stabilization performance. However, the huge computational cost of this technique is a serious burden in spite of its excellent performance. Thus, we propose a fast video stabilization algorithm that provides significantly reduced computational complexity over the state-of-the-art with the same stabilization performance. First, we estimate the 3D information of the feature points in each input frame and define the region of interest (ROI) based on the estimated 3D information. Next, if the number of feature points in the ROI is sufficient, we apply the proposed ROI-based pre-warping and content-preserving warping sequentially to the input frame. Otherwise, conventional full-frame warping is applied. From intensive simulation results, we find that the proposed algorithm reduces computational complexity to 14% of that of the state-of-the-art method, while keeping almost equivalent stabilization performance. 相似文献