含噪图像中类线像素DWA和SCR恢复方法

分析了小波、脊波和曲线小波等方法用于含噪图像中类线像素恢复的不足.针对它们的缺点,提出了一种用于各向异性检测的方向算子集合的结构和统一规范.利用粗糙检测、淘汰和平均(DWA)方法,通过检测、淘汰和加权平均,实现了含噪图像中类线像素的恢复;利用收缩、选择和记载(SCR)方法,通过收缩、连接和记载操作,实现了含噪图像中类线像素的分割工作.仿真试验结果证明了提出算子的合理性和相关类线像素恢复及分割方法的准确性、有效性、局限性和一致性.     

Fast Approaches for Sub-pixel Precision Variable Block Size Motion Estimation

The new features of H.264 video coding standard make the motion estimation module much more time consuming than before.Especially,the motion search is required for each of the 4 modes for inter prediction.In order to reduce the computational complexity,we analyze the statistics of results of motion estimation,such as the continuity of best modes of blocks in successive frames and the chance to give up a sub-partition mode(smaller than 16×16)after integer-pixel motion estimation,from which we suggest to make...     

Novel Facial Features Segmentation Algorithm

An efficient algorithm for facial features extractions is proposed. The facial features we segment are the two eyes, nose and mouth. The algorithm is based on an improved Gabor wavelets edge detector, morphological approach to detect the face region and facial features regions, and an improved T-shape face mask to locate the extract location of facial features. The experimental results show that the proposed method is robust against facial expression, illumination, and can be also effective if the person wearing glasses, and so on.     

CMOS图像数据转换方法的研究与实现

介绍了1/2英寸300万像素CMOS数字图像传感器MT9T001.用FPGA完成了图像传感器的参数配置,给出了测试结果.提出了一种硬件上简明可行的Bayer数据到RGB数据的格式转换设计方案,用FPGA实现,最后应用到某多路图像采集系统中.     

对混合高斯随机数参数估计矩方法的改进

用一般矩方法进行混合高斯随机敬的参数估计需要计算多个非线性方程,改进后的矩方法把非线性方程化成了线性方程。本文提供了它的公式推演过程以及实验结果。     

新一代视频压缩标准H.264中数据的变换和量化

H.264协议是ITU-T和ISO标准化组织共同制定的新一代图像压缩标准。本文简要介绍了H.264协议的优点，详细分析了其中的变换与量化模块，包括变换的分类及原理，量化的过程。     

基于粒子滤波的无人机电视导引系统目标跟踪算法研究

为了实现直接攻击无人机的自动导引,设计了一种适用于小型攻击无人机的可见光电视导引系统,介绍了系统硬件构成。针对图像跟踪中的非线性滤波问题,采用了粒子滤波算法。在分析了粒子滤波算法中的退化现象后,设计了一种新的重采样算法。算法中样本的权值将直接决定这个样本是否应该被保留或者放弃,和这个样本以后的使用次数,权值大小的区分采用基于统计学分析的起始值。在粒子滤波的框架下,具体提出了一种基于粒子滤波的相关跟踪算法。算法仿真表明新的粒子滤波算法跟踪精度比以前的算法有较大提高。     

Blind Image Quality Assessment Based on Hybrid Fuzzy-Genetic Technique

A new method for no-reference image quality assessment based on hybrid fuzzy-genetic technique is proposed. Noise variance and edge sharpness level of the restored image are two basic metrics for assessing the performance of the restoration algorithm, then a fuzzy if-then inference system is developed to combine the two metrics to get a final quality score, and the parameters of the fuzzy membership function are trained with genetic algorithms. Experiments results show that the image quality score correlates well with mean opinion score and the proposed approach is robust and effective.     

面向3G的移动流媒体解决方案初探

对移动流媒体的概念和主流的Real Networks移动流媒体解决方案进行了分析,并结合3G标准和国内主要运营商的业务流程,提出了移动流媒体的可行性方案。     

矢量网络分析仪中小波变换模极大值法应用

文中利用小波变换的方法对矢量网络分析仪所测到的波形进行检测,并对检测信号进行随机噪声滤除,检测到所关心的信号,经过小波滤波理论分析和实验结果均表明,小波变换在滤波处理中是一种简单易行,有效的方法。