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.     

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...     

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。     

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。     

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。     

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.     

基于直方图熵和遗传算法的图像分割法

图像分割是计算机视觉研究中一个老而难解决的问题。本文提出了一种基于灰度图像的直方图的熵和遗传算法进行图分割的方法,以灰度图像的直方图熵作为评价标准,把图像分割问题定义为一个优化问题,利用遗传算法的寻优高效性,搜索到能使分割到最优的分割参数－－图像分割阈值。     

Novel algorithm for pose-invariant face recognition

By combining the AdaBoost modular locality preserving projection(AMLPP) algorithm and the locally linear regression(LLR) algorithm,a novel pose-invariant algorithm is proposed to realize high-accuracy face recognition under different poses.In the training stage of this algorithm,the AMLPP is employed to select the crucial frontal blocks and construct effective strong classifier.According to the selected frontal blocks and the corresponding non-frontal blocks,LLR is then applied to learn the linear mappings which will be used to convert the non-frontal blocks to visual frontal blocks.During the testing of the learned linear mappings,when a non-frontal face image is inputted,the non-frontal blocks corresponding to the selected frontal blocks are extracted and converted to the visual frontal blocks.The generated virtual frontal blocks are finally fed into the strong classifier constructed by AMLPP to realize accurate and efficient face recognition.Our algorithm is experimentally compared with other pose-invariant face recognition algorithms based on the Bosphorus database.The results show a significant improvement with our proposed algorithm.     

多传感器图像采集处理系统的设计与实现

为了完成一个多传感器图像采集处理系统的设计、软硬件实现,采用参数同步配置方法提高多CMOS图像传感器同步曝光精度.采用基于Bayer颜色滤波阵列图像的残差集近无损压缩方法提高图像数据传输速度.系统三传感器曝光达到了微秒级同步精度.约为课题任务要求的1/29.在保证重建图像质量精度的前提下,数据传输速度提高了约4.4倍.给出了系统部分最终测试结果.