MAP-based of Super-resolution Reconstruction Algorithm

引入一种基于关键点滤波(CrITICAl-POInT fIlTErS,CPf)的图像配准方法,并在最大后验概率(MAXIMuM A POSTErIOrI,MAP)框架下提出一种改进的集投影法(PrOJECTIOnS OnTO COnVEXSETS,MAP/POCS)混合算法。算法把POCS的残差约束集合加入到基于CPf图像配准的MAP正则算法中,在每次迭代重建中对重建图像的像素点进行约束,充分利用这三种算法的优点。实验结果表明,相比于传统的重建方法,该算法能够更有效地表达视频中的非平移运动,超分辨图像主观质量有明显改善。An image registration method based on the critical-point filters is introduced in this paper,and an improved MAP/POCS hybrid algorithm based on the framework of MAP has also been proposed,the POCS residual set of constraints is added to the reconstruction algorithm of MAP based on the critical-point filters registration method joined the adaptive regularization parameter so that it can take advantage of the three algorithms.After the test,the results show that compared with the traditional methods,the algorithm of this paper can express the non-translational motion more effectively and the quality of the super-resolution images has been improved obviously.国家自然科学基金项目(61102135); 中国博士后科学基金项目(2012M511433

Intra Prediction and Motion Estimation Algorithm Optimization of HEVC

为了进一步提高视频压缩效率，视频编码联合协作小组(JCT-VC)开发了新一代视频压缩标准——HEVC(HighEfficiencyVideoCoding)。作为最新的视频压缩标准，HEVC能够在提供相同质量的前提下，比H.264/AVC节省一半的码率。与以前的视频压缩标准相比，HEVC继承了混合编码的基本框架，同时还提供了更多高效的视频压缩工具，包括编码单元(CU)的递归式四叉树块划分结构、更多的帧内预测模式、非对称运动分割预测方式(AMP)等。这些新的编码工具在提高编码效率的同时，也极大地增加了编码器的复杂度。然而，在视频应用的诸多场合中，实时性的要求必不可少，如视频会议、视频转播、视频监控...To further improve the efficiency of video compression, Joint Collaborative Team on Video Coding (JCT-VC) has developed a new generation of video compression standard——HEVC (High Efficiency Video Coding). As the newest video compression standard, HEVC can achieve the same quality as H.264 with a 50 percents bit-rate saving. Compared with the previous standards, HEVC not only inherits the basic fra...学位：工学硕士院系专业：信息科学与技术学院_微电子学与固体电子学学号：2312012115290