circular shift meaning in Chinese

环式移位
环形移位
循环移位

Analysis indicates that circular shift block selected mapping algorithm may have well foreground of application with the number of bits required to represent side information much less with little loss of performance
分析表明，循环移位分组选择映射算法可以取得性能和系统代价这二者的折衷，具有较好的实际使用价值。
At first we improve the methods of iris image preprocessing , including an efficient arithmetic of evaluation iris images , an improving method of locating iris , calibrating iris image by the translation of coordinate and the circular shift of code , a eatimate of the background illumination by bicubic spline , and the image enhancement by the dual tree complex wavelet transform . next we designed the recognition arithmetic based on the location of the local maxima of the wavelet transform modulus . in the thesis lots of simulation are performed by means of matlab and visual c + +
首先改进了虹膜预处理方法,实现了一种快速高效的虹膜质量评价算法;设计了一种改进的两步虹膜定位算法,准确的定位了虹膜的内外边界;利用坐标转换和编码的循环移位实现了对虹膜图像的配准;利用双三次样条函数拟合虹膜图像背景,去除了非均匀光照对虹膜识别的影响;使用二分树复数小波方法增强了虹膜图像的对比度;在识别算法方面,本文设计了一种“基于小波模极值点位置的虹膜识别算法” 。