自动化学报2016，Vol.42Issue(9)：1380-1388,9.DOI:10.16383/j.aas.2016.c150630
二维旋转不变U变换及其应用
2D Rotation-invariant U Transform and Its Application
摘要
Abstract
U-system is a class of orthogonal piecewise-polynomial function system in L2[0, 1], and its generalized U-system in L2[0, 1]2 with tensor-product form is not rotation-invariant. In this paper, we present a novel 2D transform named rotation-invariant U transform (RIUT). The construction of RIUT combines U-system functions with harmonic functions so that the object0s rotation is transformed into its phase0s translation and the modulus keeps unchanged. Compared with the classical rotation-invariant moments, such as Zernike moment, RIUT has many special properties, suggesting an applying potential in image feature extraction. The experiment results for binary image retrieval show that RIUT method has a higher retrieval precision.关键词
旋转不变/U-系统/Zernike矩/二值图像检索Key words
Rotation-invariant/U-system/Zernike moment/binary image retrieval引用本文复制引用
陈伟..二维旋转不变U变换及其应用[J].自动化学报,2016,42(9):1380-1388,9.基金项目
国家自然科学基金(61602213,61170320,61402201),浙江大学CAD&CG 国家重点实验室开放课题(A1609),中央高校基本科研业务费专项资金(JUSRP11416),国家科技支撑计划(2015BAH54F00)资助Supported by National Natural Science Foundation of China (61602213,61170320,61402201), the Open Project Program of the State Key Laboratory of CAD&CG of Zhejiang University (A1609), Fundamental Research Funds for the Central Univer-sities of China (JUSRP11416), and National Science and Tech-nology Support Program (2015BAH54F00) （61602213,61170320,61402201）
