- Deficiencies of the cryptography based on multiple-parameter fractional Fourier transformQiwen Ran
State Key Laboratory of Tunable Laser Technology Research, Institute of Optic Electronics, Harbin Institute of Technology, Harbin 150001, China
Opt Lett 34:1729-31. 2009..Lett.33, 581 (2008)]. A modified method is proposed to avoid all the deficiencies. Security and reliability are greatly improved without increasing the complexity of the encryption process...
- Wavelet transforming characteristic of a lensLiying Tan
National Key Laboratory of Tunable Technology, Harbin Institute of Technology, China
Appl Opt 41:6182-6. 2002..Subsequent analysis indicates that the lens has a wavelet-transforming characteristic and that the introduction of a Gaussian frequency-modulated complex-valued wavelet function conforms to the actual lens...