• Publications
  • Influence
A flexible design of nonuniformly oversampled multirate filter banks
By introducing weighted L/sup p/ norms as a performance function in an iterative nonlinear optimization design, nonuniformly oversampled multirate filter banks with arbitrary frequency resolution may be designed and provides considerable improvements in the quality of frequency responses for analysis and synthesis filters. Expand
Translation, rotation and scale invariant texture characterization method for retrieval
  • Z. Liu, S. Wada
  • Mathematics
  • Proceedings of the Fourth IEEE International…
  • 18 December 2004
Retrieval and classification of distorted texture images is a challenging and important problem in real world image analysis and understanding. This paper proposes a new texture characterizationExpand
Time-frequency analysis of driving sound and application to electric machinery diagnosis
  • Y. Terao, S. Wada
  • Computer Science
  • Proceedings 7th International Conference on…
  • 2004
A driving sound model by time-frequency analysis and apply to electric machinery diagnosis and the actual pump is diagnosed to show the effectiveness of the method. Expand
Design of nonuniform division multirate FIR filter banks
In this paper, a new design for nonuniform division multirate filter banks is presented. Signals are divided into a number of nonuniform frequency bands using analysis filters having individualExpand
Robust feature extraction technique for texture image retrieval
  • Zhuo Liu, S. Wada
  • Mathematics, Computer Science
  • IEEE International Conference on Image Processing
  • 14 November 2005
A novel texture feature extraction technique for texture image retrieval that is robust to geometric distortions as well as noise effect and valuable wavelet packet statistics is used to measure similarity between individual images. Expand
HVS based wavelet watermarking with bit data embedded in color images
In this paper, a wavelet-based perceptual watermarking considering human visual system (HVS) that is proposed by Barni et al. (see IEEE Trans. Image Processing., vol.10, no.5, p.783-791, 2001) forExpand
Wavelet-based perceptual watermarking with bit data embedded in still color images
An image water marking method is proposed that can embed bit patterns with an arbitrary length by extending the wavelet-based watermarking method based on the human visual system (HVS) proposed by Barni. Expand
Effective calculation of finite frame operator for the multiple short-time Fourier transform
Effective methods to calculate finite dual frame for the short-time Fourier expansion (STFE) in l/sup 2/(Z) are proposed when arbitrary finite frame is given. Based on a relationship between theExpand
Melody and bass line estimation method using audio feature database
  • Y. Uchida, S. Wada
  • Computer Science
  • IEEE International Conference on Signal…
  • 1 September 2011
Simulation results are given to show the effectiveness of the method based on sound feature verification using musical sound feature database such as tone (timbre) and pitch database using mixture sound signal for automatic music transcription. Expand