A new approach to the design of hybrid finer directional wavelet filter bank for iris feature extraction and classification using k-out-of-n:A post-classifier

2013 ◽  
Vol 17 (3) ◽  
pp. 529-547 ◽  
Author(s):  
Amol D. Rahulkar ◽  
Laxman M. Waghmare ◽  
Raghunath S. Holambe
Keyword(s):  
Feature Extraction ◽  
Filter Bank ◽  
Wavelet Filter ◽  
New Approach ◽  
Wavelet Filter Bank ◽  
Directional Wavelet ◽  
Iris Feature Extraction

Signal-adapted wavelet filter bank design

1998 ◽  
Vol 34 (5) ◽  
pp. 434 ◽  
Author(s):  
Susu Yao
Keyword(s):  
Filter Bank ◽  
Wavelet Filter ◽  
Wavelet Filter Bank

Measurement of reverberation time of a passenger car utilizing the wavelet filter bank

2005 ◽  
Vol 219 (3) ◽  
pp. 329-336 ◽  
Author(s):  
Sang-Kwon Lee ◽  
Dong-June Yu
Keyword(s):  
Filter Bank ◽  
Bandpass Filter ◽  
Wavelet Filter ◽  
Reverberation Time ◽  
Passenger Cars ◽  
Passenger Car ◽  
Concert Hall ◽  
Low Level ◽  
Wavelet Filter Bank

A few researchers have tried to find the measurement of the reverberation time of a passenger car. However, this has proved to be extremely difficult because the reverberation time of a passenger car is too short to measure using the traditional bandpass filter. If the reverberation time is very short, the product of the reverberation time ( T) and the bandwidth ( B) of the traditional bandpass filter is very small. The low level of the product BT required for the measurement of the reverberation time using the traditional bandpass filter is 16. In order to overcome this problem, the wavelet filter bank has been developed. In the paper, this new wavelet filter is employed to measure the reverberation times of five different classes of passenger car. The low level of the product BT required for the measurement of reverberation time using the wavelet filter is 4. Therefore, it was possible to measure the reverberation times of five passenger cars successfully using the new wavelet filter bank. It is found that the reverberation times measured in most passenger cars are around 0.04. It is a very short reverberation time compared with those of general acoustic rooms like a concert hall.

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