Novel robust optimal filter design method and new transition band analysis

2013 ◽  
Author(s):  
Hsiao-Chun Wu
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Optimal Filter ◽  
Transition Band ◽  
Filter Design Method

A Nearly Optimal Fractional Delay Filter Design Using an Asymmetric Window

2011 ◽  
Vol 57 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Maciej Sac ◽  
Marek Blok
Keyword(s):  
Real Time ◽  
Filter Design ◽  
Design Method ◽  
Optimal Filter ◽  
Optimal Filters ◽  
Window Method ◽  
Fractional Delay ◽  
Fractional Delay Filter ◽  
Filter Design Method ◽  
Varying Delay

A Nearly Optimal Fractional Delay Filter Design Using an Asymmetric WindowIn this paper a numerically efficient filter design method suitable for variable fractional delay (VFD) filter implementation is investigated. We propose to use a well known window method with an asymmetric window extracted from optimal filter designed beforehand. As we will demonstrate, such an approach, if additional gain correction is applied, allows for nearly optimal VFD filter design. Thus, the proposed approach combines window method simplicity with performance comparable to that of optimal filters. Efficiency of the presented technique makes it suitable for designing filters with varying delay in real time.

Defect Detection in Patterned Fabrics Using Wavelet Filter

2013 ◽  
Vol 756-759 ◽  
pp. 3831-3834 ◽  
Author(s):  
Yu Long Ying ◽  
Dan Er Chen
Keyword(s):  
Defect Detection ◽  
Filter Design ◽  
Design Method ◽  
Texture Features ◽  
Optimal Filter ◽  
Test Results ◽  
Textile Fabrics ◽  
Supervised Segmentation ◽  
Different Types ◽  
Filter Design Method

This paper investigates the problem of automated defect detection for textile fabrics and proposes a new optimal filter design method for solving this problem. Wavelet is used to extract the texture features of textile fabrics. In view of this optimal filter, a news semi-supervised segmentation algorithm is then proposed. The performance of the scheme is evaluated by using a variety of homogeneous textile images with different types of common defects. The test results exhibit accurate defect detection with low false alarm, thus confirming the robustness and effectiveness of the proposed scheme.

Digital all-pass filter design method based on complex cepstrum

2003 ◽  
Vol 39 (8) ◽  
pp. 695 ◽  
Author(s):  
G. Jovanovic-Dolecek ◽  
J. Diaz-Carmona
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Pass Filter ◽  
Complex Cepstrum ◽  
Filter Design Method

Median Morphological Filter Design Based on the PSO Algorithm

2011 ◽  
Vol 128-129 ◽  
pp. 181-184
Author(s):  
You Lian Zhu ◽  
Cheng Huang
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Signal To Noise Ratio ◽  
Pso Algorithm ◽  
Morphological Operations ◽  
Morphological Filter ◽  
Signal To Noise ◽  
Noise Ratio ◽  
The Cost ◽  
Filter Design Method

Design of morphological filter greatly depends on morphological operations and structuring elements selection. A filter design method used median closing morphological operation is proposed to enhance the image denoising ability and the PSO algorithm is introduced for structural elements selecting. The method takes the peak value signal-to-noise ratio (PSNR) as the cost function and may adaptively build unit structuring elements with zero square matrix. Experimental results show the proposed method can effectively remove impulse noise from a noisy image, especially from a low signal-to-noise ratio (SNR) image; the noise reduction performance has obvious advantages than the other.

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