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The design of 2-D approximately linear phase filters using a direct approach
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UNSPECIFIED (1997) The design of 2-D approximately linear phase filters using a direct approach. SIGNAL PROCESSING, 57 (3). pp. 205-221. ISSN 0165-1684.
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Abstract
A novel approach to the design of approximately linear phase recursive digital filters was recently described. The technique exploited a property of allpass transfer functions which allowed the creation of a set of linear simultaneous equations in the filter coefficients which could then be solved in the least-squares sense. This paper extends the design method to 2-D and multi-D filters. These filters find application in many areas including image processing, image coding, filter banks and seismic data processing. Several problems arise which are not present in the 1-D design and the paper looks at ways to overcome them. In addition, there is discussion on the stability issue. Several examples including circularly, elliptically and diamond symmetric lowpass filters and a fan filter are presented. Comparison is made between the proposed technique and those of Gu and Swamy (1994) and Toyoshima et al. (1990). (C) 1997 Elsevier Science B.V.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
Journal or Publication Title: | SIGNAL PROCESSING | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0165-1684 | ||||
Official Date: | March 1997 | ||||
Dates: |
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Volume: | 57 | ||||
Number: | 3 | ||||
Number of Pages: | 17 | ||||
Page Range: | pp. 205-221 | ||||
Publication Status: | Published |
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