The design of 2-D approximately linear phase filters using a direct approach
UNSPECIFIED. (1997) The design of 2-D approximately linear phase filters using a direct approach. SIGNAL PROCESSING, 57 (3). pp. 205-221. ISSN 0165-1684Full text not available from this repository.
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|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Journal or Publication Title:||SIGNAL PROCESSING|
|Publisher:||ELSEVIER SCIENCE BV|
|Number of Pages:||17|
|Page Range:||pp. 205-221|
Actions (login required)