The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Multiresolution techniques : Laplacian pyramid coding and its comparison with subband coding
Author:	Chang, Danmei
View Online:	njit-etd1991-085 ([vii], [63] pages ~ 6.5 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Lu, Chung H. (Committee chair) Hou, Edwin (Committee member) Shi, Yun Q. (Committee member)
Date:	1991-01
Keywords:	Imaging processing Coding theory Data compression (Computer science)
Availability:	Unrestricted
Abstract:	The multiresolution pyramid and related structures have been developed as intermediate representations between the purely frequency domain and purely spatial domain. In this thesis. we discuss two important pyramid structures which are often used in multiresolution representation: Laplacian pyramid and subband coding. Laplacian pyramid. a typical pyramid structure, is studied in detail. By means of software implementation. we obtain a comprehensive understanding of its features and applications in image representation and data compression. Several modifications of pyramid structure are used to compress the data dynamic range, reduce the computational complexity and improve performance. Performance of the conventional Laplacian pyramid and the modified pyramid structures are studied and compared.