M
Masaaki Ikehara
Researcher at Keio University
Publications - 321
Citations - 1390
Masaaki Ikehara is an academic researcher from Keio University. The author has contributed to research in topics: Filter bank & Filter design. The author has an hindex of 16, co-authored 304 publications receiving 1264 citations. Previous affiliations of Masaaki Ikehara include University of California & Nagasaki University.
Papers
More filters
Journal ArticleDOI
Linear phase paraunitary filter bank with filters of different lengths and its application in image compression
TL;DR: The theory, structure, design, and implementation of a new class of linear-phase paraunitary filter banks (LPPUFBs) are investigated, which takes advantage of its long, overlapping basis functions to represent smooth signals in order to reduce blocking artifacts and reserves short basis functions for high-frequency signal components like edges and texture, thereby limiting ringing artifacts.
Journal ArticleDOI
Integer DCT Based on Direct-Lifting of DCT-IDCT for Lossless-to-Lossy Image Coding
Taizo Suzuki,Masaaki Ikehara +1 more
TL;DR: This paper proposes a hardware-friendly IntDCT that can be applied to both lossless and lossy coding, and is validated by its application to lossless-to-lossy image coding.
Proceedings ArticleDOI
HMM-based surface reconstruction from single images
TL;DR: A novel method of the surface reconstruction from a single monocular image is proposed, based on the knowledge of objects, which is acquired by learning from a number of samples, making use of the hidden Markov model (HMM) framework.
Journal ArticleDOI
Multiresolution Image Representation Using Combined 2-D and 1-D Directional Filter Banks
TL;DR: In applications on nonlinear approximation, image coding, and denoising, the proposed filter banks show visual quality improvements and have higher PSNR than the conventional separable WT or the contourlet.
Journal ArticleDOI
Design of complex all-pass networks using Remez algorithm
TL;DR: In this article, a new method for designing complex all-pass digital filters is introduced, where phase error is regarded as the amplitude of complex error between the designed and the desired all pass function.