L
Lowell L. Winger
Researcher at University of Waterloo
Publications - 11
Citations - 233
Lowell L. Winger is an academic researcher from University of Waterloo. The author has contributed to research in topics: Wavelet transform & Wavelet. The author has an hindex of 6, co-authored 11 publications receiving 227 citations. Previous affiliations of Lowell L. Winger include University of Toronto.
Papers
More filters
Proceedings ArticleDOI
Adaptive Wiener filtering of noisy images and image sequences
TL;DR: The proposed AWA wavelet Wiener filter is superior to the traditional waveletWiener filter by about 0.5 dB (PSNR) and an interesting method to effectively combine the denoising results from both wavelet and spatial domains is shown and discussed.
Journal ArticleDOI
Wavelet video denoising with regularized multiresolution motion estimation
TL;DR: This paper develops a new approach to video denoising, in which motion estimation/compensation, temporal filtering, and spatial smoothing are all undertaken in the wavelet domain, using a shift-invariant, overcomplete wavelet transform.
Journal ArticleDOI
Biorthogonal nearly coiflet wavelets for image compression
TL;DR: Simulation results confirm that the BNC 17/11 and BNC 16/8 wavelet bases are outstanding for compression of natural and medical images, and particularly for images with significant high-frequency detail, such as fingerprints.
Journal ArticleDOI
Low-complexity character extraction in low-contrast scene images
TL;DR: A low-complexity method for automatically extracting text of any size, font, and format from images acquired by a video camera that may be poorly focused and aimed, under conditions of inadequate and uneven illumination is presented.
Proceedings ArticleDOI
Character segmentation and thresholding in low-contrast scene images
TL;DR: This paper presents a fast thresholding scheme which combines a local variance measure with a logical stroke-width method and demonstrates the suitability of this method for use in an automated portable reader through a software implementation running on a laptop 486 computer in the prototype device.