Projection filter, Wiener filter, and Karhunen-Loève subspaces in digital image restoration

Digital image restoration by Wiener filter in 2D case

Modern digital technology has made it possible to manipulate multi-dimensional signals with systems that range from simple digital circuits to advanced parallel computers. The goal of this manipulation can be divided into three categories: • Image Processing image in! image out. • Image Analysis image in ! measurements out. • Image Understanding image in! high-level description out. Further, we...

Multichannel noise reduction wiener filter in the Karhunen-Loève expansion domain

This paper explores the noise reduction problem in the KarhunenLoève expansion (KLE) domain from a multichannel perspective. Based on formulations proposed for the design of optimal singlechannel noise reduction in the KLE domain, we formulate the multichannel noise reduction in the KLE domain. Two different performance measures are presented: the noise reduction and speech distortion. The opti...

Distributed Karhunen-Loève Transform with nested subspaces

A network in which sensors observe a common Gaussian source is analyzed. Using a fixed linear transform, each sensor compresses its high-dimensional observation into a low-dimensional representation. The latter is provided to a central decoder that reconstructs the source according to a mean squared error (MSE) distortion metric. The Distributed Karhunen-Loève Transform (d-KLT) has been shown t...

Fuzzy Clustering of Image Trademark Database and Preprocessing using Adaptive filter and Karhunen-LOèVE Transform

In this paper an efficient preprocessing module has been described which focuses on building a trademark database that can be used for developing a trademark retrieval system. The preprocessing module focuses on noise removal from the trademark images using an adaptive filtering technique using Wiener filters, followed by Karhunen-Loève Transform that makes the trademark search process rotation...

ECE533 Digital Image Processing Course Project: Image Restoration using Iterative Wiener Filter