In this paper, we present a novel method for processing double-sided historic handwritten documents using wavelets. The method is specially designed to remove the interfering strokes from the reverse side due to ink sipping through pages after long periods of storage. The proposed method works by first matching both sides of a document page such that the interfering strokes are mapped with the ...

A data-driven segmentation scheme is described that integrates edges and smooth regions. Edges are detected first and then used to guide the action of a dualresolution agglomeratine •parametric region detector. The scheme is applied to a variety of MR images. A comparison is made of segmentations produced by the scheme and by medical experts. The results are better than those obtained from the ...

Article history: Accepted 11 May 2011 Available online 11 June 2011

Gradual transitions represent a challenging problem for temporal segmentation of video. Here we present two new features for detecting these. Recently, Ngo et al. set out a method for edge detection in spatio-temporal images made out of the central column (or row, or diagonal) of a video. A wipe generates a diagonal edge in such an image. In this paper we make use of all available pixels to gen...

1Graduate Fellow, Department of Agricultural Engineering, University of Illinois at Urbana Champaign, IL, USA. 2Professor, Department of Agricultural Engineering, University of Illinois at Urbana Champaign, IL, USA. 3Assistant Professor, Department of Agricultural Engineering, University of Illinois at Urbana Champaign, IL, USA. 4Professor, Departamento de Engenharia Agrícola, Universidade Fede...

The absence of a BATSE line detection during the mission’s first six years has led to a statistical analysis of the occurrence of lines in the BATSE database; this statistical analysis will still be relevant if lines are detected. We review our methodology, and present new simulations of line detectability as a function of the line parameters. We also discuss the calculation of the number of “t...

We are suggesting a new approach to NMR image segmentation for multiple scleroses volume quantification. The choice of a segmentation technique is conditioned by whatis known in NMR acquisition artefacts. This research has been conducted in collaboration with the Lille Neuroradiology Laboratory leading to the implementation of a disease development index. We are about to explain in this article...

A fundamental question for edge detection is how faint an edge can be and still be detected. In this paper we offer a formalism to study this question and subsequently introduce a hierarchical edge detection algorithm designed to detect faint curved edges in noisy images. In our formalism we view edge detection as a search in a space of feasible curves, and derive expressions to characterize th...

We address the problem of constructing view aspects of 3D free-form objects for efficient matching during recognition. We introduce a novel view representation based on “shape spectrum” features, and propose a general and powerful technique for organizing multiple views of objects of complex shape and geometry into compact and homogeneous clusters. Our view grouping technique obviates the need ...