J
Joan S. Weszka
Researcher at University of Maryland, College Park
Publications - 12
Citations - 2760
Joan S. Weszka is an academic researcher from University of Maryland, College Park. The author has contributed to research in topics: Image segmentation & Image processing. The author has an hindex of 9, co-authored 12 publications receiving 2686 citations.
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Journal ArticleDOI
A Comparative Study of Texture Measures for Terrain Classification
TL;DR: In this paper, three standard approaches to automatic texture classification make use of features based on the Fourier power spectrum, on second-order gray level statistics, and on first-order statistics of gray level differences, respectively.
Journal ArticleDOI
A survey of threshold selection techniques
TL;DR: This paper presents a review of a variety of techniques for automatic threshold selection, including global, local, and dynamic methods, which have been proposed for automatic thresholds selection in image segmentation.
Journal ArticleDOI
Threshold Evaluation Techniques
Joan S. Weszka,Azriel Rosenfeld +1 more
TL;DR: The problem of threshold evaluation is addressed, and two methods are proposed for measuring the "goodness" of a thresholded image, one based on a busyness criterion and the otherbased on a discrepancy or error criterion.
Journal ArticleDOI
A Threshold Selection Technique
TL;DR: A method of handling cases in which the peaks are very unequal in size and the valley is broad is described, in which points that lie on or near the edges of objects are determined.
ReportDOI
Histogram modification for threshold selection
Joan S. Weszka,Azriel Rosenfeld +1 more
TL;DR: A standard approach to threshold selection for image segmentation is based on locating valleys in the image's gray level histogram, but several methods have been proposed that produce a transformed histogram in which the valley is deeper, or is converted into a peak, and is thus easier to detect.