Measuring isotropic local contrast: a circular mask based approach
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Date issued
2002
Journal Title
Journal ISSN
Volume Title
Publisher
UNION Agency
Abstract
Many image processing tasks depend on contrast measures, which can be used
to compare and improve contrast enhancement algorithms. Contrast
definitions are not always suitable for all situations. In particular an isotropic
local contrast measure, that produces a flat response to sinusoidal gratings, can
be difficult to obtain. In this paper we review the main existing contrast measures,
and propose a new approach, denoted as Circular Mask Metric (CMM). It is based
on band-pass filters and circular mask based local contrast computations.
This approach has been applied on different test images and with three contrast
enhancement methods, in order to show its potentialities for contrast
enhancement algorithm testing and improving.
Description
Subject(s)
izotropní lokální kontrast, kruhová maska, zpracování obrazu
Citation
WSCG '2002: Short Communication Papers: The 10-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2002, 4.-8. February 2002 Plzeň: Conference proceedings, p. 83-90.