TY - JOUR
T1 - A multiscale region detector
AU - Blostein, Dorothea
AU - Ahuja, Narendra
N1 - Funding Information:
under Grant AFOSR 86-MO9 fellowship from IBM. Science, Queen’s University.
Funding Information:
of the Air Force Office of Scientific Research Part of the work was supported by a graduate at Department of Computer and Information 3N6 Canada.
PY - 1989/1
Y1 - 1989/1
N2 - A multiscale region detector is derived from properties of a {down triangle, open}2G (Laplacian-of-Gaussian) scalespace. The detector finds all image regions that have small gray-level variation relative to a neighborhood of their size. These regions may be nested. Since the region detector is designed as a coarse estimator of region size and shape, it is better suited for texture element extraction than for general image segmentation. Uniform gray level regions are represented by a configuration of best-fitting disks of appropriate sizes and locations contained within the regions. The sizes and locations of best disks are estimated from the observed response of the {down triangle, open}2G operator across the image and across scales, using an analytic expression for the response of {down triangle, open}2G to disks. Both positive-contrast and negative-contrast regions are detected, and an estimate of region contrast is computed. Results are shown for a variety of natural textures.
AB - A multiscale region detector is derived from properties of a {down triangle, open}2G (Laplacian-of-Gaussian) scalespace. The detector finds all image regions that have small gray-level variation relative to a neighborhood of their size. These regions may be nested. Since the region detector is designed as a coarse estimator of region size and shape, it is better suited for texture element extraction than for general image segmentation. Uniform gray level regions are represented by a configuration of best-fitting disks of appropriate sizes and locations contained within the regions. The sizes and locations of best disks are estimated from the observed response of the {down triangle, open}2G operator across the image and across scales, using an analytic expression for the response of {down triangle, open}2G to disks. Both positive-contrast and negative-contrast regions are detected, and an estimate of region contrast is computed. Results are shown for a variety of natural textures.
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U2 - 10.1016/0734-189X(89)90068-6
DO - 10.1016/0734-189X(89)90068-6
M3 - Article
AN - SCOPUS:0024471402
SN - 0734-189X
VL - 45
SP - 22
EP - 41
JO - Computer Vision, Graphics and Image Processing
JF - Computer Vision, Graphics and Image Processing
IS - 1
ER -