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Difference of Gaussians
- Created 2012-02-27
difference of Gaussians
enhancement algorithm that involves the subtraction of one blurred version of an original image from another, less blurred version of the original. In the simple case of
, the blurred images are obtained by
with Gaussian kernels having differing standard deviations. Blurring an image using a
information. Subtracting one image from the other preserves spatial information that lies between the range of frequencies that are preserved in the two blurred images. Thus, the difference of Gaussians is a
that discards all but a handful of spatial frequencies that are present in the original grayscale image.
from Wikipedia (last updated: 20 June), licensed under
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"Molecular Expressions Microscopy Primer: Digital Image Processing - Difference of Gaussians Edge Enhancement Algorithm", ''Olympus America Inc., and Florida State University''
Scale-invariant feature transform
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