Edge detection technique having improved feature visibility
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United States of America Patent
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Oct 30, 2012
Grant Date -
Nov 24, 2011
app pub date -
May 18, 2010
filing date -
May 18, 2010
priority date (Note) -
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Abstract
A method for determining edge features of an image comprising filtering at least a portion of the image to attenuate high frequency signals of the image to an extent greater than low frequency signals of the image. Performing a one-dimensional search in a two different horizontal directions relative to a particular pixel of the image to determine horizontal direction local maximums. Calculating a horizontal gradient based upon the horizontal direction local maximums. Performing a one-dimensional search in a two vertical horizontal directions relative to a particular pixel of the image to determine vertical direction local maximums. Calculating a vertical gradient based upon the vertical direction local maximums. Calculating a gradient for the particular pixel based upon the horizontal gradient and the vertical gradient.
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Cited Art Landscape
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