Image classification using concentration ratio
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United States of America Patent
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May 12, 2009
Grant Date -
Jul 28, 2005
app pub date -
Jan 22, 2004
filing date -
Jan 22, 2004
priority date (Note) -
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Abstract
Methods and systems of classifying an image by use of a concentration ratio that indicates the smoothness of the distribution of a population of elements in the image or portions thereof. Alternate embodiments may include determining the concentration ratio based on luminance components, grayscale components or a histogram, use of thresholds for determing the image classifications such as text, graphic or photographic, and use of a training process for creating the thresholds that includes analyzing a set of images having known classifications.
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