Magnification factor estimation device and method for same
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United States of America Patent
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May 16, 2017
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app pub date -
Apr 24, 2015
filing date -
Oct 31, 2012
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Abstract
A magnification factor is estimated for a magnified image. A generating means generates an image by removing a high frequency component from an input image. A first calculating means calculates a high frequency component greater than or equal to a prescribed frequency component in the spatial frequency component of the input image, as a spatial frequency component characteristic value. A second calculating means calculates the spatial frequency component of the input image, as a second spatial frequency component characteristic value. A determining means determines whether each pixel is block noise. A magnification factor estimating means removes pixels determined to be block noise by the determining means from summation target pixels and, estimates the magnification factor of the input image to be higher when the difference between the first spatial frequency component characteristic values and second spatial frequency component characteristic values of the remaining pixels is smaller.
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