Method for converting input image data into output image data, image conversion unit for converting input image data into output image data, image processing apparatus, display device
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United States of America Patent
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May 12, 2015
Grant Date -
Dec 26, 2013
app pub date -
Jan 2, 2012
filing date -
Jan 7, 2011
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Abstract
In a method and device for improving image rendition by contrast and/or sharpness enhancement the sharpness enhancement is made dependent on the local average luminance value. A mix is made of spatially enhanced image signals is used, wherein for various signal differing spatial frequencies are boosted. The mixing factors for mixing of the boosted signals are dependent on a local average luminance value such that the distribution over frequency bands shifts to higher frequencies and sharper enhancement as the luminance value increases.
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