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Methods and systems for enhancing display characteristics with high frequency contrast enhancement

  • US 8,922,594 B2
  • Filed: 06/15/2005
  • Issued: 12/30/2014
  • Est. Priority Date: 06/15/2005
  • Status: Expired due to Fees
First Claim
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1. A method for adjusting an image for increased brightness, said method comprising:

  • filtering said image to create a high-pass image and a low-pass image;

    selecting a maximum fidelity point (MFP);

    generating a tone scale adjustment model wherein said tone scale adjustment model effects a linear gain below said MFP and applies a round-off curve above said MFP;

    applying said tone scale adjustment model to said low-pass image to produce a tone scale adjusted low-pass image;

    generating a gain map function that is related to said tone scale adjustment model such that said gain map function effects no gain below said MFP and effects an increasing gain as image code values increase above said MFP;

    applying said gain map function to said high-pass image to produce a gain-enhanced, high-pass image; and

    combining said tone scale adjusted low-pass image with said gain-enhanced high-pass image to create an enhanced image.

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