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Digital image processing and systems incorporating the same

  • US 8,577,169 B2
  • Filed: 02/01/2010
  • Issued: 11/05/2013
  • Est. Priority Date: 02/02/2009
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • circuitry for performing at least a portion of the calculations associated with an algorithm for mapping a high dynamic range digital image onto a display medium having a dynamic range lower than said high dynamic range digital image, said algorithm is configured to;

    receive a high dynamic range digital image and decompose said high dynamic range digital image into an intensity layer and a color layer,bilateral tone map said intensity layer to obtain a first contrast reduction factor,modulate said first contrast reduction factor with a rational expression to obtain a second contrast reduction factor, wherein said rational expression is automatically adjusted to a compression factor based upon data from substantially an entire frame, andalter said high dynamic range digital image using said second contrast reduction factor to obtain a second digital image having a dynamic range lower than said high dynamic range digital image.

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