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Local enhancement apparatus and method to generate high dynamic range images by blending brightness-preserved and brightness-adjusted blocks

  • US 9,307,162 B2
  • Filed: 05/21/2014
  • Issued: 04/05/2016
  • Est. Priority Date: 05/21/2014
  • Status: Active Grant
First Claim
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1. A local enhancement apparatus, comprising:

  • a block divider, for dividing an image into a plurality of blocks;

    a first enhancement unit, for performing a brightness-preserved enhancement on each of the plurality of blocks respectively to generate a plurality of brightness-preserved blocks;

    a second enhancement unit, for performing a brightness-adjusted enhancement on each of the plurality of blocks respectively to generate a plurality of brightness-adjusted blocks;

    a scene dynamic range estimator, for generating a dynamic range of the image according to characteristics of the image; and

    a blender, for blending the brightness-preserved blocks and the brightness-adjusted blocks to generate an enhanced image based on the dynamic range.

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