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IMAGE PROCESSING APPARATUS AND METHOD FOR CONTROLLING THE SAME

  • US 20110013848A1
  • Filed: 06/30/2010
  • Published: 01/20/2011
  • Est. Priority Date: 07/15/2009
  • Status: Active Grant
First Claim
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1. An image processing apparatus that generates image data having a high dynamic range by combining a plurality of sets of image data having different exposure amounts, comprising:

  • an input unit configured to input a plurality of sets of M-bit image data that are to be combined;

    a determining unit configured to determine reference image data serving as an exposure reference from among the plurality of sets of input M-bit image data;

    a composition unit configured to combine the plurality of sets of M-bit image data, and generate one set of N-bit composite image data (N>

    M);

    a characteristic parameter setting unit configured to set a characteristic parameter of tone compression on the N-bit composite image data such that a predetermined reference luminance in the reference image data does not change; and

    a generating unit configured to generate M-bit composite image data by compressing a luminance tone of an image component having a frequency lower than a predetermined frequency contained in the N-bit composite image data based on the set characteristic parameter.

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