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Image processing apparatus

  • US 7,719,619 B2
  • Filed: 03/06/2006
  • Issued: 05/18/2010
  • Est. Priority Date: 04/28/2005
  • Status: Active Grant
First Claim
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1. An image processing apparatus comprising:

  • a detection unit that analyzes a received video signal to detect a frequency of each of a plurality of luminance areas with a luminance at least equal to or lower than a predetermined luminance; and

    a black stretch processing unit that performs black stretch processing using the frequency of each of said plurality of luminance areas detected by said detection unit, wherein;

    said black stretch processing unit controls a level of a luminance signal in a black stretch range that varies according to the frequency of each of said plurality of detected luminance areas; and

    the black stretch range, calculated when a first luminance area with a luminance equal to or lower than the predetermined luminance has a first frequency and a second luminance area with a luminance higher than that of the first luminance area has a second frequency, is larger than the black stretch range calculated when the first luminance area has the first frequency and the second luminance area has a third frequency higher than the second frequency.

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