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Image upsampling with training images

  • US 8,233,734 B2
  • Filed: 09/22/2008
  • Issued: 07/31/2012
  • Est. Priority Date: 09/22/2008
  • Status: Active Grant
First Claim
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1. A method of upsampling an image, the method comprising:

  • constructing a coarse high-frequency component from a low-resolution, full-frequency image, the coarse high-frequency component comprising a plurality of inferred first-tier high-frequency patches obtained from an existing knowledge base;

    constructing a high-compatibility component from the low-resolution, full-frequency image without using the existing knowledge base;

    combining the high-compatibility component with the coarse high-frequency component to yield an enhanced high-frequency component, the enhanced high-frequency component comprising a plurality of enhanced high-frequency patches;

    constructing an improved high-frequency component from the enhanced high-frequency component, the improved high-frequency component comprising a plurality of inferred third-tier high-frequency patches obtained from the existing knowledge base; and

    blending the improved high-frequency component with a high-resolution, low-frequency image, interpolated from the low-resolution, full-frequency image, to yield a high-resolution image.

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