Adaptive Sharpening for Blocks of Pixels

A processing module configured to apply adaptive sharpening, for a block of input pixels for which upsampling is performed, to determine a block of output pixels, the processing module comprising:

• contrast determination logic configured to determine one or more indications of contrast for the block of input pixels;
• and
• output pixel determination logic configured to:
• receive a block of non-sharp upsampled pixels based on the block of input pixels, the block of non-sharp upsampled pixels being for representing a non-sharp version of the block of output pixels;
• receive a block of sharp upsampled pixels based on the block of input pixels, the block of sharp upsampled pixels being for representing a sharp version of the block of output pixels;
• and
• determine each output pixel of the block of output pixels by performing a respective weighted sum of:
• (i) a corresponding non-sharp upsampled pixel in the block of non-sharp upsampled pixels and (ii) a corresponding sharp upsampled pixel in the block of sharp upsampled pixels, wherein weights of the weighted sums are based on the determined one or more indications of contrast for the block of input pixels.

A non-transitory computer readable storage medium having stored thereon an integrated circuit definition dataset that, when processed in an integrated circuit manufacturing system, configures the integrated circuit manufacturing system to manufacture a processing module configured to apply adaptive sharpening, for a block of input pixels for which upsampling is performed, to determine a block of output pixels, the processing module comprising:

• contrast determination logic configured to determine one or more indications of contrast for the block of input pixels;
• and
• output pixel determination logic configured to:
• receive a block of non-sharp upsampled pixels based on the block of input pixels, the block of non-sharp upsampled pixels being for representing a non-sharp version of the block of output pixels;
• receive a block of sharp upsampled pixels based on the block of input pixels, the block of sharp upsampled pixels being for representing a sharp version of the block of output pixels;
• and
• determine each output pixel of the block of output pixels by performing a respective weighted sum of:
• (i) a corresponding non-sharp upsampled pixel in the block of non-sharp upsampled pixels and (ii) a corresponding sharp upsampled pixel in the block of sharp upsampled pixels, wherein weights of the weighted sums are based on the determined one or more indications of contrast for the block of input pixels.