Filtering with side-information using contextually-designed filters

A device, comprising:

• a processor, the processor configured to:
• obtain, for a pixel of a degraded frame, magnitude features based on a first window centered at the pixel, wherein a cardinality N of the magnitude features is at least 1;
• use the magnitude features to obtain a pixel-adaptive filter, wherein to use the magnitude features to obtain the pixel-adaptive pixel comprises to:
• obtain, for the pixel, N classification features, wherein each of the N classification features corresponds to an average of respective magnitude features of pixels of a second window that is centered at the pixel;
• and
• apply the pixel-adaptive filter to the pixel to obtain a pixel of a restored frame.

A non-transitory computer-readable storage medium, comprising executable instructions that, when executed by a processor, cause performance of operations for obtaining a restored frame from a degraded frame, comprising:

• obtaining, for a pixel of the degraded flame, magnitude features based on a first window centered at the pixel, wherein a cardinality N of the magnitude features is at least 1:
• using the magnitude features to obtain a pixel-adaptive filter, wherein using the magnitude features to obtain the pixel-adaptive pixel comprises:
• obtaining, for the pixel, N classification features, wherein each of the N classification features corresponds to an average of respective magnitude features of pixels of a second window that is centered at the pixel;
• and
• applying the pixel-adaptive filter to the pixel to obtain a pixel of the restored frame.