Ati Technologies Ulc

Isobel Lees

Keith Lee

Edward George Callway

Systems, apparatuses, and methods for detecting and mitigating scaling artifacts caused by high chromatic colors in adjacent pixels are disclosed. A blend factor calculation circuit determines if high chromatic colors are in close proximity to each other in a set of pixel data of an image or frame. The blend factor calculation circuit generates a blend factor value to suppress artifacts which are introduced when filtering the set of pixel data when the set of pixel data has high chromatic colors in close proximity. In one scenario, the blend factor calculation circuit calculates pixel component difference values of adjacent pixels and uses a value calculated based on the difference values as an input to a transfer function. The output of the transfer function is a blend factor value which determines how filtering is blended between a plurality of filters.

Detecting and mitigating artifacts related to high chromatic colors

Systems, apparatuses, and methods for implementing content adaptive processing via ringing estimation and suppression are disclosed. A ring estimator estimates the amount of ringing when a wide filter kernel is used for image processing. The amount of ringing can be specified as an under-shoot or an over-shoot. A blend factor calculation unit determines if the estimated amount of ringing is likely to be visually objectionable. If the ringing is likely to be visually objectionable, then the blend factor calculation unit generates a blend factor value to suppress the objectionable ringing. The blend factor value is generated for each set of source pixels based on this determination. The blend factor value is then applied to how the blending is mixed between narrow and wide filters for the corresponding set of source pixels. The preferred blending between the narrow and wide filters is changeable on a pixel-by-pixel basis during image processing.

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Toronto, Canada

Isobel Lees