Scaler de-ringing in image processing circuitry
AssigneeApple Inc.
InventorsMahesh B. Chappalli, Vincent Z. Young
Life of this patent
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Abstract
Methods and systems include receiving, at de-ringing circuitry of a display pipeline of an electronic device, scaled image content based on image data. The de-ringing circuitry also receives a fallback scaler output. The de-ringing circuitry determines whether the image data has a change frequency greater than a threshold. In response to the change frequency being above the threshold, the de-ringing circuitry determines a weight. Based at least in part on the weight, the de-ringing circuitry blends the scaled image content and the fallback scaler output based at least in part on the weight.
Claims20
A method, comprising:
- receiving, at de-ringing circuitry of a display pipeline of an electronic device, scaled image content based on image data;
- receiving, at the de-ringing circuitry, a fallback scaler output;
- determining whether the image data has a change frequency greater than a threshold;
- in response to the change frequency being above the threshold, determining a weight;
- and
- blending the scaled image content and the fallback scaler output based at least in part on the weight.
A display pipeline system of an electronic device, comprising:
- a scaler configured to generate scaled image content by scaling image data using a first scaling process and to generate a fallback scaler output using a second scaling process;
- and
- de-ringing circuitry configured to:
- receive the scaled image content from the scaler;
- receive the fallback scaler output from the scaler;
- determine a change frequency of the image data;
- and
- output de-ringed scaled content based on the change frequency and the scaled image content or the fallback scaler output.
De-ringing circuitry of an electronic device that is configured to:
- receive linear-scaled image content from image data;
- determine pixel differences in the image data;
- determine a weight for the linear-scaled image content based at least in part on the pixel differences;
- and
- output a de-ringed scaled image data based at least in part on the weight applied to the linear-scaled image content.
Dependencies are inferred from the claim text.