DITHERING WITH REDUCTION OF VISUAL ARTIFACTS

A graphics processing apparatus includes a memory device and a display engine coupled to the memory device. The display engine is configured to apply dither on a region of an image and modify a first pixel of an image stored in the memory based on pseudo-random noise to reduce color banding impressi...

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Bibliographische Detailangaben
Hauptverfasser:	BHATTACHARJEE, Susanta, N, Darshan, SAMEER KALATHIL, Perazhi, NEDUNURI, Kishore
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS
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Beschreibung
Zusammenfassung:	A graphics processing apparatus includes a memory device and a display engine coupled to the memory device. The display engine is configured to apply dither on a region of an image and modify a first pixel of an image stored in the memory based on pseudo-random noise to reduce color banding impressions. The pseudo-random noise is based on one or more the local brightness estimation (1706) and eventually one or more prior noise levels. The display engine determines the local brightness estimation based on an average brightness of a pixel region surrounding the first pixel and the first pixel (1704). In some examples, the display engine is configured to bound the pseudo-random noise based on a noise applied to a pixel in a same position as that of the first pixel in a prior frame within a same scene (1710).