Image details preservation and enhancement

摘要

The appearance of image details can be preserved and/or enhanced by applying contrast adaptive gain to the high spatial frequency component of the luminance information. The image details in bright and/or dark regions can be further boosted by applying a local mean adaptive gain. The contrast transfer mapping curve for luminance contrast enhancement can be re-scaled to account for the applied gain. The re-scaling may be performed from frame to frame of displayed video. The re-scaling may be temporally controlled for subsequent frames to make the re-scaling change gradually to prevent flickering.

主权项

1. A method of processing an image comprising a plurality of pixels having luminance information associated therewith, the method comprising:
processing the luminance information to generate first components of the luminance information and second components of the luminance information, wherein the first components correspond to a higher spatial frequency than that of the second components; applying a contrast transfer mapping to the second components of the luminance information using contrast transfer mapping information; determining, based on the contrast transfer mapping information, whether to apply the contrast transfer mapping to the first components of the luminance information; and applying the contrast transfer mapping to the first components of the luminance information, when it is determined to do so.