Patent ID: 8265419

Claim:
An image processing apparatus for adjusting luminance of a target pixel, the apparatus comprising: an image decoding unit, that decodes a data stream to generate a plurality of images comprising a current image having the target pixel; and an adjusting unit, coupled to the image decoding unit, comprising: an edge keeping index (EKI) generating unit, that generates an edge intensity value for the target pixel according to an original luminance value of the target pixel and an original luminance value of at least one neighboring pixel associated with the target pixel; and a noise reducing unit, coupled to the EKI generating unit, that determines a first adjusted luminance value of the target pixel according to the original luminance value of the target pixel and the original luminance value of the at least one neighboring pixel associated with the target pixel, and that generates a static adjusted luminance value of the target pixel according to the original luminance value, the first adjusted luminance value, and a first adjustment value of the target pixel, the adjustment value being determined according to the edge intensity value.