Image processing apparatus and image processing method

An apparatus capable of adjusting luminance of a target pixel, the apparatus comprising:

• a processor configured to perform operations comprising:
• decoding a data stream to generate a plurality of images comprising a current image having the target pixel;
• determining an edge intensity value of 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;
• generating 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
• determining 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, the first adjustment value being determined according to the edge intensity value.

An image processing apparatus for adjusting the 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 a previous image having a corresponding pixel mapped to the target pixel;
• and
• an image adjusting unit, coupled to the image decoding unit, comprising:
• an EKI generating unit, that generates an original EKI, a first EKI, and a dynamic noise-reduced EKI of the corresponding pixel according to an original luminance value, a first adjustment value, and a dynamic adjusted luminance value of the corresponding 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 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 that generates a dynamic adjusted luminance value of the target pixel according to the original luminance value, the first adjusted luminance value, and an adjustment value of the target pixel, the adjustment value of the target pixel being obtained by adjusting an adjustment value of the corresponding pixel according to a parameter determined according to the original EKI, the first EKI, and the dynamic noise-reduced EKI of the corresponding pixel.