Patent ID: 7324709

Claim:
A method, comprising: identifying a plurality of center pixels of a sub-image; evaluating a brightness level for each of the plurality of center pixels of the sub-image; and assigning a brightness level to a target pixel responsive to evaluating the brightness level for each of the plurality of center pixels of the sub-image; where assigning the brightness level includes assigning a first interpolated brightness level to a target pixel responsive to determining a first brightness level of a half of the plurality of center pixels and responsive to determining a second brightness level of an other half of the plurality of center pixels; where assigning the brightness level includes assigning a second interpolated brightness level to the target pixel responsive to determining the first brightness level of at least one of the plurality of center pixels and responsive to determining the second brightness level of other of the plurality of center pixels; where assigning the brightness level includes assigning a third interpolated brightness level to the target pixel responsive to determining the first, second, and third brightness levels in at least a first, second, and third of the plurality of center pixels; and where assigning the brightness level includes assigning a fourth interpolated brightness level to the target pixel responsive to determining four different brightness levels of the plurality of center pixels.