1. A pixel processing method, comprising: selecting a first plurality of color component values of a first plurality of pixels within a pixel block of a buffering device, and performing a first color component process upon a first target pixel in the first plurality of pixels to determine a first target color component value of the first target pixel, and storing the first target color component value; and while the first color component process is being performed, simultaneously selecting a second plurality of color component values of a second plurality of pixels within the pixel block and performing a second color component process upon a second target pixel in the second plurality of pixels according to the second plurality of color component values to determine at least one underdetermined target color component value of the second target pixel, wherein the second target pixel has been processed by the first color component process.