The present invention relates to an encoding device for saving the number of bits of codes. The first principle bilateral filtered image component corresponds to a second pixel value of a set, the second pixel value greater than or equal to a first pixel value. The center footrest allows a person to be moved around in tight quarters without interference caused by conventional folding dual footrests. The plurality of solder bumps is pressed into the plurality of underfill bumps until the plurality of solder bumps contacts the plurality of contacts. The oblong channel may be further defined by first and second parallel flat walls.