An arbitration structure, a method, and a computer program are provided for an arbitration scheme that can handle a plurality of memory commands in an operating system. The body includes an outlet end and an ozone tube, and the outlet end has inner threads for screwing with a casing, between the casing and the outlet end is defined an accommodating space. If the pixel is in a smooth color gradient transition area, the pixel value may be adjusted in some embodiments using an additional dither or dither pattern to reduce differences between the pixel values of the selected pixel and the additional average pixel values exceeding the lower threshold.