Local dimming processing algorithm and correction system

A method of providing full array local dimming to a display comprising:

• dividing an image for the display having a plurality of pixels into a plurality of zones which each have at least one LED associate therewith;
• performing an image processing algorithm with at least one processor having instructions for:
• determining a new pixel value for each of the plurality of pixels;
• mapping the new pixel value to a prior pixel value for each of the plurality of pixels;
• scaling the image of the zone bilinearly;
• repeating the determining, mapping and scaling until an approximation value is reached;
• and
• compiling the repeated results into a data set;
• and
• making an illumination decision from the data set with the processor based on an evaluation algorithm in which only luminosity data is utilized and color and chroma data are discarded from the data set to reduce memory and processing requirements;
• wherein the illumination decision is for the at least one LED associated with one zone of the plurality of zones;
• and
• wherein repeating the determining, mapping, and scaling comprises progressively reducing a spatial resolution of the image to generate a reduced resolution luminance only representation utilized for zone level LED illumination decisions.