Method and module for processing image data

A module for correcting and applying an input value applied to a plurality of pixels in a display comprising a plurality of pixels, the module comprising:

• a processor configured to determine a plurality of unit blocks by dividing the plurality of pixels in a preset unit, receive a first input value for a current pixel included in a current block of the plurality of unit blocks, determine a middle input value of a real number by correcting the first input value by applying a gain value and offset value assigned to the current block, compare a product of a decimal value indicative of a decimal part of the middle input value and a size of the current block with a root value corresponding to the current pixel, determine a final input value by performing rounding-up or rounding-off on the middle input value based on a result of the comparison, and apply the final input value to the current pixelof the display;
• and
• memory configured to store the gain value, the offset value and the root value;
• the stored gain value, the stored offset value and the stored root value being used to calculate the final input value being applied to the current pixel;
• said root value, corresponding to the current pixel, being calculated using the coordinate values of the current pixel within the current block and the size of the current block.