Patent ID: 9172849
Filing Date: 2015-10-27
Classification: H04N

Abstract:
1. A method for processing colour components of digital image pixels for which each colour component is represented by a value, the method comprising, for each pixel: reducing a number N of bits allocated to defining the colour component value of at least one of the colour components by at least one bit from N bits to N−1 or less bits to free at least one bit for allocation of an at least one look-up table selection bit; allocating the at least one look-up table selection bit to the at least one bit freed by the reduction of the number of bits allocated to the definition of the at least one colour component value; setting the at least one look-up table selection bit to a value indicating a selected look-up table from among a plurality of look-up tables, to use to transform the colour component values of the pixel, wherein each look-up table of the plurality of look-up tables respectively corresponds to a different colour transformation algorithm of a plurality of colour transformation algorithms; and transforming colour component values of a pixel including the at least one reduced colour component value using the selected look-up table in order to change the physical appearance of the pixel.