Patent ID: 6532081
Filing Date: 2003-03-11
Classification: G06T,H04N

Abstract:
A method for building weights used in the generation of a blended look-up table (LUT) which translates an image signal having both pictorial and graphical elements, into an output signal, the method for building weights comprising the steps of:determining a position of a given input point from an input color space for both an input device gamut and an output device gamut; detecting if the given input point is located in an intersection of predefined percentages of the input device gamut and the output device gamut; setting a weight of the input point to x when the given input point is located at the intersection of the predefined percentages of the input device gamut and the output device gamut; detecting if the input point is outside at least one of the input device gamut and the output device gamut; setting the weight of the input point to y when the given point is outside at least one of the input device gamut and the output device gamut; determining if the input point is within the predefined percentage of the output device gamut and anywhere inside the input device gamut; calculating the weight of the input point according to the position of the input point relative to the input device gamut; determining if the input point is (i) within the output device gamut, (ii) outside a predefined percentage of the output device gamut, and (iii) inside the input device gamut; testing to determine if the input point is in a predefined percentage of the input device gamut, when it is determined the input point is (i) within the output device gamut, (ii) outside a predefined percentage of the output device gamut, and (iii) inside the input device gamut; calculating the weight according to the position of the input point relative to the output device gamut, when the testing step determines the input point is in the predefined percentage of the input device gamut; and calculating the weight according to the position of the input point relative to both the input device gamut and the output device gamut, when the testing step determines the input point is outside the predefined percentage of the input device gamut.