Patent ID: 7639283
Filing Date: 2009-12-29
Classification: H04N

Abstract:
1. A method of adjusting an n×n color signal matrix used to multiply a column vector input color value, where n is a number of primary colors in a chosen color space, the method comprising: adjusting, using a color signal matrix adjustment device, a single first color signal matrix related value; to obtain a color signal matrix adjustment; and automatically adapting at least two color signal matrix parameters other than said single first color signal matrix related value in dependence upon said color signal matrix parameter adjustment, wherein: said single first color signal matrix related value is a first color signal matrix parameter corresponding to a first color; said color signal matrix adjustment is an increase of said first color signal matrix parameter by an amount δ to change a reproduction of said first color; and said automatically adapting step includes multiplying all color matrix parameters corresponding to colors other than said first color by a factor (ΣX+δ)/ΣX, in which ΣX is a sum of color signal matrix parameters corresponding to said first color, to substantially maintain a white reproduction.