Color Transformation Luminance Correction Method and Device
First Claim
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1. A method of color correction in a luminance direction, comprising:
- applying a color transformation (T) to an input color (Ci) defined with respect to put primaries to yield a transformed color (Ct) defined with respect to display primaries, wherein the display primaries form a primary system different than the primary system formed by the input primaries;
determining a scaling factor (f) on the basis of a first display driving value representation (Rs,Gs,Bs) of the input color (Ci) and a second display driving value representation (Rt,Gt,Bt) of the transformed color (Ct); and
multiplying a color representation of the transformed color (Ct) with the scaling factor (f) to obtain an output color (Co).
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Abstract
The method of color correction in a luminance direction, comprises: applying a color transformation (T) to an input color (Ci), yielding a transformed color (Ct); determining a scaling factor (f) on the basis of a first display driving value representation (Rs5Gs5Bs) of the input color (Ci) and a second display driving value representation (Rt5Gt5Bt) of the transformed color (Ct); and multiplying a color representation of the transformed color (Ct) with the scaling factor (f) to obtain an output color (Co). It can be used to mitigate luminance errors introduced by the transformation (T).
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9 Claims
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1. A method of color correction in a luminance direction, comprising:
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applying a color transformation (T) to an input color (Ci) defined with respect to put primaries to yield a transformed color (Ct) defined with respect to display primaries, wherein the display primaries form a primary system different than the primary system formed by the input primaries; determining a scaling factor (f) on the basis of a first display driving value representation (Rs,Gs,Bs) of the input color (Ci) and a second display driving value representation (Rt,Gt,Bt) of the transformed color (Ct); and multiplying a color representation of the transformed color (Ct) with the scaling factor (f) to obtain an output color (Co). - View Dependent Claims (2, 3, 4, 9)
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5. A device (100) for color correction in a luminance direction, comprising:
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a color transformation unit (101), arranged to apply a color transformation (T) to an input color (Ci) defined with respect to input primaries to yield a transformed color (Ct) defined with respect to display primaries, wherein the display primaries form a primary system different than the primary system formed by the input primaries; a scaling factor determination unit (107), arranged to determine a scaling factor (f) on the basis of a first display driving value representation (Rs,Gs,Bs) of the input color (Ci) and a second display driving value representation (Rt,Gt,Bt) of the transformed color (Ct); and a color scaling unit (109), arranged to multiplying a color representation of the transformed color (Ct) with the scaling factor (f) to obtain an output color (Co). - View Dependent Claims (6, 7, 8)
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Specification