Hue changing color gamut mapping

A method for gamut mapping source colors into target colors from a source color gamut towards a target color gamut, comprising:

• adaptively changing a source hue of at least one source specific color towards a target hue of a corresponding target specific color based on a difference a between a hue of this source specific color and a hue of this target specific color to determine a mapped specific color;
• performing color gamut mapping for the source colors of the source color gamut towards the target color gamut based on the mapped specific colors,
• wherein the specific colors are at least one selected from a group of primary colors, secondary colors, a group of primary colors and secondary colors,
• wherein said changing of hue is represented by a hue rotation angle
• θ
• =
• α
• *
• cos
• 
• (
• γ
• -
• β
• 2
• )
• in a hue-chroma plane having an origin O defined by a zero chroma value in this plane, where, if said at least one source specific color and corresponding target specific color are represented respectively by (Ps) and (Pt) in said hue-chroma plane, α=, β=, and γ=.

A system for gamut mapping source colors into target colors from a source color gamut towards a target color gamut, comprising:

• a processor configured to adaptively change a source hue of at least one source specific color towards a target hue of a corresponding target specific color based on a difference a between a hue of this source specific color and a hue of this target specific color to determine a mapped specific color and to perform color gamut mapping for the source colors of the source color gamut towards the target color gamut based on the mapped specific colors,
• wherein the specific colors are at least one selected from a group of primary colors, secondary colors, a group of primary colors and secondary colors,
• wherein said changing of hue is represented by a hue rotation angle
• θ
• =
• α
• *
• cos
• 
• (
• γ
• -
• β
• 2
• )
• in a hue-chroma plane having an origin O defined by a zero chroma value in this plane,
• where, if said at least one source specific color and corresponding target specific color are represented respectively by (Ps) and (Pt) in said hue-chroma plane, α=, β=, and γ=.

A non-transitory computer readable storage medium comprising a computer program including a set of instructions executable by a processor, the instructions comprising:

• adaptively changing a source hue of at least one source specific color towards a target hue of a corresponding target specific color based on a difference a between a hue of this source specific color and a hue of this target specific color to determine a mapped specific color;
• performing color gamut mapping for the source colors of the source color gamut towards the target color gamut based on the mapped specific colors,
• wherein the specific colors are at least one selected from a group of primary colors, secondary colors, a group of primary colors and secondary colors,
• wherein said changing of hue is represented by a hue rotation angle
• θ
• =
• α
• *
• cos
• 
• (
• γ
• -
• β
• 2
• )
• in a hue-chroma plane having an origin O defined by a zero chroma value in this plane, where, if said at least one source specific color and corresponding target specific color are represented respectively by (Ps) and (Pt) in said hue-chroma plane, α=, β=, and γ=.