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US 2014/0176595 A1Published application
Image processing device and method thereof
AssigneeSamsung Display Co., Ltd.
InventorsSeiki TAKAHASHI, Hiroshi OHISHI
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Abstract
A image processing method converts an input signal to a first image signal of a first color gamut, converts a second color gamut to a second image signal for expression in an image output device having the first color gamut, determines a blend coefficient for defining a synthesis ratio of the first and second image signals, and synthesizes the first and second image signals using a ratio based on the blend coefficient to generate a synthesis image signal. The blend coefficient may be based on a value V and a saturation S obtained from the input signal. A color synthesis unit synthesizes the first and second image signals using a ratio according to the determined blend coefficient.
Claims20
An image processing device, comprising:
- a signal input unit configured to convert an input signal indicating an image to a first image signal of a first color gamut, the first image signal being linear;
- a color gamut conversion unit configured to convert a second color gamut to a second image signal for expression in an image output device having the first color gamut, the second color gamut being wider than the first color gamut;
- a blend coefficient deciding unit configured to determine a blend coefficient for defining a synthesis ratio of the first image signal and the second image signal based on a value V and a saturation S obtained from the input signal;
- and
- a color synthesis unit configured to synthesize the first and second image signals using a ratio based on the blend coefficient to generate a synthesis image signal,
- wherein the blend coefficient deciding unit:
- performs inverse conversion on the second image signal corresponding to a boundary of a color gamut;
- obtains a boundary value for value V and a boundary value for saturation S corresponding to a non-overflow condition, wherein an overflow condition corresponds to a state where the synthesis image signal is not included in a range between 0 to 1;
- determines a first blend coefficient when the value V is more than the boundary value for V or the saturation is more than the boundary value for S;
- and
- determines a second blend coefficient when the value V is less than the boundary value of V and the saturation is less than the boundary value for S, the second blend coefficient being greater than the first blend coefficient and less than 1.
8 more elements
An image processing device, comprising:
- a signal input unit configured to convert an input signal indicating an image to a first image signal of a first color gamut, the first image signal being linear;
- a color gamut conversion unit configured to convert a second color gamut to a second image signal for expression in an image output device having the first color gamut, the second color gamut being wider than the first color gamut;
- a blend coefficient deciding unit configured to determine a blend coefficient for defining a synthesis ratio of the first image signal and the second image signal;
- and
- a color synthesis unit configured to synthesize the first and second image signals according to a ratio based on the blend coefficient to generate a synthesis image signal, wherein the blend coefficient deciding unit:
- determines an overflow condition directly from the second image signal,
- determines a first blend coefficient when the overflow condition is generated, and
- determines a second blend coefficient which is greater than the first blend coefficient and less than 1 when the overflow condition is not generated.
5 more elements
An image processing method, comprising:
- converting an input signal indicating an image to a first image signal of a first color gamut, the first image signal being linear;
- converting a second color gamut to a second image signal for expression in an image output device having the first color gamut, the second color gamut being wider than the first color gamut;
- determining a blend coefficient for defining a synthesis ratio of the first image signal and second image signal based on a value V and a saturation S obtained from the input signal;
- and
- synthesizing the first and second image signals using a ratio based on the blend coefficient to generate a synthesis image signal,
- wherein the determining the blend coefficient comprises:
- performing inverse conversion from the first image signal to the second image signal corresponding to a boundary of a color gamut;
- obtaining a first boundary value of V and a first boundary value of S corresponding to a non-overflow condition, an overflow condition indicating a state where the synthesis image signal is not included in a range between 0 to 1;
- determining a first blend coefficient when value V is greater than the first boundary value of V or saturation S is greater than the first boundary value of S;
- and
- determining a second blend coefficient when value V is less than the first boundary value of V and saturation is less than the first boundary value S, the second blend coefficient being greater than the first blend coefficient and less than 1.
8 more elements
An image processing method comprising:
- converting an input signal indicating an image to a first image signal of a first color gamut, the first image signal being linear;
- converting a second color gamut to a second image signal for expression in an image output device having the first color gamut, the second color gamut wider than the first color gamut;
- determining a blend coefficient for defining a synthesis ratio of the first image signal and the second image signal;
- and
- synthesizing the first and second image signals using a ratio based on the blend coefficient to generate a synthesis image signal,
- wherein the determining the blend coefficient includes:
- determining an overflow condition directly from the second image signal,
- determining a first blend coefficient corresponding to an overflow condition, and
- determining a second blend coefficient corresponding to a non-overflow condition, the second blend coefficient being more than the first blend coefficient and less than 1.
6 more elements
An image processing method, comprising:
- converting an input signal to a first image signal of a first color gamut;
- converting a second color gamut to a second image signal for expression in an image output device having the first color gamut;
- determining a blend coefficient for defining a synthesis ratio of the first and second image signals, the blend coefficient based on a value V and a saturation S obtained from the input signal;
- and
- synthesizing the first and second image signals using a ratio based on the blend coefficient to generate a synthesis image signal.
2 more elements
Dependencies are inferred from the claim text.