A skin color image gamut weight detecting method and a device thereof are provided. The method includes: receiving an image including first color components and second color components; obtaining a skin color region, a skin color category, and a first gamut; obtaining first color component values and first cardinal numbers according to the first color components; obtaining second color component values and a plurality of second cardinal numbers according to the second color components; obtaining a second gamut and a weight center according to the skin color category, the first cardinal numbers, the second cardinal numbers, the first color component values, and the second color component values; obtaining a first weight area and a second weight area according to the first gamut and the second gamut; and obtaining a skin color gamut weight map according to the weight center, the first weight area, and the second weight area.

Techniques for interactively determining/visualizing the color content of a source image and how the corresponding image data is mapped to device colors are described herein. For example, the color content of a digital image can be converted between different color spaces to identify gamut limitations of an output device (e.g., a printing assembly), discover color(s) that cannot be accurately reproduced, etc. Color space conversions enable the transformation of the color content of the digital image from device-specific colorants to a device-independent representation (and vice versa). In some embodiments, these transformations are facilitated using lookup tables that are implemented in graphical processing unit-resident memory.

A color parameter generation apparatus includes a hardware processor that generates color parameters to be used for printing a sample image based on a read image, in which the hardware processor determines a flare degree at a predetermined position of the read image, and executes predetermined processing for correcting the color parameters in the predetermined position based on the determined flare degree.

A method of color mapping color values of an oligochromatic pattern comprising the following steps: determining an image-gamut, in a N-dimensional device independent color system (ND-DICS), of said oligochromatic pattern; wherein said image-gamut comprises said color values of said oligochromatic pattern; and determining a skeleton (500) of said image-gamut; and performing an adaption on said skeleton (500) in said ND-DICS by a set of N-dimensional-transforming steps (30) and determining for points of said skeleton (500), a path in said ND-DICS that corresponds to said adaption; and color mapping said color values, of said oligochromatic pattern, based on said determined paths (35) of said points of said skeleton (500).

An image processing apparatus includes a processor configured to adjust a reproduction parameter for correcting image visibility by changing a degree by which the reproduction parameter is to be changed from a reference value in accordance with a ratio of a second color gamut to a first color gamut. The first color gamut indicates a range in which an image is expressible by a first device. The second color gamut indicates a range in which an image is expressible by a second device.

The disclosure relates to a color gamut mapping device that allows a gamma characteristic for each color to be tuned to match a target gamma curve through color gamut mapping, a tuning method thereof, and an image processor including the same. The color gamut mapping device controls a hue and saturation of an image signal to match a target color gamut using a hue parameter assigned to each of a plurality of hue axes and a saturation parameter assigned to correspond to each of a plurality of saturation control areas of each hue axis, and the color gamut mapping device changes the saturation of the image signal by changing the saturation parameter which is assigned to each hue axis and corresponds to the uppermost saturation control area so that a gamma characteristic for each color of the image signal is changed to match a target gamma curve for each color.

Disclosed are an image information processing method, an electronic device and a storage medium. The method includes: acquiring a color gamut space configured for an interface to be displayed; acquiring a color gamut space of a screen; if the color gamut space configured for the interface to be displayed is inconsistent with the color gamut space of the screen, detecting whether a color gamut space conversion condition is satisfied; and if the color gamut space conversion condition is satisfied, converting the color gamut space of the screen to be consistent with the color gamut space configured for the interface to be displayed.

Techniques for interactively determining/visualizing the color content of a source image and how the corresponding image data is mapped to device colors are described herein. For example, the color content of a digital image can be converted between different color spaces to identify gamut limitations of an output device (e.g., a printing assembly), discover color(s) that cannot be accurately reproduced, etc. Color space conversions enable the transformation of the color content of the digital image from device-specific colorants to a device-independent representation (and vice versa). In some embodiments, these transformations are facilitated using lookup tables that are implemented in graphical processing unit-resident memory.

The present principles relate to a method and device for gamut mapping from a first color gamut towards a second color gamut. The method comprises obtaining a preserved key color (prsv_color.sub.K0) and a hue alignment angle (θ.sub.K0) of the key color (color.sub.K0) for each key color (color.sub.K0) of at least 3 key colors to define a preserved gamut and a rotated gamut; and performing a hue mapping of a current color (color) from the first color gamut towards the second color gamut wherein in case the current color (color) is in a preserved gamut defined by the preserved key color (prsv_color.sub.K0), the hue mapped current color is unchanged, and in case the current color is out of the preserved gamut, the hue mapped current color is calculated from the hue alignment angle (θ.sub.K0) of two adjacent key colors of the current color (rotated gamut) and from the preserved area.

Method of color measuring a color of a rendered copy of a digital image, by a color-measuring-device (3000) for color measuring in a plurality of spectral ranges (r.sub.1 . . . r.sub.Q); wherein said method comprises the step: measuring said color is measured in a sub-set (s.sub.1 . . . s.sub.M; .sub.3305) of said plurality of spectral ranges (r.sub.1 . . . r.sub.Q); and wherein said sub-set (s.sub.1 . . . s.sub.M) is determined by: selecting a color of a gamut boundary of said digital image (1200); and determining of said color for said plurality of spectral ranges (r.sub.1 . . . r.sub.Q) corresponding spectral reflectance factors (v.sub.1 . . . v.sub.Q); and adding a spectral range (r.sub.i), having a minimum and maximum spectral reflectance factor, to said sub-set (s.sub.1 . . . s.sub.M) wherein its corresponding spectral reflectance value (v.sub.i) is larger than 10% of said maximum spectral reflectance factor minus said minimum spectral reflectance factor.