Abstract: Customization of display color profiles is described. A first interface for customizing a global color preference is generated. Feedback from a user is received via the first interface. The feedback describes a customized global color preference. A second interface for customizing a memory color preference is generated. Feedback is received from the user via the second interface. The feedback describes the customized memory color preference. A color preference profile is generated using the customized global color preference and the customized memory color preference. The color preference profile describes the user's preference for how color is presented. The color preference profile is associated with a user profile of the user. Visual content is rendered on a display of the device in accordance with the color preference profile.

Abstract: Among various embodiments of the present disclosure, color calibration can be performed on a printing apparatus by using a preconfigured color map coded to reduce a color difference of a selected reference color sample relative to a color standard, where the selected reference color sample substantially matches a first test color sample printed by the printing apparatus. Installing the preconfigured color map can enable recalibrating the printing apparatus to use the preconfigured color map in adjusting an amount of a number of colorants utilized in printing a second test color sample to reduce the number of color differences of the second test color sample relative to the color standard.

Abstract: A method for color reproduction in a display device includes receiving spectral color input to be displayed on the display device. The method additionally includes selecting a primary from a plurality of available primaries that is a closest match of a spectral reflectance of the spectral color input, wherein each of the plurality of available primaries is assigned an association with an associated spectral reflectance. The method also includes displaying the selected primary in a temporal frame of a set of temporal frames for a pixel and passing remaining spectral errors to a next temporal frame of the set of temporal frames. The method further includes passing remaining spectral errors to neighbor pixels for spatial error diffusion at each spectral band after all temporal frames of the set of temporal frames are used.

Abstract: A method for reducing bit-depth of image data for an imaging device includes receiving an image frame for display to the imaging device. The method additionally includes applying temporal error diffusion for the image frame to produce a plurality of image subframes, wherein temporal errors generated in one subframe of the image frame are passed to a next subframe of the image frame for temporal error diffusion. The method also includes applying spatial error diffusion to remaining temporal errors from the temporal error diffusion of the image frame.

Abstract: Subdividing a color space is described for vector error diffusion which includes obtaining color coordinates for each primary color in the color space, and comparing the color coordinates to a threshold value for each coordinate plane of the color space. In response to the comparing, each primary color is grouped into a quadrant of the color space, wherein each quadrant is defined by the threshold value for each coordinate plane. In other aspects, a mapping a color to a closet primary color is described in a color space that includes a display determining color coordinates of the color and identifying a matching quadrant of a plurality of quadrants dividing the color space, wherein the determined color coordinates fall within the matching quadrant. A representative display device searches for the closest primary color within the matching quadrant and maps the color to the closest primary color found.

Abstract: Methods and apparatus for rendering colors in displays, such as adjustable interferometric modulation displays can produce many colors with different sub-sets of primary colors. Received colors to be rendered are analyzed to determine when the colors to be rendered are within a predefined neutral region of a color space. Temporal primary colors may be generated to be used for rendering the received colors in a color space that are generated by temporal modulation using at least two temporal subframes to mix first and second primary colors of a display, such as white and black primaries. The temporal primary colors are used when rendering colors that lie within the predefined neutral region of the color space. When white and black primaries are used for temporal modulation, the produced grayscale temporal primaries are more robust than using two complementary colors, affording more robust neutral and near neutral colors.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for making and controlling single-mirror interferometric modulators (IMODs), which may be multi-state IMODs or analog IMODs. In one aspect, a movable reflector stack or an absorber stack of an IMOD may include at least one protrusion that is configured to cause the movable reflector stack to be tilted relative to the absorber layer when the movable reflector stack is moved close to the absorber stack. The protrusion may be configured to cause color averaging when the IMOD is in a white state. The absorber stack may include an absorber layer having a lower extinction coefficient value at a red wavelength and a higher extinction coefficient value at a blue wavelength.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for displaying high bit-depth images using temporal modulation on display devices including display elements that have multiple primary colors. In order to reduce visual artifacts produced by angular metamerism, the display elements are configured to display only those combinations of the different primary colors that satisfy certain constraints. Color combinations of the multiple primary colors that satisfy these constraints are included in a constrained color palette that includes fewer than all the possible colors that can be provided by all combinations of the primary colors.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for making and controlling single-mirror interferometric modulators (IMODs), which may be multi-state IMODs or analog IMODs. In one aspect, a movable reflector stack or an absorber stack of an IMOD may include at least one protrusion that is configured to cause the movable reflector stack to be tilted relative to the absorber layer when the movable reflector stack is moved close to the absorber stack. The protrusion may be configured to cause color averaging when the IMOD is in a white state. The absorber stack may include an absorber layer having a lower extinction coefficient value at a red wavelength and a higher extinction coefficient value at a blue wavelength.

Abstract: A method for color reproduction in a display device includes receiving spectral color input to be displayed on the display device. The method additionally includes selecting a primary from a plurality of available primaries that is a closest match of a spectral reflectance of the spectral color input, wherein each of the plurality of available primaries is assigned an association with an associated spectral reflectance. The method also includes displaying the selected primary in a temporal frame of a set of temporal frames for a pixel and passing remaining spectral errors to a next temporal frame of the set of temporal frames. The method further includes passing remaining spectral errors to neighbor pixels for spatial error diffusion at each spectral band after all temporal frames of the set of temporal frames are used.

Abstract: Disclosed are methods and apparatus for rending colors in displays, such as adjustable interferometric modulation displays that can produce many colors with different sub-sets of primary colors. Received colors to be rendered are analyzed to determine when the colors to be rendered are within a predefined neutral region of a color space. Temporal primary colors may be generated to be used for rendering the received colors in a color space that are generated by temporal modulation using at least two temporal subframes to mix first and second primary colors of a display, such as white and black primaries. The temporal primary colors are used when rendering colors that lie within the predefined neutral region of the color space. When white and black primaries are used for temporal modulation, the produced grayscale temporal primaries are more robust than using two complementary colors, affording more robust neutral and near neutral colors.

Abstract: Disclosed are methods and apparatus for color rendering in a binary high-dimensional output device, for example. The methods and apparatus are configured to receive color space data, and then map the received data to an intermediate color space. From this intermediated space, color rendering is performed using a pre-generated number of extended primary colors for temporal modulation. Each of the pre-generated extended primary colors is made up of a combination of at least two subframes with each subframe having a respective primary color. Through use of temporally modulated, pre-generated extended primaries in the color space, the methods and apparatus afford a reduction in the diffusion error for subsequent neighboring pixels yet to be rendered, particularly when using constrained devices such as binary high-dimensional output devices.

Abstract: A method for reducing bit-depth of image data for an imaging device includes receiving an image frame for display to the imaging device. The method additionally includes applying temporal error diffusion for the image frame to produce a plurality of image subframes, wherein temporal errors generated in one subframe of the image frame are passed to a next subframe of the image frame for temporal error diffusion. The method also includes applying spatial error diffusion to remaining temporal errors from the temporal error diffusion of the image frame.

Abstract: Subdividing a color space is described for vector error diffusion which includes obtaining color coordinates for each primary color in the color space, and comparing the color coordinates to a threshold value for each coordinate plane of the color space. In response to the comparing, each primary color is grouped into a quadrant of the color space, wherein each quadrant is defined by the threshold value for each coordinate plane. In other aspects, a mapping a color to a closet primary color is described in a color space that includes a display determining color coordinates of the color and identifying a matching quadrant of a plurality of quadrants dividing the color space, wherein the determined color coordinates fall within the matching quadrant. A representative display device searches for the closest primary color within the matching quadrant and maps the color to the closest primary color found.

Abstract: In an implementation, conversion of K-only data from a source CMYK color space to a destination CMYK color space is managed. The destination CMYK color space is transformed to a virtual RGB color space, in which a neutral axis of the virtual RGB color space is set to be mapped to destination K-only output colors in a color separation table for mapping of source K-only grays to destination K-only grays. The source CMYK color space is converted to a device independent color space and the conversion is adjusted such that the source K-only grays are forced to have the same chrominance as the neutral axis of the virtual RGB color space in the color separation table. The LUT is generated to include a K-only mapping by combining the virtual RGB color space with the adjusted conversion of the source K-only grays.

Abstract: In an implementation, conversion of K-only data from a source CMYK color space to a destination CMYK color space is managed. The destination CMYK color space is transformed to a virtual RGB color space, in which a neutral axis of the virtual RGB color space is set to be mapped to destination K-only output colors in a color separation table for mapping of source K-only grays to destination K-only grays. The source CMYK color space is converted to a device independent color space and the conversion is adjusted such that the source K-only grays are forced to have the same chrominance as the neutral axis of the virtual RGB color space in the color separation table. The LUT is generated to include a K-only mapping by combining the virtual RGB color space with the adjusted conversion of the source K-only grays.

Abstract: A preferred skin tone region is determined within a luminance-chrominance color space for each of a plurality of luminance values. Additional preferred skin tone regions are determined by interpolation in view of the initially determined preferred skin tone regions. An ellipsoid skin-color model is generated in the luminance-chrominance color space based on the preferred skin tone regions. The ellipsoid skin-color is used to detect a skin color pixel in an image and adjust one or more color values for the skin color pixel.

Abstract: A system and method for determining composite grays using device values. Device values are received from image data on which color separation was performed. Gray component replacement are determined on black point device values by using target lightness values, target chromaticity values, and target black device values. A printing device and a computer readable media having computer instructions for implementing the method of determining composite grays are also provided.

Abstract: Among various embodiments of the present disclosure, color calibration can be performed on a printing apparatus by using a preconfigured color map coded to reduce a color difference of a selected reference color sample relative to a color standard, where the selected reference color sample substantially matches a first test color sample printed by the printing apparatus. Installing the preconfigured color map can enable recalibrating the printing apparatus to use the preconfigured color map in adjusting an amount of a number of colorants utilized in printing a second test color sample to reduce the number of color differences of the second test color sample relative to the color standard.

Abstract: A linearization data structure is generated for a pen, in view of another pen, for conforming output intensities of the pen to output intensities of the other pen.