Certain examples described herein relate to a color processing apparatus and a method of generating configuration data for a color rendering device. The color rendering device operates based on color state instructions indicating output color states for portions of a rendered output. Render data may be generated by applying a halftone matrix and color data may indicate probability values for the output color states for input image areas corresponding to the portions of the rendered output. In described examples, configuration data defines an order of output color states for application of the halftone matrix. In the order, the output color states are grouped within the data based on color properties of a rendered output and an order within the clusters is based on colorant composition.

An image processing apparatus comprises: a first obtainment unit configured to obtain HDR data which represents a high-dynamic range (HDR) image; a second obtainment unit configured to obtain print information to perform printing based on the HDR data obtained by the first obtainment unit; a setting unit configured to set luminance information to be a target of the HDR data obtained by the first obtainment unit; and a conversion unit configured to convert a dynamic range of luminance of the HDR data, which has been obtained by the first obtainment unit and has been set by the setting unit with the luminance information to be the target, into a dynamic range by which printing is to be performed based on the print information obtained by the second obtainment unit.

A method for detecting background color of a scanned document uses dynamic weights to adjust components of the L*a*b* color space. In accordance with one aspect of the disclosure, the L*a*b* values belonging to pixels within a block are applied to a series of thresholds. In response to the L*a*b* values meeting the thresholds, a given color pixel within the block is reclassified as being monochromatic. The weight values are dynamically updated based on at least one of the L*a*b* values of the given pixel. The thresholding is repeated for remaining pixels in the document. Using the classified pixels, an output document is generated where the background pixels are monochromatic. The output document is transmitted to a display device in communication with the server computer.

The image processing apparatus obtains a degree of variation in signal values of a plurality of pixels included in a region of a predetermined size that includes a pixel of interest of image data obtained by reading a document on which a halftone-processed image has been printed, obtains a feature amount indicating a brightness of the region. The apparatus updates a difference between the obtained feature amount and an index value corresponding to the obtained degree of variation in accordance with whether or not the difference is larger than a predetermined threshold, with respect to a plurality of index values respectively corresponding to a plurality of mutually different degrees of variation, decides a correction value of the pixel of interest using the updated difference and the index value, and corrects a value of the pixel of interest using the decided correction value.

An image display apparatus displays an image to be printed on a desired printing medium by using a desired printing apparatus. In this process, medium images corresponding to the tint of the printing medium illuminated with one of illumination light fluxes having a plurality of color temperatures are displayed on a specific display with the medium images associated with the color temperatures of the illumination light fluxes, and specification of one of the medium images or the color temperature associated with the medium image is accepted. When the specification is made, an illumination light flux reflecting image having the tint of the image printed on the printing medium by the printing apparatus and illuminated with the illumination light flux having the color temperature corresponding to the specification is displayed on the specific display.

The present disclosure relates to a method, an apparatus and a device for converting a style of an image, wherein the method comprises: acquiring a luminance component (Y) and chrominance components (U, V) in a YUV space of an image to be processed; performing a group convolution processing on the luminance component (Y) and the chrominance components (U, V) in the YUV space of the image to be processed to obtain content features and style features of the image to be processed; and performing a fusion processing on the content features, the style features and target style features of the image to be processed to convert the image to be processed into an image of a target style.

An image processing apparatus includes an acquisition unit configured to acquire a chromaticity value, which is a measurement result for a sheet to be measured, by using a sensor in which a light source has fixed characteristics; a designation unit configured to designate a condition under which the measurement result is acquired by the sensor; a determination unit configured to determine an optical brightening agent amount contained in the sheet; and a chromaticity value conversion unit configured to convert the chromaticity value, which is acquired by the acquisition unit, by using the condition designated by the designation unit and information about the optical brightening agent amount determined by the determination unit.

The invention provides a colour standard, assembled from a graphic digital input file, in which one or a combination of CMYK, RGB, Lab or spot colour builds are contained. The colour standard comprises a colour target calibration strip which is indicative of the calibration status of a printing press; an output image which is indicative of the digital input file; and a grid chart of spot colour builds, built-in process inks, with their respective process build values available for each spot colour in the digital input file. The colour standard is configured to capture the calibrated state of the press for a particular digital input file in order to achieve a particular colour-managed output image, so that product print runs of the output image can be repeated accurately and consistently over time.

An image processing device and method are provided for adjusting background pixels of an image. The device includes memory which stores a background adjustment component which for each of a plurality of pixels of an input image: computes a background strength of the pixel; computes a luminance strength of the pixel; and computes adjusted luminance and adjusted chrominance values for the pixel, as a function of the background strength and luminance strength of the pixel. An image output component outputs an output image derived from the adjusted luminance and adjusted chrominance values for the plurality of pixels, A processor implements the background adjustment component and image output component.

An image processing device includes a neutral edge detection and enhancement component which, for pixels of an input image, computes an edge strength for the pixel as a function of differences between the input luminance value of the pixel and input luminance values of neighboring pixels, computes a neutral adjustment factor for the pixel as a function of the input luminance value of the pixel, and computes a chroma adjustment factor for the pixel as a function of the input chrominance values of the pixel. An adjusted luminance value for the pixel is computed as a function of the input luminance value, the edge strength, and the neutral adjustment factor. Adjusted chrominance values for the pixel may be computed as a function of the input chrominance value, the edge strength, and the chroma adjustment factor. The system allows detection and enhancement of neutral edges in monochrome and color images.