A method for privacy-retaining face identification comprising dividing at least one input face into a first set of patches, providing an assortment of patch profiles for each patch in the first set of patches, each patch profile in the assortment being associated with a unique index thereby to define an assortment of unique indices, for each individual patch in the input face, finding at least one patch profile within the assortment of patch profiles which most resembles the individual patch, thereby to define a first set of indices from among the assortment of unique indices whose corresponding patch profiles most resemble the input face's patches respectively, and using a privacy preserving computation to generate a physical output indicative of a comparison of the input face and at least one target face by comparing first and second functions of the first set of indices and of a second set of indices respectively, the second set of indices corresponding to patch profiles which most resemble a second set of patches into which the target face has been divided.

System for secure face identification (scifi) and methods useful in conjunction therewith

Mapping of color gamut in a three-dimensional color space is performed by converting coordinates of source reference points to coordinates of destination reference points, and converting coordinates of an initial point to coordinates of a target point based on a first relationship among a first set of volumes and a second relationship among a second set of volumes. The first set of volumes are defined at least in part by the initial point and at least a subset of the source reference points, and the second set of volumes are defined at least in part by the target point and at least a subset of the destination reference points.

Color gamut mapping

A method and system for controlling color output includes receiving a document containing a color image, producing a first output copy of the document using a first color processing path, receiving at least one natural language request to adjust the color output of the device, adjusting the color output of the device, and producing a second output copy of the document. The method and system further includes presenting natural language descriptions of the effects of color processing paths with or without sample palettes to the user either to solicit a suggestion from the user or present the user with choices based upon the natural language request received.

Natural language color communication, and system interface

In a color conversion definition process, first, a profile of a virtual device having a color reproduction range that well simulates a color reproduction range of a printing system is produced. A first color conversion is then defined so as to convert a coordinate point in a color reproduction range of a printer expressed in a first RGB color space to a coordinate point in the color reproduction range of the virtual device expressed in a second RGB color space dependent on the virtual device. A second color conversion is then defined so as to convert a coordinate point in the color reproduction range of the virtual device expressed in the second RGB color space to a coordinate point in the color reproduction range of the printing system expressed in the CMYK color space. The resultant coordinate point represents a color very similar to a color represented by the printing system.

Color conversion definition method, profile production method, color conversion definition apparatus, profile production apparatus, color conversion definition program storage medium, and profile production program storage medium

An image processing method for performing color conversion among a plurality of image forming apparatuses, includes the steps of: a) producing a plurality of color profiles provided for performing color conversion on input image information within a same color space or through different color spaces; and b) selecting one of the plurality of color profiles whereby color in an image formed by one of the plurality of image forming apparatuses may be approximately equal to color of an image formed by another of the plurality of image forming apparatuses.

Image processing method, program, computer readable information recording medium, image processing apparatus and image forming apparatus

A color conversion definition (CCD) creating method of creating CCD converting coordinate points within a color reproduction area (CRA) of 1st device mediating between an image and image data, in 1st RGB color space, depending on 1st device, into coordinate points within CRA of printing in CMYK color space for printing, has 1st CCD creating step of creating 1st CCD for converting the coordinate points within CRA of 1st device in 1st RGB color space into coordinate points within CRA of 2nd device mediating between an image and image data, in 2nd RGB color space, depending on 2nd device, CRA of 2nd device being closer to CRA of the printing than 1st device, and 2nd CCD creating step of creating 2nd CCD for converting the coordinate points within CRA of 2nd device in 2nd RGB color space into coordinate points within CRA of printing in CMYK color space.

Color conversion definition creating method, color conversion definition creating apparatus, and color conversion definition creating program storage medium

When a color image is formed on a transparent sheet with a white color material as background color material and C, M, Y, K color materials as process color materials and has colors determined by the total amount of the color materials that are applied per unit area, image formation failures such as ink drooping and ink fixation failures are prevented from occurring. Of four colors or more including white represented by a CMYKW 1-bit pixel signal, the three colors C, M, Y (gray) are replaced with the color K. After the replacement, for three or more of C, M, Y, K, no white color ink is applied since the transparent sheet is opaque without the white color ink. This control process is effective to reduce the number of applications, i.e., the total amount of inks applied, thereby preventing image formation failures such as ink drooping from occurring.

Image processing method and apparatus, and cpu-readable recording medium

When image is formed by a liquid ejection head, input image data is subjected to conversion processing including tone conversion using a first look-up table (LUT) and density correction or non-uniformity correction in nozzle units using second LUTs. Ink use amount in image formation is predicted from reduced image data which is generated from the input image data. In this, the calculation is made more efficient by applying a third LUT which is compiled according to requirements from the second LUTs, to the reduced image data, rather than using the second LUTs directly. Since the image conversion processing is carried out which combines the first LUT for tone conversion and the third LUT corresponding to the non-uniformity correction, and the ink amount distribution data is calculated from the reduced image data after the conversion, then it is possible to ascertain an accurate ink amount which reflects the image adjustment conditions.

Ink use amount evaluation apparatus and method, and inkjet apparatus

An apparatus includes: a first lookup table storage device which stores a first lookup table; a second lookup table storage device which stores a second lookup table; a halftone table storage device which stores a halftone table; a third lookup table generating device which generates a third lookup table by extracting a portion of the data from the second lookup table; a third lookup table storage device which stores the third lookup table; an evaluation processing device which performs calculation for evaluating a liquid ejection volume, on the basis of the evaluation input signal, the first lookup table, the third lookup table, the halftone table and the liquid volume per dot; and an adjusting device which adjusts the ejection volume on the basis of the evaluation results, in such a manner that the liquid ejection volume does not exceed a specified value.

Liquid ejection volume control apparatus and method, program and inkjet apparatus

The method includes creating: a first table defining conversion relationship from a signal of a first standard color to which limitation of a total amount of ink is not applied into a signal of a second standard color to which the limitation is applied; a second table defining conversion relationship from the signal of the second standard color into a first expansion color signal to which the limitation is applied; a third table defining conversion relationship from a color signal in a device-independent color space corresponding to the signal of the second standard color into a color signal in a device-dependent color space; and a fourth table (color profile) defining conversion relationship from a color signal in the device-independent color space corresponding to the signal of the second standard color into a second expansion color signal in the device-dependent color space by the third and second tables.

Kiyomi Tamagawa

Papers

Color conversion definition creating method, color conversion definition creating apparatus, and color conversion definition creating program storage medium

Image processing method and apparatus, and cpu-readable recording medium

Ink use amount evaluation apparatus and method, and inkjet apparatus

Liquid ejection volume control apparatus and method, program and inkjet apparatus

Method for creating color profile