An image processing portion of an image reading apparatus includes an extraction portion that extracts color information, a management portion that manages management color information that is an estimated value of the color information based on a control signal, a determination portion that determines whether or not the color information matches the management color information, and a writing control portion that causes the storage portion to store the pixel data when it is determined that the color information matches the management color information and that does not cause the storage portion to store the pixel data when it is determined that the color information does not match the management color information. When the color information does not match the management color information, the management portion adjusts the management color information to match the color information.

An information processing apparatus includes circuitry. The circuitry acquires a first state parameter indicative of a state of a printer engine of an image forming apparatus. The circuitry performs comparison between the first state parameter acquired and each of second state parameters registered in a memory in advance and indicative of states of the printer engine of the image forming apparatus at creation of a plurality of color profiles. The circuitry searches for a color profile corresponding to a second state parameter closest to the first state parameter from among the second state parameters.

Color conversion attempt to reproduce an input CMYK combination on a print media using an output CMYK combination. In a 2-step process, ICC profiles are used for the color conversion. In some instances, a 1-step process may be used that avoids the use of the ICC profiles and provides a faster processing time. A color progression checker determines whether the 1-step process may be used for color conversions based on standard deviations of the colorants along paths within a three-dimensional look-up table for a destination ICC profile. If a certain number of standard deviations exceed 20%, then the 1-step process for color conversion may not be effective.

A color verification optimization program causes a computer to execute a process including steps of, when a plurality of color conversion patterns are extracted, determining whether one color conversion profile and another color conversion profile coincide with or approximate to each other by comparing color saturation values which are estimated with respect to color conversion profiles, determining whether one color correction table and another color correction table coincide with or approximate to each other by comparing color saturation values which are estimated with respect to color correction tables, and performing control to perform verification on one color conversion pattern in two or more color conversion patterns of which the color conversion profiles and the color correction tables both coincide with or approximate to each other and omit the verification with respect to a remaining color conversion pattern.

Provided is a change degree deriving device including a receiving unit that receives an image obtained by capturing an object and a known color body including plural color samples, the plural color samples including deterioration-series colors among colors used for the object, and each of the color samples having a known colorimetric value, a conversion rule generating unit that generates a conversion rule used to convert a color of the image received by the receiving unit into a colorimetric value in a device-independent color space based on the color samples included in the image received by the receiving unit, and a converting unit that converts a color of the object included in the image received by the receiving unit into a colorimetric value in the device-independent color space according to the conversion rule.

Techniques to improve operation of an augmented reality device and/or system utilizing fiducial markers and/or colorspace conversions are provided. In various embodiments, one or more fiducial markers in an environment associated with the augmented reality device are updated and optimized in relation to environmental changes utilizing one or more color-space conversion techniques. Other embodiments are described and claimed.

A method monitors a color standard for a machine for processing printing material. The color standard results from various parameters of the printing operation and correspondingly associated set points. The color standard may be modified and individually adapted to every machine. The machine is equipped such that current values of the parameters of the color standard are measured and forwarded to a computer. The computer compares these values and predefined set points of the color standard, and based on this information, makes an assessment of the color and quality level achieved in the printing operation. The computer outputs control signals based on the monitoring. The control signals influence the machine control and/or the determining of the current values of the parameters of the color standard in a feedback loop. The color standard is modifiable by the operator by a different selection and weighting of the parameters and the set points.

An image reading apparatus reads an image on a document surface. The image reading apparatus includes a document-supporting unit, a light source, and an image reading unit. The document-supporting unit supports the document and transmits light. The light source, from a direction inclined with respect to a line perpendicular to the document surface, irradiates the document surface with an irradiation beam transmitted through the document-supporting unit. The image reading unit reads the image in accordance with light reflected from the document surface and thereby generates image data. The document-supporting unit enables varying degree that the irradiation beam scatters in passing through the document-supporting unit.

An example color resource is generated. A source color from a first color space is converted to a corresponding greyscale color in a greyscale color space. The greyscale color includes a first luminosity amount. A black channel amount is adjusted to a depletion color from a second color space to form a target color in the second color space. The depletion color corresponds with a transformation of the source color into the second color space. The depletion color includes a second luminosity amount, and adjusting the black channel includes matching the second luminosity amount in the target color with the first luminosity amount.

An estimated image data calculator is configured to calculate, as estimated image data, for each of image data of respective colors outputted from an imaging element, on the basis of a pixel value of a first pixel on one of two lines adjacent to each other in the image data, and a pixel value of a second pixel on the other of the two lines and adjacent to the first pixel, image data of a non-reading region between a reading region in a document corresponding to the one of the two lines and a reading region in the document corresponding to the other of the two lines. A pixel value correcting unit is configured to correct at least one of the pixel value of the first pixel and the pixel value of the second pixel on the basis of the estimated image data.