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.

A photometric device (1) measuring light emitted from a measuring object such as a display (2) includes two types of filters including interference filters (20X, 20Y, and 20Z) and an LVF (21), a disk (22) supporting the interference filters and the LVF, a motor (23) rotatably drive the disk to cause the light emitted from the measuring object to scan the interference filters and the LVF sequentially, a photoreceptor (13) converting light passed through the interference filters and light passed through the LVF to an electrical signal, a photometric controller (14) outputting photometric information based on the electrical signal of the light passed through the interference filters and converted by the photoreceptor and the electrical signal of the light passed through the LVF and converted by the photoreceptor.

A spectral colorimetric apparatus comprises a light source, a spectral element, a light receiving element, a substrate on which the light receiving element is mounted, a housing and a pressing portion. The housing has a first side wall on which the substrate is fixed and a second side wall on which the spectral element is fixed. The pressing portion pinches the spectral element together with the second side wall and presses the spectral element to the second side wall.

A photometric device (1) measuring light emitted from a measuring object such as a display (2) includes interference filters (20X, 20Y, and 20Z) selectively transmitting a particular wavelength corresponding to a respective one of tristimulus values, an LVF (21) separating and transmitting incident light, a disk (22) supporting the interference filters and the LVF, a motor (23) rotatably drive the disk to cause the light emitted from the measuring object to scan the interference filters and the LVF sequentially, a photoreceptor (13) converting light passed through the interference filters and light passed through the LVF to an electrical signal, and a photometric controller (14) outputting photometric information based on the electrical signal of the light passed through the interference filters and converted by the photoreceptor and the electrical signal of the light passed through the LVF and converted by the photoreceptor.

A camera system includes: a database which stores a plurality of stereoscopic color profiles, in which conversion relationships calculated from second image data obtained by photographing a plurality of reference color stereoscopic objects assigned with reference colorimetric values in advance and the reference colorimetric values corresponding to the second image data are associated with a plurality of illumination conditions in photographing; a selection unit which, based on an illumination condition at the time of photographing of a stereoscopic subject, selects a stereoscopic color profile corresponding to the illumination condition; and a color conversion unit which performs color conversion from first image data of a photographed image of the stereoscopic subject to colorimetric values, based on the selected stereoscopic color profile.

A calibration device for calibrating output of a display device includes a light source, an integrating sphere, a filter, a narrowband instrument, a wideband instrument, and a data processing unit. The light rays emitted by the light source passing through the filter and enter the integrating sphere. The narrowband instrument and the wideband instrument are configured to measure the color measured data. The data processing unit is configured to receive the color measured data to generate a calibration matrix based on the color measured. The calibration matrix is used to calibrate the output from the wideband instrument.

The present invitation relates to an optical radiation measurement method based on light filter units, comprising the steps of: 1) providing characteristic filter units and correction light filter units in front of detection units to obtain multiple measured response values of an object to be detected; and, 2) selecting one or more sampling regions within a waveband to be detected, and calculating, according to a corresponding simultaneous expression/equation system of the measured response values, a spectral power distribution within the waveband to be detected. In this method, by introducing a small number of correction light filter units, the spectral power distribution within the entire waveband to be detected can be obtained without using a large number of narrow waveband color filters. In addition, a light radiation measurement apparatus is disclosed.

A system, device, and method for managing colors of a color printer by printing color patches on a test sheet of paper associated with a paper type, determining spectral data of the color patches using an inline full width array spectrophotometer of the color printer, determining measurements based on the spectral data, determining that a measurement is equal to or within a range of a measurement associated with an existing paper profile; and printing subsequent sheets of paper associated with the paper type using parameters associated with the existing paper profile.

Systems, devices, and methods illuminate one or more areas on a calibration medium from a first side of the calibration medium with one or more respective light-emitting regions of a light source; detect light transmitted through the calibration medium at the one or more areas, thereby obtaining calibration-measurement information for at least one of the one or more light-emitting regions; illuminate one or more color patches on a color-measurement medium from a first side of the color-measurement medium with the one or more respective light-emitting regions of the light source; detect light transmitted through the one or more color patches printed on the color-measurement medium, thereby obtaining color-measurement information for at least one of the one or more light-emitting regions; and generate one or more transmissive measurements based on the calibration-measurement information and the color-measurement information.

A color chart detection apparatus that detects a color chart from an image representing the color chart having a plurality of palettes arranged in a predefined order is provided. The color chart detection apparatus: extracts any pixel having a color component corresponding to each designated one of a predetermined number of palettes; selects at least three palettes to form a first group and, when a combination of pixels selected on a palette-by-palette basis from among the pixels extracted for the respective palettes included in the first group is arranged in the predefined order, detects each of the pixels included in the combination as being a candidate pixel; and based on the candidate pixel, computes color information representing color of the palette corresponding to the candidate pixel on the image and position information representing position of the corresponding palette on the image.