Abstract:
A method for characterising a colour device (401). A first transform (305) is calculated (304) from first input colours (302) and first output colours (303) measured (301) by an optical instrument (403). An intermediate set of output colour values (306) is obtained and transformed (307), using the transform (305), into a second set of input colour values (308), which are used to obtain (309) a second set of output colour values (310). The second sets of input and output colour values (308, 310) are used to calculate (311) a second transform (312). By a judicious choice of intermediate output colour values, e.g. in the Lab colour space, it is possible to obtain a transform that is extra accurate for colours for which the eye is especially sensible. Also provided are a system and a device.
Abstract:
A device and method of the invention relates to picture tone control of a printer and enables confirmation of tone before printing, thereby preventing print failure and reducing waste paper. The device profile of a printer used for printing is acquired, the device profile of a simulation printing tool is acquired, and plate-making data is acquired. Halftone dot area ratio data k, c, m, y of the plate-making data is converted into color coordinates (L*a*b*) by using the printer device profile. The concentrations R, G, B corresponding to the color coordinate (L*a*b*) converted by using the device profile of the simulation printing tool is outputted and the outputted tone is judged to be or not within an allowable range. On the basis of the result of the judgment, picture tone is controlled for a plate-making machine and a printer.
Abstract translation:本发明的装置和方法涉及打印机的图像色调控制,并且能够在打印之前确认色调,从而防止打印故障并减少废纸。 获取用于打印的打印机的设备配置文件,获取模拟打印工具的设备配置文件,并获取制版数据。 制版数据的半色调点面积比数据k,c,m,y通过使用打印机设备简档被转换成颜色坐标(L * a * b *)。 输出与通过使用模拟打印工具的装置轮廓转换的颜色坐标(L * a * b *)对应的浓度R,G,B,并将输出的音调判定为或不在容许范围内。 基于判断结果,对制版机和打印机控制图像色调。
Abstract:
An apparatus for analyzing a sample hair mixture having a mixture of two hair colors and an overall spectrum representative of the two colors, comprising:a first color selector, configured to select a first spectrum representative of a first color in the hair mixture from a first group of at least one spectrum, and an iterative spectrum combiner, associated with the first color selector and configured to iteratively combine therewith a second spectrum representative of a second color in the hair mixture from a second group of spectra over the first spectrum, thereby to find an optimal combination of first and second spectrum which is a closest match to the overall spectrum. 33
Abstract:
The present invention relates to a device for analysing the colour of a unhomogeneous material ( C ) , utilizable for example for analysing the hair colour of an individual. The device includes : at least an illumination source ( 1 ) for illuminating the above sample of a unhomogeneous material ( C ), a display structure ( 2 ) for exposing the sample of a unhomogeneous material ( C ) to the radiation emitted from the illumination source ( 1 ), detection means ( 3 ) for the digital acquisition of the image of the sample ( C ) illuminated from the illumination source ( 1 ) , and processing means ( 4 ) for transforming the digital acquisition readings of the image of said detection means ( 3 ) in coordinates comparable with the perception of the human eye.
Abstract:
A distributed color selection and coordination system including a remote computer communicatively coupled to a server. The remote computer configured to select a starting color and access a database in the server to find one or more complementary colors. The colors in the database arranged in a predetermined relationship with other colors in the database, the relationship between colors based on color theory. The remote computer being capable of storing personal information and color selections on the server. An in-store kiosk is communicatively coupled to the server and configured to execute color selection and coordination software. The in-store kiosk being capable of retrieving stored personal information and color selections from the server which was previously stored from the remote computer.
Abstract:
Methods for generating a customized spectral profile, which can be used to generate a corresponding filter, lamp or other type of illuminant. A trial spectrum is generated. A reference spectrum is determined or otherwise obtained. A SOURCE spectrum is determined or otherwise obtained. One or more optical indices are calculated using the trial spectrum and one or more of the optical indices are optimized by varying the trial spectrum to generate the customized spectral profile. A radiation force parameter can be used to minimize unsafe build-up of light in spectral regions. Adaptations of color rendering parameters can be used in the optimization process. Smoothing parameters can be used to enable easier design of filter structures. A reflectance camera can be used to measure reflectance data at one or more pixels of a digital representation of an object to be illuminated.
Abstract:
Ce scanner comprend un capteur linéaire photosensible intégré (20) comprenant N lignes parallèles de photosites, avec N ≥ 4, de préférence N ≥ 6, et pour chaque ligne de photosites un filtre optique passe-bande associé. Pour chaque pas de balayage et pour chaque pixel de la ligne analysée, il délivre N valeurs de mesure partielles quantifiées correspondantes, représentatives chacune de la réflectance spectrale du document recueillie au travers de l'un des N filtres respectifs. Des moyens de reconstruction spectrale opèrent selon une méthode d'extrapolation avec apprentissage à partir d'échantillons colorés de référence, avec une mémoire (42) stockant une base de connaissances formée à partir des valeurs de réflectance spectrale connues desdits échantillons de référence, et un réseau de neurones (40) recevant en entrée les N valeurs partielles quantifiées et délivrant en sortie au moins une valeur quantifiée reconstituée, représentative de la réflectance spectrale du pixel correspondant du document.
Abstract:
A method for non-orthogonal prognostic monitoring of a system or process wherein: a plurality of signals corresponding to different system parameters are identified and a plot established of signal magnitude against signal parameter to form an effective magnitude parameter spectrum; and the, magnitude parameter spectrum is addressed by a plurality of non-orthogonal filters whose outputs are converted algorithmically into primary chromatic parameters.
Abstract:
Systems and methods for providing spectral measurements are described. In one embodiment, a spectral measuring device (100) comprises at least one radiation source configured to provide N (N >= 2) linearly independent illuminant sources (220) characterized by M (M >= N) wavelength channels in a predetermined wavelength range; a sensor unit (240) including at least one sensor, configured to be in optical communication with the radiation sources (220) and an object (280); a memory (124) storing an illuminant characterization matrix including spectral characteristics of the N illuminant sources (220) in the M wavelength channels; and a processor (122) configured to provide spectral responses of the object in the M wavelength channels, based at least in part on the illuminant characterization matrix. The embodiments of the invention can be used to construct a new class of compact spectral measuring devices, such as handheld color measuring devices.
Abstract:
A system for calibrating a spectrophotometer includes a spectrophotometer (10) including a network communication interface (12), operating in a plurality of modes and producing and implementing diagnostic information. A network communicates with the spectrophotometer (10) via the network communication interface (12). A remote processor (22) is enabled to communicate with the spectrophotometer (10) directly via the network communication interface (12). Alternatively, a spectrophotometer having a thin client is disclosed that can operate independently of a local PC.