Abstract: A color conversion table creation device includes an image reading unit, a first color conversion unit color-converting read image data using a first color conversion table indicating a correspondence relationship between signal values obtained by the image reading unit and chromaticity values, a second color conversion unit color-converting document image data into print image data using an input and output color conversion tables, an image association unit performing an association process for a positional relationship between each piece of read image data of a printed matter obtained according to print image data and a target printed matter or each piece of read chromaticity value image data converted into chromaticity values and the document image data, and a color conversion table creation unit creating a color conversion table to be used in the second color conversion table based on differences between chromaticity values of the target printed matter and printed matter.

Abstract: Disclosed are a threshold value data setting device, method, and program and an image forming system capable of, even if the number of types of printing devices and printing materials is enormous, simply and easily determining threshold value data suitable for any combination thereof. A change in dot shape occurring in an image forming process from the creation of a binary image signal 46 to the formation of an image is acquired as response characteristics data 112 in a spatial frequency domain. The response characteristics data 112 is applied to create a simulated image signal in which the change in dot shape is reproduced in a simulated manner. Threshold value data 44 to be set is determined from among threshold value candidates by a comparison and/or evaluation based on quantitative values calculated by executing predetermined evaluation processing for the simulated image signal.

Abstract: Disclosed are a threshold value data setting device, method, and program and an image forming system capable of, even if the number of types of printing devices and printing materials is enormous, simply and easily determining threshold value data suitable for any combination thereof. A change in dot shape occurring in an image forming process from the creation of a binary image signal 46 to the formation of an image is acquired as response characteristics data 112 in a spatial frequency domain. The response characteristics data 112 is applied to create a simulated image signal in which the change in dot shape is reproduced in a simulated manner. Threshold value data 44 to be set is determined from among threshold value candidates by a comparison and/or evaluation based on quantitative values calculated by executing predetermined evaluation processing for the simulated image signal.

Abstract: A printed color prediction method includes: a step of acquiring the spectral reflectance in a protective film non-coating region of a printed matter that the protective film does not coat; a step of estimating the optical physical property value of the protective film; a step of acquiring the spectral distribution of an observation light source; a step of estimating the color change property due to the interaction between the printed matter as a base matter and the protective film; and a step of predicting the colorimetric value of a protective film-attached printed matter, based on the acquired spectral reflectance of the printed matter, the optical physical property value of the protective film, the spectral distribution of the observation light source and the color change property due to the interaction.

Abstract: A vibration damping device in which a covering member can be fixed firmly to a rotary member by a rivet is provided. In the vibration damping device, a pendulum mass 14 is held in a rotary member 15, and a casing 17 is fixed to the rotary member 15 by a rivet 20. The rivet 20 comprises a head 20a, a first shaft 20b and a second shaft 20c. The first shaft 20a penetrates through a first casing member 18, the rotary member 15 and the second casing member 19, and a tail thereof is expanded to fasten those members. The second shaft 20c penetrates through a driven member, and a tail thereof is expanded to fasten the driven member to the rotary member 15.

Abstract: First spectral data (spectral transmittance) of a printed object, and second spectral data (spectral reflectance) of the printed object are obtained. Further, third spectral data (spectral radiance distribution) of a transmissive light source, and fourth spectral data (spectral radiance distribution) of a reflective light source are obtained. Then, using the first, second, third and fourth spectral data, colorimetric value data of the printed object in a given observational environment is calculated.

Abstract: A color separation apparatus comprising: a target value acquisition device; a dot threshold data acquisition device which acquires dot threshold data including information on a threshold for each of the dots for converting the continuous-tone image data into binary image data for each of the color materials; a print profile acquisition device which acquires a print profile showing correspondence between a device signal value and a value of a color system in the printer; and a color separation device which allows the printer to calculate candidates of the device signal value on the basis of the target values of colors acquired by the target value acquisition device and the print profile, and determines a device signal value for reproducing colors corresponding to the target values from among the candidates of the device signal value on the basis of the dot threshold data and the print profile.

Abstract: A color separation apparatus comprising: a target value acquisition device; a dot threshold data candidate selection device; a print profile acquisition device which acquires a print profile showing correspondence between device signal values and color system values in the printer for each of the candidates of dot threshold data; and a color separation device which allows the printer to calculate candidates of the device signal values on the basis of the target values of colors acquired by the target value acquisition device and the print profile, and determines dot threshold data for reproducing colors corresponding to the target values on the basis of the candidates of dot threshold data and the print profile from among the candidates of dot threshold data, as well as determines device signal values for reproducing colors corresponding to the target values from among the candidates of device signal values.

Abstract: A color separation apparatus comprising: a target value acquisition device; a dot threshold data acquisition device which acquires dot threshold data including information on a threshold for each of the dots for converting the continuous-tone image data into binary image data for each of the color materials; a print profile acquisition device which acquires a print profile showing correspondence between a device signal value and a value of a color system in the printer; and a color separation device which allows the printer to calculate candidates of the device signal value on the basis of the target values of colors acquired by the target value acquisition device and the print profile, and determines a device signal value for reproducing colors corresponding to the target values from among the candidates of the device signal value on the basis of the dot threshold data and the print profile.

Abstract: A color separation apparatus comprising: a target value acquisition device; a dot threshold data candidate selection device; a print profile acquisition device which acquires a print profile showing correspondence between device signal values and color system values in the printer for each of the candidates of dot threshold data; and a color separation device which allows the printer to calculate candidates of the device signal values on the basis of the target values of colors acquired by the target value acquisition device and the print profile, and determines dot threshold data for reproducing colors corresponding to the target values on the basis of the candidates of dot threshold data and the print profile from among the candidates of dot threshold data, as well as determines device signal values for reproducing colors corresponding to the target values from among the candidates of device signal values.

Abstract: A torsional vibration damping device that can ensure a space for allowing a mass body to make reciprocating movements and can improve the vibration damping performance is provided. A torsional vibration damping device in which a mass body is attached to a rotating body by two support pins includes two first hollow portions which are formed in the rotating body at positions corresponding to the respective support pins and into which the respective support pins are inserted, and two second hollow portions which are formed in the mass body at positions opposed to the respective first hollow portions and into which the respective support pins are inserted. Outer sides of inner peripheral edges of the respective first hollow portions in a radial direction of the rotating body serve as guide faces. Inner sides of inner peripheral edges of the respective second hollow portions in the radial direction of the rotating body serve as attachment faces.

Abstract: A cell interior point group of a first lattice is determined by determining at least one interior point for each of cells defined based on the first lattice points. Colorimetric values for device values of second lattice points are predicted based on device values and colorimetric values corresponding to the first lattice points, as well as device values and colorimetric values corresponding to the cell interior point group.

Abstract: A print color predicting apparatus, a print color predicting method, and a recording medium having a program recorded therein acquire a spectral reflectance of a print, estimate a plurality of sets of optical property values of a protective film that covers the print, depending on the spectral reflectance of the print, and predict a spectral reflectance of a protective-film-covered print, using the spectral reflectance of the print and the sets of optical property values of the protective film.

Abstract: First spectral data (spectral transmittance) of a printed object, and second spectral data (spectral reflectance) of the printed object are obtained. Further, third spectral data (spectral radiance distribution) of a transmissive light source, and fourth spectral data (spectral radiance distribution) of a reflective light source are obtained. Then, using the first, second, third and fourth spectral data, colorimetric value data of the printed object in a given observational environment is calculated.

Abstract: A first profile corresponding to a first print is generated based on first spectral data of a first print and third spectral data of a light source, which serves as an observational light source for the first print. A second profile corresponding to a second protective-film-covered print is generated based on spectral data of a second print, second spectral data of a second laminating film, and third spectral data of a light source, which serves as an observational light source for the second protective-film-covered print. Using the first profile as an input profile and the second profile as an output profile, colors of image data representing an image of the first print are converted into colors of image data representing an image of the second print.

Abstract: A standard density print profile capable of producing a print of standard densities is generated by a printing press set to standard density conditions, and a designated density print profile capable of producing a print of designated densities is generated by the printing press when the printing press is set to designated density conditions. A color conversion table capable of producing the print of the designated densities with the printing press set to the standard density conditions is generated using the standard density print profile and the designated density print profile. The colors of the image data are converted using the color conversion table.

Abstract: First spectral data (spectral transmittance) of a printed object, and second spectral data (spectral reflectance) of the printed object are obtained. Further, third spectral data (spectral radiance distribution) of a transmissive light source, and fourth spectral data (spectral radiance distribution) of a reflective light source are obtained. Then, using the first, second, third and fourth spectral data, colorimetric value data of the printed object in a given observational environment is calculated.

Abstract: First spectral data (spectral reflectance) of a printed object is obtained, and second spectral data (optical material characteristic value) of a laminating film is estimated. Then, using the first spectral data and the second spectral data, fourth spectral data (spectral reflectance) is predicted.

Abstract: A method and a system for predicting print colors are provided. A profile generator determines standard density spectral reflectances of a color chart printed under standard density conditions, first changed density spectral reflectances of a color chart printed with only the density of one of colors C, M, Y, K being changed by a given amount, and second changed density spectral reflectances of a color chart printed with the densities of the colors C, M, Y, K being changed by the same amount. The profile generator generates a print predicting profile for obtaining desired target densities, using the standard density spectral reflectances, the differences between the standard density spectral reflectances and the first changed density spectral reflectances, and corrective coefficients for obtaining the second changed density spectral reflectances, and predicts highly accurately colors of the print where the density of a desired color is changed, using the print predicting profile.

Abstract: In a method of and a system for predicting print colors, a profile generator corrects the standard spectral reflectances of a color chart printed under standard density conditions and the differences between the spectral reflectances of color charts for the respective colors in which the density of one of the colors C, M, Y, K is changed to a changed density setting value and the densities of the other colors are fixed to standard density setting values, using density differences with the standard density setting values which are calculated by a monochromatic solid density calculator. The profile generator then generates a print predicting profile for desired target densities based on the corrected corrective standard spectral reflectances and the spectral reflectance differences, and highly accurately predicts the colors of a print using the print predicting profile when the densities of desired ones of the colors are changed.