Seiko Epson Corporation

Rochester Institute of Technology

Other

E.i. Dupont De Nemours and Company

Roy Stephen Berns

Lawrence A Taplin

Yoshifumi Arai

Takashi Ito

Kimito Katsuyama

Michinao Osawa

Tony Z Liang

Jennifer D T Kruschwitz

Masayoshi Shimizu

Francisco Hideki Imai

A spectrally selective (e.g., color) target has been designed and fabricated for reflectance micro- and/or macro-imaging that utilizes microlens arrays and color mirrors. The color mirrors are optical interference coatings. The microlenses are designed and fabricated such that the light reflected from the color mirror is incident onto the detector. This system of microlenses and color mirrors allows the user to image different colored specular highlights. An infinite number of spectral reflectance profiles can be created with these color targets and used for spectral and colorimetric imaging applications. The targets are not limited to the visible region; they can also be designed to work in the ultraviolet and infrared wavelength regions.

Spectral target for macroscopic and microscopic reflectance imaging

In one example, there is designed a system for calculating an evaluation index for sample ink amount data from a color difference evaluation index and an image quality evaluation index, and creating a profile based on a highly rated sample. In this system, the printer driver is designed to use different indexes to create plural profiles, and to perform color conversion using these plural profiles. These plural profiles may be selected appropriately according to user needs, printing conditions, type of image targeted for printing, and the like.

Production of color conversion profile for printing

A spectral printing model converter is used to convert ink amount data to spectral reflectance of a color patch to be printed according to the ink amount data. A plurality of sample ink amount data each representing a set of ink amounts of plural inks is provided, and each sample ink amount data is converted into spectral reflectance of a virtual sample patch to be printed with the ink amounts represented by the sample ink amount data using the spectral printing model converter. An evaluation index is calculated for each sample ink amount data, where the evaluation index includes a color difference index and an image quality index of the virtual sample patch to be printed according to the sample ink amount data. The color difference index represents a color difference between a sample color which is calculated from the spectral reflectance and a comparative color which is selected as a basis for comparison. Plural sample ink amount data is then selected based on the evaluation index, and a profile defining correspondence between colorimetric value data and ink amount data is produced based on the selected plural sample ink amount data.

A method and apparatus for producing a color conversion profile for use in a color inkjet printer, a color laser printer, or the like. In one embodiment, a spectral printing model converter is used to sample ink amount data to spectral reflectance Rsmp(&#x3bb;). Using this spectral reflectance Rsmp(&#x3bb;), colorimetric values CV, CVunder two different viewing conditions are calculated, and an evaluation index EI that includes an index of color difference between the colorimetric values CV, CVis calculated. I another embodiment, an evaluation index EI that includes an index of color difference between sample color represented by sample ink amount data and reference color obtained from a reference color patch is calculated. Sample ink amount data having the best evaluation index EI is then selected as a representative sample. Profiles are created from the plurality of selected representative samples.

Production of a color conversion profile utilizing comparison of spectral reflectance data and comparative colors

A system and method for multi-spectral image capture of a first scene includes acquiring a first series of images of the first scene with one or more image acquisition systems and filtering each of the first series of images of the scene with a different non-interference filter, illuminating each image of the first series of images with a different illuminant, or acquiring each of the images of the first series of images with a different image acquisition system. Each of the image acquisition systems has at least one color channel, each of the non-interference filters has a different spectral transmittance, and each of the illuminants has a different spectral power distribution.

System and method for scene image acquisition and spectral estimation using a wide-band multi-channel image capture

The present invention provides a method to fully utilize the spectral gamut of a six-color printer to minimize metameric matches while maintaining high colorimetric accuracy in the reproduction by such six-color printer of a target image from a target color device.

Spectral color reproduction with six color output

A method, apparatus and computer-readable medium allows users to measure a lighting condition of an object. In one embodiment, at least one user visually compares colored materials against a displayed color sample. Users may adjust the color of the displayed color sample by changing corresponding attribute values until the displayed color sample appears to substantially match the colored material. Once users indicate that they have established a color match between a displayed color sample and a colored material, the spectral irradiance value of the substantially matched color sample is calculated. The spectral irradiance value represents a measurement of the lighting condition in a particular room.

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Pittsford, NY, United States of America

Roy Stephen Berns