Todd D Newman

US Patent:

6603483, Aug 5, 2003

Filed:

Nov 15, 1999

Appl. No.:

09/440463

Inventors:

Todd D. Newman - Palo Alto CA

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G09G 502

US Classification:

345593, 345594

Abstract:

The generation of a color transformation sequence comprised of transform steps, wherein the color transformation sequence is for transforming color image data. At least one reference to a color profile or a gamut mapping algorithm is received, and at least one transform step is generated based on the at least one reference, wherein the at least one transform step is a profile step or a gamut-mapping step. The at least one transform step is included in the color transformation sequence.

US Patent:

6633668, Oct 14, 2003

Filed:

Jul 12, 1999

Appl. No.:

09/352169

Inventors:

Todd Newman - Palo Alto CA

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06K 900

US Classification:

382166, 358523, 358539

Abstract:

The management of color image data, said color image data provided in a source device color space from a source device having a source device color profile, wherein the source device color profile is accessed and used to transform the color image data from the source device color space to a color space that is both device and viewing condition independent, thereby creating device-independent color image data, after which the device-independent color image data is compressed. The compressed, device independent color image data can then be accessed for decompression and color management prior to output on a destination device.

US Patent:

6704442, Mar 9, 2004

Filed:

Nov 15, 1999

Appl. No.:

09/440065

Inventors:

John S. Haikin - Fremont CA
Todd D. Newman - Palo Alto CA

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06K 900

US Classification:

382162, 382276

Abstract:

A color management system that transforms input image data from an input colorant space to an output colorant space using input and output device appearance transforms and a customizable gamut mapping algorithm. The gamut mapping algorithm is customizable based on the color management session in question, and in particular may be customizable based on the content of the image data, based on a comparison between input device appearance transforms and output device appearance transforms, or based on viewing conditions, output conditions or print media involved. According to the invention, the customizable gamut mapping algorithm is customized based on the current color management session, and the customized gamut mapping algorithm is composited with the input device appearance transform and/or the output device appearance transform thereby yielding one or more transformations that can be applied to the input image data more efficiently than if the transformations (including the gamut mapping algorithm) were applied individually.

US Patent:

6795084, Sep 21, 2004

Filed:

Jan 2, 2002

Appl. No.:

10/032500

Inventors:

Todd Newman - Palo Alto CA

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G09G 502

US Classification:

345589, 345690, 345102, 345 88, 358 19, 358500

Abstract:

Color reproduction method in a computerized image forming apparatus, which comprises performing heuristic analysis of the configuration of the apparatus in order to infer color environment of the apparatus, and automatically setting color reproduction parameters of the computerized image forming apparatus based on the color environment of the apparatus. The color environment includes color perceptions and color preferences of the user of the apparatus as well as the viewing condition at the apparatus. The configuration of the apparatus may include the type and class of user installed software, language setting of the user interface, and the time zone setting. The user has the option of overriding the heuristically determined factors by manually entering them through a user interface.

US Patent:

6919975, Jul 19, 2005

Filed:

Jul 26, 1999

Appl. No.:

09/360449

Inventors:

John S. Haikin - Fremont CA, US
Todd D. Newman - Palo Alto CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G03F003/08
G06K015/00
G06F015/00

US Classification:

358518, 358 19, 358 115

Abstract:

Creation of a reverse look-up table from a forward look-up table for a color device. Indexes to the forward look-up table span all possible color stimulus values for the color device in a device dependent color space. Outputs from the forward look-up table span a color gamut of corresponding color response values for the color device in a device independent appearance color space. The reverse look-up table maps a color response value in the device independent appearance color space to a color stimulus value in the device dependent color space. Indexes to the reverse look-up table span beyond the color gamut of color response values for the color device, and outputs from the reverse look-up table span beyond all possible color stimulus values for the color device. According to the invention, a first portion of the reverse look-up table, in which indexes fall within the color gamut, is populated by search and interpolation in the forward look-up table for color stimulus values corresponding to color response values of the indexes to the first portion of the reverse look-up table. A second portion of the reverse look-up table, in which indexes fall outside of the color gamut, is populated by extrapolation from extrapolation color stimulus values.

US Patent:

6947589, Sep 20, 2005

Filed:

Sep 20, 2001

Appl. No.:

09/956040

Inventors:

Todd D. Newman - Palo Alto CA, US
Timothy L. Kohler - San Jose CA, US
John S. Haikin - Fremont CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06K009/00

US Classification:

382162, 382167, 382176, 382190, 345590, 345589

Abstract:

The present invention is directed to a mechanism of dynamically selecting a gamut mapping component for use in a color management system which transforms colors specified in image data from a first color space to a second color space, the method comprising automatically generating prediction information for use in selecting from a plurality of gamut mapping components, wherein the prediction information is based on determined gamut mapping preferences corresponding to at least one characteristic of the image data, and automatically selecting at least one of the plurality of gamut mapping components based on the prediction information.

US Patent:

7024055, Apr 4, 2006

Filed:

Jan 2, 2002

Appl. No.:

10/032488

Inventors:

Todd Newman - Palo Alto CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06K 9/60
G06K 9/00

US Classification:

382305, 382162

Abstract:

Data storage format for storing images with extended color gamut that is compatible with limited color gamut imaging devices includes identifying regions within the color image that contain extended gamut color values, using a compact notation to store an identification of each extended color gamut region in a second section, gamut-mapping the image data pertaining to the extended gamut regions to a limited gamut color space, storing the gamut-mapped image data together with all image data not in an extended gamut region in a first section of the data storage format, and storing image data for the extended gamut regions in an extended gamut color space in a third section of the data storage format such that the limited color gamut image stored in the first section can be combined with the extended gamut data stored in the third section to produce an extended color gamut digital image.

US Patent:

7053910, May 30, 2006

Filed:

Jul 30, 2001

Appl. No.:

09/916436

Inventors:

Todd D. Newman - Palo Alto CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G09G 5/02

US Classification:

345604, 382167

Abstract:

A metamerism-reducing color transformation in which a color value in a perceptual color space is mapped to a corresponding color value in a device dependent color space. Multiple different inverse transforms are applied to the color value in the perceptual color space, one each for respective ones of multiple different viewing conditions such as different viewing illuminants or different surround, thereby resulting in plural different target color values in a viewing condition dependent space. The plural different target color values in the viewing condition dependent space are subjected to regression analysis based on a spectral model of reflectance of device colors so as to calculate to a single color coordinate in device dependent coordinates that best fits the plural different target color values in the viewing condition dependent space. The regression analysis may be a weighted regression analysis. Because the color value in the destination device dependent color space is obtained through best-fit regression analysis of plural different target color values corresponding to multiple different viewing conditions, metameric shifts in the color's appearance due to changes in viewing condition are significantly reduced as compared to transformations which obtain values accurate only for a single viewing condition.