Michael G Chang

US Patent:

20130271775, Oct 17, 2013

Filed:

Apr 11, 2012

Appl. No.:

13/444599

Inventors:

Michael M. Chang - Redondo Beach CA, US

Assignee:

KYOCERA DOCUMENT SOLUTIONS INC. - Osaka

International Classification:

H04N 1/60
G06K 15/02

US Classification:

358 19

Abstract:

Methods and systems for accommodating color ranges are provided. A source light-to-dark dynamic range of a first output medium may be obtained with a source white point and a source black point. A destination light-to-dark dynamic range of a second output medium may be obtained with a destination white point and a destination black point. A white point mapping and a black point mapping may be determined. Based on a first representation of an image on the first output medium, a second representation of the image may be created by interpolating the source light-to-dark dynamic range to the destination light-to-dark dynamic range based on the white point mapping and the black point mapping. A computing device may cause the second output medium to produce the representation of the image.

US Patent:

20180302532, Oct 18, 2018

Filed:

Jun 26, 2018

Appl. No.:

16/018453

Inventors:

- Osaka, JP
Michael M. Chang - El Segundo CA, US
Dongpei Su - El Segundo CA, US
Kenneth A. Schmidt - El Segundo CA, US

International Classification:

H04N 1/40
H04N 1/00
H04N 1/32
H04N 1/405

Abstract:

An example embodiment may involve causing a page of a document to be printed on a printing device, wherein the printing device is in an AM halftoning mode and prints the page using an AM halftone; displaying, on the display unit, a graphical user interface, wherein the graphical user interface includes a selectable option to switch the printing device from the AM halftoning mode to an FM halftoning mode; receiving an indication that the selectable option has been selected; possibly in response to receiving the indication that the selectable option has been selected, causing the printing device to switch from the AM halftoning mode to the FM halftoning mode; and causing the page of the document to be printed again on the printing device, wherein the printing device is in the FM halftoning mode and prints the page using an FM halftone.

US Patent:

20180084151, Mar 22, 2018

Filed:

Aug 1, 2017

Appl. No.:

15/665706

Inventors:

- Osaka, JP
Michael M. Chang - El Segundo CA, US
Dongpei Su - El Segundo CA, US
Kenneth A. Schmidt - El Segundo CA, US

International Classification:

H04N 1/40
H04N 1/405
H04N 1/32
H04N 1/00

Abstract:

An example embodiment may involve causing a page of a document to be printed on a printing device, wherein the printing device is in an AM halftoning mode and prints the page using an AM halftone; displaying, on the display unit, a graphical user interface, wherein the graphical user interface includes a selectable option to switch the printing device from the AM halftoning mode to an FM halftoning mode; receiving an indication that the selectable option has been selected; possibly in response to receiving the indication that the selectable option has been selected, causing the printing device to switch from the AM halftoning mode to the FM halftoning mode; and causing the page of the document to be printed again on the printing device, wherein the printing device is in the FM halftoning mode and prints the page using an FM halftone.

US Patent:

20140268194, Sep 18, 2014

Filed:

Feb 14, 2014

Appl. No.:

14/180583

Inventors:

- Osaka, JP
Michael M. Chang - El Segundo CA, US

Assignee:

KYOCERA Document Solutions Inc. - Osaka

International Classification:

G06K 15/02

US Classification:

358 19

Abstract:

A method for determining a color profile from received raster data and printing the raster data is provided. Color profiles provide a mapping from a color space of the raster data to a color space of the printer, which typically uses CMYK toner or ink. A text color profile may be employed to print crisper text, or a photo color profile may be employed to produce better images. The raster data includes a plurality of raster scan lines containing digital pixel values. The method includes determining a number of sequentially repeated digital pixel values and a number of sequentially non-repeated digital pixel values for the plurality of raster scan lines. A color profile is selected based on a determination between the repeated and non-repeated digital pixel values. An example image forming apparatus that may carry out the method is also provided.

US Patent:

20140111830, Apr 24, 2014

Filed:

Oct 23, 2012

Appl. No.:

13/658111

Inventors:

- Osaka, JP
Kendrick Wong - El Segundo CA, US
Larry Lubman - El Segundo CA, US
Michael M. Chang - El Segundo CA, US
Stephen L. Schafer - El Segundo CA, US

Assignee:

KYOCERA DOCUMENTS SOLUTIONS, INC. - Osaka

International Classification:

H04N 1/405

US Classification:

358 306

Abstract:

Based on an m×n halftone matrix and an m×n pixel block of an image, an m×n halftone version of the m×n pixel block may be determined. An n-way interleave may be performed on rows of the m×n halftone version to create an mn×1 halftone segment. The mn×1 halftone segment may be compared to one or more halftone segments in a buffer. Based on the comparison, a literal code word and a representation of the mn×1 halftone segment may be output, and the representation of the mn×1 halftone segment may be written to the buffer. Alternatively, a repeat code word and a repeat value may be output, and at least one representation of the mn×1 halftone segment may be written to the buffer.

US Patent:

20140098387, Apr 10, 2014

Filed:

Oct 4, 2012

Appl. No.:

13/644969

Inventors:

Michael M. Chang - Redondo Beach CA, US

International Classification:

H04N 1/60
G09G 5/02

US Classification:

358 19, 345589

Abstract:

A method for creating a run-time color-conversion look-up table is provided. A conceptual representation of a slice of a color conversion object is presented. The color conversion object is defined by a color coordinate system having a neutral axis and a plurality of color axes. The slice is defined by a plurality of grid points on the color coordinate system that are in a common plane orthogonal to the neutral axis. In addition, the slice is bound along a plurality of faces of the color conversion object for which at least one of the plurality of color axes is at a minimum or maximum value. The method further includes applying design rules for certain grid points and determining outputs for other grid points. The outputs for the slice are stored in a portion of the look-up table. A tool for creating a 3D look-up table is also described.