Patents by Inventor John Charles Dalrymple
John Charles Dalrymple has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8400692Abstract: Systems and methods for utilizing metadata embedded in a color measurement target to uniquely identify the target through color measurement. A color measurement target is used for color calibration, color characterization, color adjustment and/or color correction of a color output device and includes a collection of color patches imaged by the output device, wherein metadata is embedded directly into the color patches of the color measurement target to uniquely identify the target through color measurement. The metadata-bearing patches in the target are used to communicate information through color measurement, and can contribute to the color characterization.Type: GrantFiled: May 19, 2009Date of Patent: March 19, 2013Assignee: Sharp Laboratories of America, Inc.Inventors: John Charles Dalrymple, James Zhixin Chang
-
Patent number: 8310716Abstract: A method for designing a black generation transfer curve is described. A table is produced to convert a first signal in a first signal space to a second signal in a second signal space. Color measurement data of a device is obtained. The color measurement data relates to a signal-to-color response of the device. A black generation transfer curve is designed constrained by the color measurement data of the device.Type: GrantFiled: December 5, 2007Date of Patent: November 13, 2012Assignee: Sharp Laboratories of America, Inc.Inventors: James Zhixin Chang, John Charles Dalrymple
-
Patent number: 7847974Abstract: Systems and methods for dynamically limiting total colorant coverage in multi-colorant rendering. Two polyhedra are defined: one contains all the colors that exceed the total colorant limit, and another is within the colorant limit that contains the results of the colorant limitation process. Data is received to identify a specified contone color, which is processed to decide whether it is inside one of the polyhedra. If the specified contone color is not within either polyhedra, the specified contone color is used in the rendering process. Alternatively, if the specified contone color is within one of the polyhedra, the value representing the specified contone color is compressed into the second polyhedra volume to obtain a resultant contone color that is used in the rendering process.Type: GrantFiled: July 16, 2004Date of Patent: December 7, 2010Assignee: Sharp Laboratories of America, Inc.Inventors: John Charles Dalrymple, James Zhixin Chang
-
Publication number: 20090244642Abstract: Systems and methods for utilizing metadata embedded in a color measurement target to uniquely identify the target through color measurement. A color measurement target is used for color calibration, color characterization, color adjustment and/or color correction of a color output device and includes a collection of color patches imaged by the output device, wherein metadata is embedded directly into the color patches of the color measurement target to uniquely identify the target through color measurement. The metadata-bearing patches in the target are used to communicate information through color measurement, and can contribute to the color characterization.Type: ApplicationFiled: May 19, 2009Publication date: October 1, 2009Inventors: John Charles Dalrymple, James Zhixin Chang
-
Publication number: 20090147329Abstract: A method for designing a black generation transfer curve is described. A table is produced to convert a first signal in a first signal space to a second signal in a second signal space. Color measurement data of a device is obtained. The color measurement data relates to a signal-to-color response of the device. A black generation transfer curve is designed constrained by the color measurement data of the device.Type: ApplicationFiled: December 5, 2007Publication date: June 11, 2009Applicant: Sharp Laboratories of America, Inc.Inventors: James Zhixin Chang, John Charles Dalrymple
-
Patent number: 7545541Abstract: Systems and methods for utilizing metadata embedded in a color measurement target to uniquely identify the target through color measurement. A color measurement target is used for color calibration, color characterization, color adjustment and/or color correction of a color output device and includes a collection of color patches imaged by the output device, wherein metadata is embedded directly into the color patches of the color measurement target to uniquely identify the target through color measurement. The metadata-bearing patches in the target are used to communicate information through color measurement, and can contribute to the color characterization.Type: GrantFiled: May 20, 2005Date of Patent: June 9, 2009Assignee: Sharp Laboratories of America, Inc.Inventors: John Charles Dalrymple, James Zhixin Chang
-
Patent number: 7421118Abstract: A method is provided for attenuating image color-cast corrections. The method comprises: selecting a highlight color; accepting a digital image of colored pixels; calculating the difference between the color of at least one pixel and the highlight color; determining an illuminant correction for the digital image; and, attenuating the image illuminant correction for at least one pixel in response to the calculated color differences. In some aspects of the method, a highlight color with a plurality of color components is selected, for example, white. Then, calculating the difference between the color of at least one pixel and the highlight color includes calculating the difference of at least one color component of the pixel from the corresponding component in the highlight color.Type: GrantFiled: March 17, 2003Date of Patent: September 2, 2008Assignee: Sharp Laboratories of America, Inc.Inventor: John Charles Dalrymple
-
Patent number: 7277203Abstract: A method for initializing a printing system using error diffusion is discussed. In application of the invention to color printing systems, the method initializes a first error buffer with a first set of seed values and then initializes at least one other error buffer with another set of seed values. The other set of seed values is negatively correlated with respect to the first set of seed values in the first error buffer. The method then uses the seed values in all the error buffers to start an error diffusion process. For monochrome systems, only one error buffer is initialized with random numbers.Type: GrantFiled: September 21, 2000Date of Patent: October 2, 2007Assignee: Sharp Laboratories of America, Inc.Inventor: John Charles Dalrymple
-
Patent number: 7190487Abstract: A method of color conversion includes providing a first color domain input signal set having plural input signals; sorting the input signals of the first color domain input signal set according to signal intensity; designing and generating plural 1-D look-up table sets for color polyhedrons; selecting a set of look-up tables for use with a specific color polyhedron, wherein said selecting is a function of a section of the polyhedron determined as a function of the input signal set; looking up values in the look-up table set as a function of the input signal set; generating weights as a function of the sorted signal intensities; and interpolating the output from the selected look-up tables as a function of the selected look-up table and the generated weights to produce a color domain signal set which is converted to a desired color domain signal set.Type: GrantFiled: May 27, 2002Date of Patent: March 13, 2007Assignee: Sharp Laboratories of America, Inc.Inventors: John Charles Dalrymple, James Zhixin Chang, Chizu Inoue
-
Patent number: 7161706Abstract: A digital copier or multifunction peripheral (MFP) can perform special document construction functions including “auto-sizing,” scaling a copy to fit a selected size of copy medium, and “auto-cloning” printing a plurality of copies of a single original on a copy medium. The size of the original image is determined from the results of a full resolution scan of the original.Type: GrantFiled: March 30, 2001Date of Patent: January 9, 2007Assignee: Sharp Laboratories of America, Inc.Inventors: Burton L. Levin, John Charles Dalrymple, John E. Dolan
-
Patent number: 6995866Abstract: A method for background adjustment. A background lightness level in an original image is estimated. Pixels are then converted to a luminance-chrominance color space. Pixels have lightness levels equal to the background lightness level are mapped to a value corresponding to white as background pixels. Chroma values for the background pixels are compared to a threshold and adjusted as needed, either by adjusting the lightness value or by removing the chrominance values. The luminance-chrominance data is then converted to output space.Type: GrantFiled: March 14, 2001Date of Patent: February 7, 2006Assignee: Sharp Laboratories of America, Inc.Inventors: Xiao-fan Feng, Jon Matthew Speigle, John Charles Dalrymple, James Zhixin Chang
-
Publication number: 20040183923Abstract: A method is provided for attenuating image color-cast corrections. The method comprises: selecting a highlight color; accepting a digital image of colored pixels; calculating the difference between the color of at least one pixel and the highlight color; determining an illuminant correction for the digital image; and, attenuating the image illuminant correction for at least one pixel in response to the calculated color differences. In some aspects of the method, a highlight color with a plurality of color components is selected, for example, white. Then, calculating the difference between the color of at least one pixel and the highlight color includes calculating the difference of at least one color component of the pixel from the corresponding component in the highlight color.Type: ApplicationFiled: March 17, 2003Publication date: September 23, 2004Applicant: Sharp Laboratories of America, Inc.Inventor: John Charles Dalrymple
-
Publication number: 20030072016Abstract: A method of color conversion includes providing a first color domain input signal set having plural input signals; sorting the input signals of the first color domain input signal set according to signal intensity; designing and generating plural 1-D look-up table sets for color polyhedrons; selecting a set of look-up tables for use with a specific color polyhedron, wherein said selecting is a function of a section of the polyhedron determined as a function of the input signal set; looking up values in the look-up table set as a function of the input signal set; generating weights as a function of the sorted signal intensities; and interpolating the output from the selected look-up tables as a function of the selected look-up table and the generated weights to produce a color domain signal set which is converted to a desired color domain signal set.Type: ApplicationFiled: May 27, 2002Publication date: April 17, 2003Applicant: Sharp Laboratories of America, Inc.Inventors: John Charles Dalrymple, James Zhixin Chang, Chizu Inoue
-
Publication number: 20020149784Abstract: A digital copier or multifunction peripheral (MFP) can perform special document construction functions including “auto-sizing,” scaling a copy to fit a selected size of copy medium, and “auto-cloning” printing a plurality of copies of a single original on a copy medium. The size of the original image is determined from the results of a full resolution scan of the original.Type: ApplicationFiled: March 30, 2001Publication date: October 17, 2002Inventors: Burton L. Levin, John Charles Dalrymple, John E. Dolan