Patents by Inventor Edul N. Dalal

Edul N. Dalal 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: 8652574
    Abstract: A light-magenta radiation-curable gel ink including at least one curable monomer, at least one organic gellant, at least one photoinitiator, and a colorant. The colorant includes a magenta colorant, a hue-adjusting colorant that absorbs light having a wavelength of from about 400 to about 500 nm, and an optional shade-adjusting colorant that absorbs light having a wavelength of from about 600 to about 700 nm.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: February 18, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Daryl W. Vanbesien, Karen A. Moffat, Michelle N. Chretien, Barkev Keoshkerian, Richard P. N. Veregin, Jordan H. Wosnick, Valerie M. Farrugia
  • Patent number: 8652575
    Abstract: A light-cyan solid ink including an ink vehicle and a colorant. The colorant includes a cyan colorant, a hue-adjusting colorant that absorbs light having a wavelength of from about 500 to about 600 nm, and an optional shade-adjusting colorant that absorbs light having a wavelength of from about 400 to about 500 nm.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: February 18, 2014
    Assignee: Xerox Corporation
    Inventors: Daryl W. Vanbesien, Edul N. Dalal, Karen A. Moffat, Raymond W. Wong, C. Geoffrey Allen, Maria Mihaela Birau, Richard P. N. Veregin, Jordan H. Wosnick, Valerie M. Farrugia
  • Patent number: 8649054
    Abstract: A method for performing color registration on template media having template markings thereon comprises sensing the template media using a sensor to obtain first image data; printing a test pattern on the template media; sensing the template media along with the test pattern printed thereon using the sensor to obtain second image data; determining an output image data of the test pattern from the first image data, the second image data, and an estimated image data of the template media with the test pattern printed thereon; determining process direction and cross-process direction misregistrations from the output image data; and adjusting printheads based on the process direction and the cross-process direction misregistrations to provide adjusted color registration on subsequent template media. The estimated image data is representative of light scatter from the test pattern and light absorption by the test pattern.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: February 11, 2014
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Publication number: 20140002661
    Abstract: A method for detecting camera degradation and faults comprises identifying a plurality of cameras comprising a camera network, collecting at least one system metric indicative of the camera's performance, analyzing the system metrics according to at least one of a plurality diagnostics layers comprising an individual diagnostic layer, a network diagnostic layer, and a pair diagnostic layer, and identifying a fault condition indicative of a faulty camera in the camera network according to the diagnostic layers.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Publication number: 20130343645
    Abstract: When an imaging device receives an image file that includes a color barcode, a processor of the imaging device and/or a remote processor may decode the barcode by identifying informational elements and calibration elements in the barcode. When the calibration elements are detected, one or more color model parameters are determined, and a color model is developed. When an informational element is then detected, a color value is determined for the informational element, the color model is applied using the color model parameters to yield an adjusted color value for the informational element, and the adjusted color value is used to decode the color barcode.
    Type: Application
    Filed: June 26, 2012
    Publication date: December 26, 2013
    Applicant: XEROX CORPORATION
    Inventors: Edul N. Dalal, Wencheng Wu
  • Publication number: 20130340639
    Abstract: An approach is provided for generating a printing member. The approach involves determining one or more image areas associated with printing one or more images, the one or more image areas being positioned on a surface of a substrate. The approach also involves determining a liquid interaction behavior of at least the surface of substrate is one of hydrophobic or hydrophilic. The approach further involves causing, at least in part, a substance that is the other of the determined liquid interaction behavior of the surface of the substrate to be applied to the one or more image areas on the surface of the substrate by a jetting process. In one embodiment, the printing member is mounted inside a printing system when the substance is applied. In one embodiment, the surface may be completely or partially cleaned and a new image created by another application of the substance.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 26, 2013
    Applicant: XEROX CORPORATION
    Inventors: Edul N. DALAL, Dan René RASMUSSEN
  • Patent number: 8605268
    Abstract: A sensor used for determining area coverages of each colorant in a printed image is provided. The sensor includes a plurality of sensing elements for determining area coverages of each colorant in a printed image that includes a plurality of colorants including a black colorant. One of the sensing elements is an infrared sensing element configured to measure infrared reflection, and the others of the sensing elements are each configured to detect a visible color.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: December 10, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal, Beilei Xu
  • Patent number: 8571268
    Abstract: What is disclosed is a novel system and method for determining printer performance in terms of image quality (IQ) on-paper using on-belt measurements. First, image noise is measured via sensing of single-separation device-dependent colors on an imaging member for a target marking device. Such single-separation device-dependent colors, in one embodiment, comprise cyan, magenta, yellow and black. A predictive correlation model is used to project the image noise of the single-separation device-dependent colors when printed on a substrate. A noise prediction model is used to estimate image noise performance values of multi-separation device-dependent colors on a substrate from the projected single-separation device-dependent colors on a substrate. In one embodiment, the predictive correlation model comprises a separation-dependent polynomial equation. The estimated image noise performance values on a substrate are used to determine image quality metric of the target marking device.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: October 29, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8571269
    Abstract: What is disclosed is a system and method for image quality (IQ) defect detection via classification of halftone dots present on customer prints. In one embodiment, spatially-varying thresholds are applied on the sensed image in order to classify the halftone dots for IQ defect detection. The resolving power of the sensor is characterized and the sensor responses to patches printed with the print device are characterized. A de-blurring filter is designed which is appropriate for compensating the characterized resolving power of the sensor. Image enhancement is applied to the image using the de-blurring filter. Halftone dots present on the prints are classified by analyzing the enhanced image with the results of the sensor response characterization. Once classified, single separation halftone dot images can be more readily analyzed for defects. The present method allows sensor resolution as low as the size of the halftone dots of the printer under test.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: October 29, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Beilei Xu, Edul N. Dalal
  • Publication number: 20130261960
    Abstract: A system and method for informing commuters of real-time time of arrival and cost information with respect to one or more routes prior to commencement of a trip. Reserved lane information (e.g., toll charge, traffic speeds in the reserved and general lanes, etc.) can be integrated with a data feed provided to, for example, navigation enabled devices such as in-car guidance systems or mobile phones. Time of arrival information with respect to the destination can be provided based on wireless data indicative of traffic conditions and highway speed limit information. Additionally, real-time toll charges can be provided to the commuter for multiple routes.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 3, 2013
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8531743
    Abstract: A system and method detect missing inkjets in an inkjet image generating system. The system and method generate digital images of printed documents that do not have test pattern data within them. The digital images are processed to detect light streaks and the positions of the light streaks are correlated to inkjet positions in printheads. Identification of the ink color associated with the correlated inkjet positions are obtained with analysis of color separated images and/or color errors.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: September 10, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8531734
    Abstract: What is disclosed is a system and method for improving image quality of a color of interest using a cluster model in a color printing system involving the following. First, one or more image quality attributes are selected for a target color marking device. A cluster model is received which comprises a plurality of clusters with each cluster having an associated transform. The cluster model is used to estimate an image quality parameter. The image quality parameter is used to select colorant sets and thereby to improve the image quality in the marking device. Various embodiments of the use of cluster models are disclosed.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: September 10, 2013
    Assignee: Xerox Corporation
    Inventors: Lalit Keshav Mestha, Edul N. Dalal, Wencheng Wu
  • Patent number: 8531731
    Abstract: What is disclosed is a novel system and method for determining printer performance in terms of image quality defects over a large complex set of conditions based on measurements taken over a small simple set of conditions, thus reducing the amount of time, effort, and wasted paper required to obtain the data. The present system and method effectively utilizes a predictive model that predicts noise measurements of multi-separations from those of single-separation colors and/or a subset of the multi-separations. Because a model is used to comprehend color performance over the entire gamut, the number of patches is reduced. This reduction enables the method to be used within a machine to dynamically characterize the device's image quality performance. Various embodiments have been disclosed.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: September 10, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8520276
    Abstract: Methods and systems are disclosed which are capable of efficiently performing color management of a variable gloss color printing system. The methods and systems select at least one set of the linear color values corresponding to the color profile for the printing device (at the nominal gloss condition). The linear color values selected comprise those obtained from color values corresponding to each node of the color profile at the nominal gloss condition. In a colorimetric embodiment, the linear color values can comprise: tristimulus values XYZ; red, green, blue (RGB); or luminance component Y, and two chromatic components C1 and C2 (YCC). In a reflectance embodiment, the linear color values comprise reflectance spectra. This exemplary method adds an offset term to each of the linear color values to produce a corresponding set of modified linear color values, and generates a color profile for the printing device at the desired gloss condition based on the modified linear color values.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: August 27, 2013
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu
  • Publication number: 20130215207
    Abstract: An integrated apparatus comprises a sheet supply maintaining cut sheets of media and a printing device positioned to receive the cut sheets of media from the sheet supply. The sheet supply may comprise a plurality of sheet feeders. The printing device places markings on the cut sheets of media. Further, this apparatus includes an adhesive applicator positioned to apply adhesive to one side of the sheets to produce labels; and a roll apparatus maintaining a continuous supply roll of backing media. The roll apparatus is positioned to receive the labels from the adhesive applicator, and the backing media is positioned within the roll apparatus to contact the adhesive-applied side of the labels.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 22, 2013
    Applicant: Xerox Corporation
    Inventors: Edul N. Dalal, Barry P. Mandel
  • Publication number: 20130191014
    Abstract: A system and method which detects and uses a point of contact between a vehicle's tire and the pavement as a reference point to improve the accuracy of vehicle speed detection in a motorized vehicle speed detection system. In one embodiment, a plurality of infrared images of a moving vehicle are received. Each of the images is separated in time by known intervals. The images are captured using an infrared camera which can be a single-band or multi-band camera which operates in an infrared wavelength band selected to enhance a contrast between the vehicle's tires and the road surface. For each image, a point of contact is determined where a same tire contacts the road surface. These points and the time interval separations are used to calculate the vehicle's speed. An alert signal is initiated to a traffic enforcement authority if the speed exceeds the road's speed limit.
    Type: Application
    Filed: January 24, 2012
    Publication date: July 25, 2013
    Applicant: XEROX CORPORATION
    Inventors: Edul N. Dalal, Wencheng Wu
  • Patent number: 8493621
    Abstract: A method for optimally using color patch codes or color barcodes for transmitting machine-readable information, via device characterization, is disclosed to comprise characterizing a printing device and optionally a sensing device for identifying a number of recognizably spaced printer output colors; deriving a code book, by relating the printer output colors and their corresponding input values to information elements; and using the code book for encoding and decoding the information to be transmitted. The recognizably spaced printer output colors are in terms of a color space relevant to a color patch code or color barcode sensing device, and are related to the corresponding marking device input values.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: July 23, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8488191
    Abstract: What is disclosed is a novel system and method for determining color profiles based upon optimizing output image spatial noise. For each of a number of selected output colors, spatial noise values for a set of device-dependent color specifications that produce the selected output color are iteratively determined. The set of device-dependent color specifications is generated by varying a subset of colorants in the device-dependent color specifications while changing the remaining colorants to maintain the selected output color. The iterative process improves the spatial noise value, as determined by a spatial noise model, of the device-dependent color specifications that correspond to the selected output color. When an optimum spatial noise value is found, the device-dependent color specification having that spatial noise value is selected as the mapping for the selected device-independent color specification. Various embodiments are disclosed.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: July 16, 2013
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu, Martin S. Maltz
  • Patent number: 8477370
    Abstract: What is disclosed is a novel system and method for determining color profiles based upon optimizing image output color stability. For each of a number of selected output colors, color stability values for a set of device-dependent color specifications that produce the selected output color are iteratively determined. The set of device-dependent color specifications is generated by varying a subset of colorants in the device-dependent color specifications while changing the remaining colorants to maintain the selected output color. The iterative process improves the color stability value, as determined by a color stability model, of the device-dependent color specifications that correspond to the selected output color. When an optimum color stability value is found, the device-dependent color specification having that color stability value is selected as the mapping for the selected device-independent color specification. Various embodiments are disclosed.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: July 2, 2013
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu, Martin S. Maltz
  • Patent number: 8477372
    Abstract: What is disclosed is a novel system and method for determining a printer metric in terms of image quality (IQ) over a large complex set of conditions based upon measurements taken over a small simple set of conditions while compensating for printer drift. The present system and method effectively utilizes a predictive model that predicts noise measurements of multi-separations from those of single-separation colors and/or a subset of the multi-separations. Because a model is used to comprehend the metric over the entire gamut, the number of patches is reduced. This reduction enables the method to be used within a machine to dynamically characterize the device's image quality metric. Various embodiments have been disclosed.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: July 2, 2013
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal