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).

  • Publication number: 20150044657
    Abstract: A video-based teaching aid system and method. Video images are recorded of at least some of a plurality of people in a classroom setting by use of a video camera arrangement. Expressions of the people in the video images are identified by use of an expression recognition module configured to receive the video images from the video camera arrangement. The identified expressions of the people in the video images are correlated with at least one of an event or an outcome of an event occurring in a classroom setting by use of a correlation module. The results of the correlating are outputted by an output device.
    Type: Application
    Filed: August 7, 2013
    Publication date: February 12, 2015
    Applicant: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu, Richard L. Howe
  • Publication number: 20150019436
    Abstract: A method, a system, and a computer program product for processing a plurality of electronic documents are provided. The method includes marking at least one area in an electronic document selected from the plurality of electronic documents. The marked at least one area is then matched with corresponding area in the remaining electronic documents of the plurality of electronic documents. A score is computed for each of the remaining electronic documents of the plurality of electronic documents based on the matching. The plurality of electronic documents is then grouped into one or more groups based on the score.
    Type: Application
    Filed: July 12, 2013
    Publication date: January 15, 2015
    Inventors: Edul N. Dalal, Wencheng Wu, Yu An Sun, Julien Bourdaillet
  • Patent number: 8935082
    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: Grant
    Filed: January 24, 2012
    Date of Patent: January 13, 2015
    Assignee: Xerox Corporation
    Inventors: Edul N Dalal, Wencheng Wu
  • Publication number: 20140363045
    Abstract: Methods and systems receive a series of images and compare at least two of the images in the series of images to locate items that are in different positions to identify moving items. Such methods and systems further calculate a measure of the moving items within the series of images. Additionally, such methods and systems perform a continuously variable image correction to remove the moving items from the images to produce a series of corrected images. This “continuously variable image correction” increases the amount of image correction for a relatively higher measure of the moving items and decreases the amount of image correction for a relatively lower measure of the moving items, and does so continuously as the measure of the moving items changes within the series of images.
    Type: Application
    Filed: June 10, 2013
    Publication date: December 11, 2014
    Inventors: Wencheng Wu, Edul N. Dalal, Orhan Bulan
  • Publication number: 20140337348
    Abstract: Methods and systems receive an image-processing request relating to user images from a user. Such methods and systems classify the user images into user-request image-element categories. Such methods and systems also retrieve previously stored user-specific preferences for the user-request image-element categories from a computer storage, when the previously stored user-specific preferences for the user-request image-element categories are maintained in the computer storage. However, when the previously stored user-specific preferences for the user-request image-element categories are not maintained in (are absent from) the computer storage, such methods and systems obtain additional user-specific preferences for the user-request image-element categories. Such methods and systems can then processes the image-processing request by altering renditions of the user images according to the previously stored user-specific preferences and/or the additional user-specific preferences.
    Type: Application
    Filed: May 10, 2013
    Publication date: November 13, 2014
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8879832
    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: Grant
    Filed: June 26, 2012
    Date of Patent: November 4, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu
  • Publication number: 20140324555
    Abstract: A method for evaluation of one or more remote workers is disclosed. The method includes publishing a set of tasks. The set of tasks includes a first subset of tasks and a second subset of tasks. The first subset of tasks is generated with a set of defined responses. The method further includes receiving a first subset of responses corresponding to the first subset of tasks from the one or more remote workers. The first subset of responses is then compared with the set of defined responses, and the one or more remote workers are analyzed based on the comparison.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 30, 2014
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Publication number: 20140321775
    Abstract: Disclosed embodiments relate to systems and methods for facilitating retrieval of information from an image. The one or more image characteristics are modified to degrade the original image. The degraded image is provided as a first task to at least one first remote worker, the first task corresponds to an activity of tagging one or more regions of interest in the degraded image by the at least one first remote worker. Further, one or more second images are generated based on the one or more tagged regions of interest and are provided as one or more second tasks to at least one second remote worker, the one or more second tasks correspond to an activity of retrieving information from the one or more second images.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 30, 2014
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Publication number: 20140313347
    Abstract: Methods and systems are disclosed for updating camera geometric calibration utilizing scene analysis. Geometric calibration parameters can be derived with respect to one or more cameras and selected reference points of interest identified from a scene acquired by one or more of such cameras. The camera geometric calibration parameters can be applied to image coordinates of the selected reference points of interest to provide real-world coordinates at a time of initial calibration of the camera(s). A subset of a video stream from the camera(s) can then be analyzed to identify features of a current scene captured by the camera(s) that match the selected reference points of interest and provide a current update of the camera geometric calibration parameters with respect to the current scene.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 23, 2014
    Applicant: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal, Raja Bala
  • Patent number: 8868339
    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: Grant
    Filed: March 29, 2012
    Date of Patent: October 21, 2014
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8861023
    Abstract: What is disclosed is a novel system and method for determining and capturing the designer intended colors in an image so that the printer has an accurate color rendition target. The present method operates by capturing the monitor RGB values together with the monitor profile to get a representation of the intended image in a device-independent color space like L*a*b*. The teachings hereof work for vector graphics as well as raster images. Advantageously, this invention solves a real problem currently existing, for example, in the packaging print market, wherein colors produced from multiple spot colors with their overlays and blends are not well color managed.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: October 14, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu, Robert J. Rolleston
  • Patent number: 8811664
    Abstract: What is disclosed is a method for vehicle occupancy detection using a single band infrared imaging system. First, an infrared image of a vehicle intended to be processed for human occupancy detection is captured using a single band infrared camera set to a predefined wavelength band. A candidate sub-image is identified within the captured image. A cumulative histogram is formed using the reflectance values of each pixel in the candidate region. A threshold reflectance value is then determined from the cumulative histogram using a pre-defined cumulative occurrence fraction value which corresponds to a value equivalent to an average sized human face. Embodiments for setting the threshold reflectance value are disclosed. Thereafter, human occupants can be distinguished in the image from the vehicle's interior by comparing pixel reflectances in the sub-image against the threshold reflectance value.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 19, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Peter Paul, Lalit Keshav Mestha, Abu Saeed Islam
  • Patent number: 8797589
    Abstract: A computer-implemented method for color calibration and profiling of an output device includes measuring a color patch in a test pattern, which comprises a plurality of color patches, to obtain first image data; measuring the color patch in the test pattern to obtain second image data; transforming the first image data to a first estimated image data; determining a difference between the second image data and the first estimated image data to obtain a correction factor; and calculating, for each patch in the test pattern, a corrected image data by applying the correction factor to a subsequent estimated image data from the first sensor. The correction factor is used for correcting inaccuracies introduced when the first image data is transformed into the first estimated image data. The first image data and the second image data provide a measured color representation of the color patch in a device dependent color space and a device independent color space, respectively.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: August 5, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Wencheng Wu
  • Publication number: 20140210970
    Abstract: A method, system, and processor-readable medium for non-invasive visual compensation for a person suffering from central vision impairment. Digital images of a target field of view can he obtained and processed to generate processed images thereof, wherein central regions of the digital images that normally would reach an impaired portion of a retina of the person are moved to other regions of the target field of view. The processed images can be presented to the person such that the central regions are now directed at an unimpaired peripheral portion of the retina of the person.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Applicant: XEROX CORPORATION
    Inventors: Edul N. Dalal, Wencheng Wu
  • Patent number: 8767254
    Abstract: Images are prepared for blending with a reflection. Angles of incidence and angles or reflection lead to reflections of a viewer appearing to be different than actual size. Accordingly, image preparation can include scaling images of objects to be blended with a reflection to an appropriate size. For a flat specular surface the size is one half the size the object would be if the object were sized to be associated with the feature that is reflected. A viewer will focus on the reflection of the viewer at an object plane. An image associated with the specular surface will be blurred. Accordingly, the preparation can include compensating for the blurring. Preparation can also include reducing an area coverage of the image of the object to no more than about fifty percent of the region of the refection to provide space for the reflection.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporartion
    Inventors: Robert P. Loce, Edgar A. Bernal, Edul N. Dalal
  • Patent number: 8757609
    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: Grant
    Filed: February 17, 2012
    Date of Patent: June 24, 2014
    Assignee: Xerox Corporation
    Inventors: Edul N. Dalal, Barry P. Mandel
  • Publication number: 20140111538
    Abstract: Methods and systems present, to a user, different versions of sample images. Each of the sample images is classified into at least one image-element category of multiple image-element categories. Such methods and systems request the user to select preferred versions of the sample images from the different versions of the sample images, and receive in response a user selection of preferred images. The methods and systems determine user-specific preferences for each of the image-element categories based on the user selection of the preferred images. The methods and systems receive an image-processing request relating to user images from the user, and classify the user images into the image-element categories. When processing the image-processing request, the methods and systems alter renditions of the user images according to the user-specific preferences for each image-element category.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8692690
    Abstract: An automated vehicle speed measurement and enforcement method and system. Traffic can be continuously monitored utilizing an image capturing unit and a controller. The speed of one or more vehicles within an effective field of view of the image capturing unit can be estimated. A burst of radiation from an associated remote sensing device can be triggered when a vehicle is detected having a speed greater than a predetermined value. An accurate speed of the vehicle can then be determined. Additionally, a transverse velocity component associated with the vehicle can be computed by the image capturing unit in order to thereafter apply the transverse velocity component to a reading generated by the remote sensing device to correct a cosine error with respect to the remote sensing device.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: April 8, 2014
    Assignee: Xerox Corporation
    Inventor: Edul N. Dalal
  • Publication number: 20140071281
    Abstract: A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: XEROX CORPORATION
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 8670153
    Abstract: What is disclosed is a novel system and method for mapping out-of-gamut colors to a device's gamut to improve image quality in a color document reproduction device involves performing the following. First, an out-of-gamut color xi, which is intended to be mapped to a boundary surface of a color gamut of a color marking device, is selected. A gamut mapping function is also selected. The selected gamut mapping function is intended to be applied to the selected out-of-gamut color point. At least one performance attribute is then selected for the color marking device and a multi-objective cumulative cost JT is determined based upon a combination of costs Jgm and Js. The multi-objective cumulative cost JT is then iteratively driven to a minimum. Once the minimum has been determined, a gamut mapping of the selected out-of-gamut color can then be performed using the minimized multi-objective cumulative cost. Various embodiments are disclosed.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: March 11, 2014
    Assignee: Xerox Corporation
    Inventors: Alvaro Enrique Gil, Lalit Keshav Mestha, Wencheng Wu, Edul N. Dalal