Patents by Inventor Duanfeng He

Duanfeng He 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).

  • Method and apparatus for reading indicia
    Publication number: 20090084849
    Abstract: A method and apparatus is provided for reading indicia comprising a programmable scanning system (10) capable of reading a first object (18) scanned by the apparatus. The first object (18) initiates a program (24) internal to the apparatus providing a verb configuration indicating the type of programming actions to be taken by the apparatus. The programmable scanning system (10) is capable of reading a second object (26) scanned by the apparatus. The second object is decoded by internal circuitry of the scanning system (10) to provide a symbology type. The program (24) is selectively formatted by the first object (18) to read or not read the verb configuration of the symbology type of the second object (20) in target objects to be read.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: SYMBOL TECHNOLOGIES, INC.
    Inventors: Duanfeng He, Robert James Pang
  • Imaging-Based Bar Code Reader Utilizing Modified Rolling Shutter Operation
    Publication number: 20090084847
    Abstract: An imaging system for use in an bar code reader for imaging a target bar code. The imaging system includes a 2D sensor array generating a series of image frames and The sensor array can be selectively operated in a rolling shutter mode of operation or a pseudo global shutter mode of operation. The imaging system further includes an imaging lens assembly to focus light from the field of view onto the sensor array and an image analysis system for analyzing the series of image frames generated by the sensor array for image brightness and, based on image brightness, operating the sensor array in a selected one of the rolling shutter mode of operation and the pseudo-global shutter mode of operation.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 2, 2009
    Applicant: Symbol Technologies, Inc.
    Inventors: Duanfeng He, Bradley S. Carlson
  • Multiple Configuration Image Scanner
    Publication number: 20090078773
    Abstract: An imaging-based bar code reader that includes an imaging and decoding system. Focusing optics and a sensor array define a field of view. An exemplary system has an image sensor includes multiple configuration registers. With multiple configuration registers a video mode can be implemented where the video consists of a continuous sequence of frames with a fixed sequence a number of configurations. The configurations can vary the frame size, exposure time, gain, etc. Compared to a sensor with only one set of configuration registers, successive frames can be captured with different configurations without synchronization issues or frame lag.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 26, 2009
    Applicant: Symbol Technologies, Inc.
    Inventors: Bradley S. Carlson, Duanfeng He
  • Graphical User Interface for Use in Programming a Barcode Reader
    Publication number: 20090078774
    Abstract: An imaging-based bar code reader that includes an imaging and decoding system. Focusing optics and a sensor array define a field of view. A data processor has a memory for storing a pattern definition of previously imaged OCR characters and comparing a format of said previously stored characters to a present image to determine a character content of the present image.
    Type: Application
    Filed: September 21, 2007
    Publication date: March 26, 2009
    Applicant: Symbol Technologies, Inc.
    Inventor: Duanfeng He
  • Imaging-Based Bar Code Reader with Image Stabilization
    Publication number: 20090001170
    Abstract: An imaging-based bar code reader (10) featuring: an imaging system (20) including an imaging lens assembly (26) and a sensor array (28); an image stabilization system (30) including a sensor system (34) to determine pitch and yaw movements (PM, YM) of the lens assembly (26) and a compensating optical element (26e) moveable along two axes (YL, XL) orthogonal to the optic axis (OA) of the imaging lens assembly (26) to compensate for pitch and yaw movements (PM, YM), the image stabilization system (30) being selectively actuatable; and an image analysis system (31) coupled to the image stabilization system (30), the image analysis system (31) analyzing blurring of an imaged target bar code (14?), when blurring exceeds a threshold value, the image stabilization system (30) being actuated when imaging the target bar code (14) to reduce blurring of the imaged target bar code (14?).
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: Symbol Technologies, Inc.
    Inventor: Duanfeng He
  • COMPACT AUTOFOCUS BAR CODE READER WITH MOVING MIRROR
    Publication number: 20080290169
    Abstract: The disclosed bar code reader includes an auto-focusing component for rapidly producing in focus images. An imaging system makes use of an aiming pattern that impinges upon the coded indicia of a target. The imaging system includes a light monitoring pixel array and a focusing lens that is fixed with respect to the pixel array for transmitting an image of the target object onto the pixel array. The imaging system also includes a movable mirror mounted for movement along a path of travel to reflect light passing through the focusing lens onto the pixel array. A drive motor moves the mirror relative the lens to adjust a focus of an image of the object formed at the pixel array. An automatic focusing component of the imaging system analyzes the aiming pattern reflected from the target object and projected onto the pixel array by the lens.
    Type: Application
    Filed: May 25, 2007
    Publication date: November 27, 2008
    Applicant: Symbol Technologies, Inc.
    Inventors: Vladimir Gurevich, Igor Vinogradov, Tsi David Shi, Duanfeng He
  • System and method for locating a predetermined pattern within an image
    Patent number: 7455231
    Abstract: Described is a method of locating a predetermined pattern. An image is divided into a predetermined number of areas. A search sequence indicative of an order in which the areas are to be analyzed for the predetermined pattern is determined. The areas in the search sequence are analyzed until either a predetermined time elapses or the predetermined pattern is detected. When the predetermined time has elapsed before the predetermined pattern is detected, a further image is obtained. Then, areas remaining in the sequence are analyzed in the further image beginning with an area to be analyzed immediately after a last analyzed area of the image until either the predetermined time elapses or the predetermined pattern is detected in one of the remaining areas.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: November 25, 2008
    Assignee: Symbol Technologies, Inc.
    Inventor: Duanfeng He
  • 1-D barcode decoding with 2-D sensor array
    Patent number: 7428991
    Abstract: A scanner with a two dimensional array of sensors generates an aiming pattern that is concurrently used as illumination for a segment of the array. In this manner, one-dimensional and simple two-dimensional barcodes can be quickly processed by loading and decoding only the segment of the array.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: September 30, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Eugene Joseph, Bradley Carlson, Duanfeng He
  • Processing image data from multiple sources
    Patent number: 7430682
    Abstract: Interleaving multiple logical data streams into one physical data stream reduces overhead required to process the multiple logical data streams. Multiple arrays of data values are interleaved into a combined array of data that simulates a frame of data for input to a data port such as a video port. Revised timing and synchronization signals are provided to permit transmission of the combined array according to video data port protocol. The processor includes instructions for locating the various arrays of data values within the combined array.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: September 30, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Bradley Carlson, William Sackett, Eugene Joseph, Duanfeng He
  • Compact image projection arrangement with correction for laser beam angular misalignment
    Publication number: 20080204669
    Abstract: A lightweight, compact image projection module has a laser package having a common exit port, and a plurality of lasers mounted in the package and operative for emitting a plurality of laser beams of different wavelengths through the common exit port. An optical assembly focuses the laser beams exiting the common exit port, and includes a common focusing lens through which the laser beams pass along respective paths that are in angular misalignment. An optical corrector element in at least one of the paths corrects the misalignment to produce aligned beams. A scanner sweeps the aligned beams in a pattern of scan lines, each scan line having a number of pixels. A controller causes selected pixels to be illuminated, and rendered visible, by the aligned beams to produce the image.
    Type: Application
    Filed: February 28, 2007
    Publication date: August 28, 2008
    Inventors: Duanfeng He, Miklos Stern, Dmitriy Yavid
  • Zero-footprint camera-based point-of-sale bar code presentation scanning system
    Patent number: 7395970
    Abstract: A bar code scanning system and method for reading and processing bar code symbology uses a scanning station installed above the check-out stand and a receiving station at some distance away from the scanning station. The scanning station projects light onto a surface of the check-out stand. The projected light can have a well defined border indicating where a user should place items to be scanned. Alternatively, a pattern coincident with the projected light can be projected onto the surface and which includes a target indicating where items should be placed for scanning. Light reflected by items in the target region is processed to decode optical symbology on the item and produce a signal that is representative of said sensed symbology. Information about the scanned item can be processed and displayed by the receiving station for use in, e.g., a point-of-sale transaction.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: July 8, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Paul Poloniewicz, Mehul Patel, Sundeep Kumar, Joseph Cai, Duanfeng He
  • SYSTEM AND METHOD FOR READING CODES ON A SPECULAR BACKGROUND
    Publication number: 20080142600
    Abstract: A barcode reader having a light source illuminating a barcode, a diffuser disposed between the light source and the barcode, a camera opening at least partially surrounded by the diffuser, light reflected from the barcode passing through the camera opening and a camera oriented to acquire light reflected from the barcode after passing through the diffuser from the light source.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Eugene Joseph, Duanfeng He, Mark Drzymala
  • AIMING SYSTEM AND METHOD FOR DIFFUSER ILLUMINATION SYSTEMS
    Publication number: 20080142597
    Abstract: A barcode reader having a diffuser providing diffused light to a surface including a target barcode, the diffuser including an aiming screen portion, a camera capturing an image of the target barcode and an aiming mechanism projecting an aiming pattern on the surface, the aiming pattern being reflected by the surface, wherein, when a reflection of the aiming pattern creates an aiming image on the aiming screen, the barcode reader is oriented to read the target barcode.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Inventors: Eugene Joseph, Duanfeng He
  • Method of authenticating products using analog and digital identifiers
    Patent number: 7364074
    Abstract: A method of identifying or authenticating a product by providing an analog identification indicium including a randomized pattern of identification features on a first part of the product wherein one or more attributes of the randomized pattern of identification features correspond to an item identifier. A digital identification record is provided on a second part of the product including an encoded digital version of the item identifier, the first and second parts being separable when the product is used. The randomized pattern of identification features of the analog identification indicium is read and decoded to generate an item identifier and the digital identification record is read and decoded to generate an item identifier. The product is deemed authentic if the item identifier from the analog identification indicium substantially matches the item identifier from the digital identification record.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: April 29, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Duanfeng He, William J. Callahan
  • Ambient light shield and color filter for imaging-based bar code reader
    Patent number: 7350711
    Abstract: An ambient illumination shielding apparatus for an imaging-based scanner adapted to read direct part marking (DPM) bar codes. The shielding apparatus includes an illumination shield extending from a housing of the scanner and extending along at least a portion of a path of travel of an aiming pattern generated by an aiming apparatus of the scanner. The shield passes illumination within a predetermined wavelength range and impedes passage of illumination outside of the predetermined wavelength range. The predetermined wavelength range of the shield includes a wavelength range of the aiming pattern generated by the aiming apparatus. The shielding apparatus further includes a filter disposed in proximity to an imaging system of the scanner and passing illumination within a predetermined wavelength range to the pixel array and impeding the passage of illumination outside of the predetermined wavelength range.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: April 1, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Duanfeng He, Eugene Joseph
  • Age verification system and method in electro-optical reader
    Publication number: 20080073425
    Abstract: Age is verified by electro-optically reading a date of birth in a machine-readable format on a target, and by comparing the date of birth with a current date or a latest acceptable date. An output signal is generated when the date of birth and the date differ by a predetermined time period.
    Type: Application
    Filed: September 25, 2006
    Publication date: March 27, 2008
    Inventors: Christopher Warren Brock, Duanfeng He
  • Barcode scanner decoding
    Patent number: 7337970
    Abstract: A two dimensional symbol is decoded by forming a sub-sampled image that is used to generate symbol margins for use in digitization. The sub-sampled image is based on local levels of contrast in the symbol. By using a sub-sampled image derived from local levels of contrast in the symbol to determine the symbol margins, margins can be located efficiently and in the presence of symbol contrast variation caused by irregularities in the marked surface or light source angles. Digitization proceeds based on the determined margins.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: March 4, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Eugene Joseph, Duanfeng He
  • Swipe Imager Scan Engine
    Publication number: 20080023560
    Abstract: An imaging scan engine includes both a solid-state camera and an illumination source in the same package. The scan engine unit simplifies the integration of swipe imaging components into new and existing scanners.
    Type: Application
    Filed: October 11, 2007
    Publication date: January 31, 2008
    Applicant: Symbol Technologies, Inc.
    Inventors: Duanfeng He, Warren Zuelch
  • Methods and Apparatus for Information Capture Illumination
    Publication number: 20080000978
    Abstract: Methods and apparatus for illuminating objects comprising asymmetrically illuminating an object using an illumination medium on one side of an optical module of an information capturing module, capturing an electronic representation of the object and decoding the electronic representation of said object. In alternate embodiments, the scanner successively illuminates the object from a plurality of different angles until the object and/or dataform is decoded. The illumination medium can be external to the information capturing module.
    Type: Application
    Filed: September 14, 2007
    Publication date: January 3, 2008
    Inventors: Duanfeng He, Eugene Joseph
  • Method of authenticating products using hardware compatibility flag
    Patent number: 7309011
    Abstract: A method of identifying or authenticating a product by providing an analog identification indicium including a randomized pattern of identification features on a first part of the product wherein one or more attributes of the randomized pattern of identification features correspond to an item identifier. A digital identification record is provided on a second part of the product including an encoded digital version of the item identifier, the first and second parts being separable when the product is used. The randomized pattern of identification features of the analog identification indicium is read and decoded to generate an item identifier and the digital identification record is read and decoded to generate an item identifier. The product is deemed authentic if the item identifier from the analog identification indicium substantially matches the item identifier from the digital identification record.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: December 18, 2007
    Assignee: Symbol Technologies, Inc.
    Inventor: Duanfeng He