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    • 43. 发明授权
    • Ambient light shield and color filter for imaging-based bar code reader
    • 环境光屏蔽和彩色滤光片,用于基于成像的条码阅读器
    • US07350711B2
    • 2008-04-01
    • US11364250
    • 2006-02-28
    • Duanfeng HeEugene Joseph
    • Duanfeng HeEugene Joseph
    • G06K7/10
    • G06K7/12G06K2207/1011
    • 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. The predetermined wavelength range of the filter includes a wavelength range of an illumination system of the scanner.
    • 适用于读取直接部件标记(DPM)条形码的基于成像的扫描仪的环境照明屏蔽装置。 屏蔽装置包括从扫描仪的壳体延伸并沿着由扫描仪的瞄准装置产生的瞄准图案的行进路径的至少一部分延伸的照明屏蔽物。 屏蔽层在预定波长范围内通过照明,并阻止在预定波长范围之外的照明通过。 屏蔽的预定波长范围包括由瞄准装置产生的瞄准图案的波长范围。 屏蔽装置还包括设置在扫描仪的成像系统附近的滤光器,并且将预定波长范围内的照明传递到像素阵列并阻止照射在预定波长范围之外的通过。 滤波器的预定波长范围包括扫描仪的照明系统的波长范围。
    • 45. 发明申请
    • Digitizing bar code symbol data
    • 数字化条形码符号数据
    • US20050006479A1
    • 2005-01-13
    • US10847159
    • 2004-05-17
    • Duanfeng HeEugene Joseph
    • Duanfeng HeEugene Joseph
    • G06K7/14G02B26/10G06K7/10G06K9/22G06K19/06
    • G06K7/1452G06K7/14
    • Processing an analog electrical signal containing information representative of reflected light from indicia including regions of different light reflectivity, wherein the analog electrical signal contains edge transitions corresponding to boundaries between adjoining regions of different light reflectivity of the indicia. The edge transitions of at least a part of the analog electrical signal are analyzed to determine a level of blur in that part of the electrical signal. Based on the determined level of blur, one of a plurality of different techniques is selected for processing that part of the electrical signal to produce a digitized electrical signal in which transitions in the digital level of the signal correspond to boundaries between adjoining regions of different light reflectivity of the indicia.
    • 处理包含表示来自包括不同光反射率的区域的标记的反射光的信息的模拟电信号,其中模拟电信号包含对应于标记的不同光反射率的相邻区域之间的边界的边缘变换。 分析模拟电信号的至少一部分的边缘跃迁以确定该电信号的该部分中的模糊度。 基于确定的模糊水平,选择多种不同技术中的一种来处理电信号的该部分以产生数字化的电信号,其中信号的数字电平的转变对应于不同光的相邻区域之间的边界 标记的反射率。
    • 47. 发明授权
    • Increasing imaging quality of a bar code reader
    • 提高条码阅读器的成像质量
    • US08167209B2
    • 2012-05-01
    • US12624071
    • 2009-11-23
    • Eugene JosephDuanfeng He
    • Eugene JosephDuanfeng He
    • G06K7/10
    • G06K7/10722
    • The exemplary system requires a 2D barcode be located on an object, a portion of which is to be captured in an image. The module size of the 2D barcode is chosen to match the smallest feature to be preserved on the output image. While the target is moving with respect to the imager the 2D bar code is also moving and the resulting image is degraded. The imager will properly decode the 2D barcode only if the bar code is stationary (or moving very slowly) and hence will provide an acceptable image in the region of the 2D bar code.
    • 示例性系统要求2D条形码位于物体上,其一部分将被捕获在图像中。 选择2D条形码的模块尺寸以匹配要保留在输出图像上的最小特征。 当目标相对于成像器移动时,2D条形码也在移动,并且所得到的图像劣化。 如果条形码是静止的(或移动非常缓慢),则成像器将正确解码2D条形码,因此将在2D条形码区域中提供可接受的图像。
    • 50. 发明申请
    • Imaging System for Reading Mobile Device Indicia
    • 用于阅读移动设备标记的成像系统
    • US20090218405A1
    • 2009-09-03
    • US12040304
    • 2008-02-29
    • Eugene JosephDuanfeng HeLeTian Gu
    • Eugene JosephDuanfeng HeLeTian Gu
    • G06K7/10
    • G06K7/10732
    • A method and imaging assembly (10) are disclosed adapted for reading soft indicia (14) on a mobile device (12). The imaging assembly (10) comprises a scanning arrangement (20) adapted for capturing images from the soft indicia (14). The scanning arrangement (20) has an optical axis with a symmetrically oriented field-of-view (24) about the optical axis that is directed at the soft indicia (14) during operation. The imaging assembly (10) further comprises an illumination source (34) positioned in a housing (18) to provide smart illumination (36) toward the soft indicia (14) to be imaged. The smart illumination (36) construct being that the illumination source (34) is position in close proximity to the optical axis without allowing reflected illumination to enter into the scanning arrangement (20) field-of-view (24) and the smart illumination construct further forming a narrow illumination field-of-view (38) that is projected at the soft indicia (14) during operation.
    • 公开了适于在移动设备(12)上读取软标记(14)的方法和成像组件(10)。 成像组件(10)包括适于从软标记(14)捕获图像的扫描装置(20)。 扫描装置(20)具有在操作期间围绕光轴指向软标记(14)的对称取向视场(24)的光轴。 成像组件(10)还包括定位在壳体(18)中以朝向要被成像的软标记(14)提供智能照明(36)的照明源(34)。 智能照明(36)构造是照明源(34)位于非常接近光轴的位置,而不允许反射照明进入扫描装置(20)视场(24)和智能照明构造 进一步形成在操作期间投射在软标记(14)处的窄照明视野(38)。