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    • 4. 发明申请
    • Automatic focusing system for imaging-based bar code reader
    • 自动对焦系统,用于基于成像的条码阅读器
    • US20060038017A1
    • 2006-02-23
    • US10903792
    • 2004-07-30
    • Bradley CarlsonEugene JosephKefie Lu
    • Bradley CarlsonEugene JosephKefie Lu
    • G03B7/08
    • G06K7/10811G02B7/08
    • An automatic focusing system for an imaging-based bar code reader. The automatic focusing system employs a two step process for moving a lens of an imaging system along its path of travel such that a sharp image of a target bar code is projected or focused onto an imaging system pixel array. The first step is laser ranging which utilizes a laser beam for range finding. Laser ranging determines a distance between the imaging system pixel array and the target bar code. Given the determined distance, the automatic focusing system moves the lens to a suitable position for imaging the target bar code. If ambient conditions prevent laser ranging from properly working, the second step is focus analysis. Focus analysis involves moving the lens in accordance with a search routine and analyzing image frames of the target object to find a suitable focus position.
    • 一种用于基于成像的条码阅读器的自动对焦系统。 自动对焦系统采用两步法,沿着其行进路线移动成像系统的透镜,使得目标条形码的清晰图像投影或聚焦到成像系统像素阵列上。 第一步是使用激光束进行测距的激光测距。 激光测距确定成像系统像素阵列与目标条形码之间的距离。 给定确定的距离,自动聚焦系统将镜头移动到合适的位置,用于对目标条形码进行成像。 如果环境条件阻止激光测距正常工作,第二步就是焦点分析。 焦点分析涉及根据搜索程序移动镜头并分析目标对象的图像帧以找到合适的焦点位置。
    • 5. 发明申请
    • System and method for reading and decoding optical codes using multiple color illumination
    • 使用多种颜色照明来读取和解码光学代码的系统和方法
    • US20050011956A1
    • 2005-01-20
    • US10621831
    • 2003-07-17
    • Bradley Carlson
    • Bradley Carlson
    • G06K7/10
    • G06K7/10851G06K7/10732
    • An optical code reading system and method are provided for reading and decoding an optical code. The system includes a plurality of light sources, a color image sensor, a processor and a decoder. Each light source produces a unique wavelength/color of light to illuminate the optical code, such as a direct mark optical code. The image sensor detects the reflected light from the optical code and generates an integrated multi-colored image. The processor separates the integrated image into individual color channels, where each color channel includes data representative of the imaged optical code in one color. The processor analyzes the contrast for each color channel and determines which color channel has the optimum contrast. The data corresponding to the color channel having the optimum contrast is then decoded by a decoder.
    • 提供了用于读取和解码光学代码的光学代码读取系统和方法。 该系统包括多个光源,彩色图像传感器,处理器和解码器。 每个光源产生独特的波长/颜色的光以照亮光学代码,例如直接标记光学代码。 图像传感器检测来自光学代码的反射光,并产生一个集成的多色图像。 处理器将集成的图像分离成单独的颜色通道,其中每个颜色通道包括表示一种颜色的成像光学代码的数据。 处理器分析每个颜色通道的对比度,并确定哪个颜色通道具有最佳对比度。 对应于具有最佳对比度的彩色通道的数据由解码器解码。