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    • 84. 发明授权
    • Indicia reading terminal having image sensor and variable lens assembly
    • 具有图像传感器和可变透镜组件的标记读取终端
    • US08256678B2
    • 2012-09-04
    • US12540168
    • 2009-08-12
    • William H. HavensTimothy P. Meier
    • William H. HavensTimothy P. Meier
    • G06K7/10
    • G06K7/0004G06K7/10722G06K7/10752G06K7/10811H04N5/2353
    • There is described an image sensor based indicia reading terminal comprising a variable setting imaging lens having a first setting at which the terminal has a first plane of optimum focus and a second setting at which the terminal has a second plane of optimum focus. According to one embodiment, a first predetermined picture size where picture size is determined according to a number of pixels subject to read out, can be associated to the first lens setting and a second picture size can be associated to the second lens setting such that the terminal with the lens setting set to the first setting reads out a frame of a first picture size and with the lens setting set to a second setting reads out a frame of a second picture size. In addition to or in place of the picture size operational parameters, different operational parameters can be associated to the respective first and second lens settings. Additionally or alternatively, different processes for determining an operational parameter and/or different algorithms for determining an operational parameter can be associated to each of the first and second lens settings.
    • 描述了基于图像传感器的标记读取终端,其包括具有第一设置的可变设置成像透镜,其中终端具有第一平面的最佳聚焦,第二设置在终端具有第二平面的最佳焦点。 根据一个实施例,根据被读出的像素的数量确定图像尺寸的第一预定图像大小可以与第一透镜设置相关联,并且第二图像尺寸可以与第二透镜设置相关联,使得 将设置为第一设置的镜头设置的终端读出第一图像大小的帧,并且将镜头设置设置为第二设置读出第二图像大小的帧。 除了图像大小的操作参数或代替图像大小的操作参数之外,不同的操作参数可以与相应的第一和第二透镜设置相关联。 附加地或替代地,用于确定操作参数的不同过程和/或用于确定操作参数的不同算法可以与第一和第二透镜设置中的每一个相关联。
    • 88. 发明授权
    • Method and apparatus for compensating for fixed pattern noise in an imaging system
    • 用于补偿成像系统中固定模式噪声的方法和装置
    • US07719580B2
    • 2010-05-18
    • US11998870
    • 2007-11-30
    • William H. HavensRobert M. Hussey
    • William H. HavensRobert M. Hussey
    • H04N5/217
    • H04N5/2173H04N5/2176H04N5/3651H04N5/3658H04N5/76
    • The invention relates to a method and apparatus for configuring an imaging system to compensate for fixed pattern noise, variations in pixel values captured from an image sensor that vary according to a fixed pattern. In a method for configuring an imaging system for compensating an additive term component of fixed pattern noise, a pixel array is exposed to a scene of known radiance and an average white value is determined for each pixel of an array. Each average white value is compared to a predetermined reference value to determine a correction value for each pixel. In a method for configuring an imaging system for compensating both an additive and multiplicative component of fixed pattern noise, a pixel array is exposed to a first scene having a first known radiance, and frames of the scene are captured, and then the array is exposed to a second scene having a second known radiance and frames of the second scene are captured. After first and second average white values are determined for each pixel additive and multiplicative term correction values for each pixel are then determined by solving for a system of equations relating the first and second average white values and first and second scene radiances. Correction values can be utilized to correct pixel values of a frame of image data, and a decoding algorithm for attempting to decode a frame of image data including corrected pixel values can be activated.
    • 本发明涉及一种用于配置成像系统以补偿固定图案噪声,根据固定图案变化的从图像传感器捕获的像素值的变化的方法和装置。 在用于配置用于补偿固定图案噪声的加法项分量的成像系统的方法中,将像素阵列暴露于已知辐射的场景,并且针对阵列的每个像素确定平均白色值。 将每个平均白色值与预定的参考值进行比较,以确定每个像素的校正值。 在用于配置用于补偿固定图案噪声的附加和乘法分量的成像系统的方法中,像素阵列暴露于具有第一已知辐射的第一场景,并且捕获场景的帧,然后阵列被曝光 到具有第二已知辐射的第二场景,并且捕获第二场景的帧。 在为每个像素加法确定第一和第二平均白色值之后,然后通过求解与第一和第二平均白色值以及第一和第二场景辐射有关的方程组来确定每个像素的乘法项校正值。 校正值可用于校正图像数据帧的像素值,并且可以激活用于尝试解码包括校正像素值的图像数据的帧的解码算法。
    • 89. 发明申请
    • APPARATUS HAVING COORDINATED EXPOSURE PERIOD AND ILLUMINATION PERIOD
    • 具有协调曝光期和照明期的装置
    • US20100090007A1
    • 2010-04-15
    • US12534664
    • 2009-08-03
    • Ynjiun P. WangWilliam H. Havens
    • Ynjiun P. WangWilliam H. Havens
    • G06K7/10
    • H04N5/378G06K7/10722G06K7/1439H04N5/2253H04N5/2256H04N5/23245H04N5/23293H04N5/2353H04N5/374H04N5/3765
    • The invention features an image reader and a corresponding method for capturing a sharp distortion free image of a target, such as a one or two-dimensional bar code. In one embodiment, the image reader comprises a two-dimensional CMOS based image sensor array, a timing module, an illumination module, and a control module. The time during which the target is illuminated is referred to as the illumination period. The capture of the image by the image sensor array is driven by the timing module that, in one embodiment, is able to simultaneously expose substantially all of the pixels in the array. The time during which the pixels are collectively activated to photo-convert incident light into charge defines the exposure period for the sensor array. In one embodiment, at least a portion of the exposure period occurs during the illumination period.
    • 本发明的特征在于一种图像读取器和用于捕获诸如一维或二维条形码的目标的无失真图像的相应方法。 在一个实施例中,图像读取器包括基于二维CMOS的图像传感器阵列,定时模块,照明模块和控制模块。 目标照明的时间被称为照明周期。 由图像传感器阵列捕捉图像由定时模块驱动,在一个实施例中,定时模块能够基本上同时暴露阵列中的所有像素。 像素被共同激活以将入射光光转换为电荷的时间限定了传感器阵列的曝光时段。 在一个实施例中,曝光周期的至少一部分在照明周期期间发生。