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    • 2. 发明申请
    • Integer square root algorithm for use in digital image processing
    • 用于数字图像处理的整数平方根算法
    • US20070106719A1
    • 2007-05-10
    • US11269013
    • 2005-11-08
    • James BaileyDavid CrutchfieldZachary Fister
    • James BaileyDavid CrutchfieldZachary Fister
    • G06F7/552
    • G06F7/5525
    • An integer square root calculation technique determines the precise root of an input value to determine the distance between data points such as pixels in a digital image. The technique avoids division and floating point multiplication steps. An initial root estimate may be used as a seed value beginning an iterative convergence towards the final solution. A scaled error may be determined by bit shifting an error difference between a square of the root estimate and the input value. Depending on whether the scaled error satisfies a predetermined condition, the current square root estimate may be adjusted by a bit-shifted fraction of the scaled error and the scaled error is then recalculated. In certain instances, a final adjustment to the root estimate may be implemented to yield the precise square root value. Ultimately, the final root estimate may be assigned to an output value representing the desired distance.
    • 整数平方根计算技术确定输入值的精确根,以确定数字图像之间的数据点(例如像素)之间的距离。 该技术避免了分割和浮点乘法步骤。 初始根估计可以用作开始向最终解的迭代收敛的种子值。 可以通过比特移位根估计的平方和输入值之间的误差来确定缩放误差。 根据缩放误差是否满足预定条件,可以通过缩放误差的位移分数来调整当前平方根估计,然后重新计算缩放误差。 在某些情况下,可以实施对根估计的最终调整以产生精确的平方根值。 最终,可以将最终根估计值分配给表示期望距离的输出值。
    • 5. 发明申请
    • Method and apparatus for improving color registration in contact-image-sensor scanners
    • 用于改善接触图像传感器扫描仪中颜色配准的方法和装置
    • US20060114521A1
    • 2006-06-01
    • US11001965
    • 2004-12-01
    • James BaileyJames BushJoseph Yackzan
    • James BaileyJames BushJoseph Yackzan
    • H04N1/04
    • H04N1/40006H04N1/40056H04N1/484
    • A method, and a document scanning apparatus employing the method, of scanning with a light source. The method comprises the acts of determining a calibration time of the light source and light sensor in a scanning unit, adjusting an activation time for the light source based on the calibration time, scaling a clock signal based on the activation time, and activating the light source based on the scaled clock signals. Where a red, green and blue LED light source is used, the longest of the activation times of the LEDs is used for the scaling of the clock signals. In another embodiment, the time between the start of the activation of last LED scan on a previous scan line and the start of activation of the first LED on the subsequent scan line is adjusted to maintain the predetermined resolution used for the scan.
    • 一种使用该方法的方法和文件扫描装置,用光源进行扫描。 该方法包括确定扫描单元中的光源和光传感器的校准时间的动作,基于校准时间调整光源的激活时间,基于激活时间缩放时钟信号,以及激活光 源基于缩放的时钟信号。 在使用红色,绿色和蓝色LED光源的地方,LED的最长激活时间用于缩放时钟信号。 在另一个实施例中,调整在先前扫描线上的最后LED扫描的开始激活与随后扫描线上的第一LED的启动开始之间的时间,以保持用于扫描的预定分辨率。
    • 6. 发明申请
    • System and method for high-performance scanner calibration
    • 用于高性能扫描仪校准的系统和方法
    • US20060001921A1
    • 2006-01-05
    • US10883427
    • 2004-06-30
    • James BaileyCurt BreswickDavid CrutchfieldJoseph Yackzan
    • James BaileyCurt BreswickDavid CrutchfieldJoseph Yackzan
    • H04N1/46
    • H04N1/401H04N5/361H04N5/3651
    • The present invention is directed to a system and method for reducing the memory requirement for offset and gain calibration to relieve the size/performance bottleneck in scanner systems. The resulting methodology produces visually equivalent scanned results with a substantial increase in performance, which results in a shorter amount of time required to output a first copy in, for example, an all-in-one device. Since the calibration step is often the bottleneck in scanner performance, this method noticeably speeds up scan and copy time. Implementing the decompression in hardware requires a minimal amount of hardware overhead and complexity. Thus, this method has a minimal impact on the size and cost of the scanner controller (e.g., an ASIC—application specific integrated circuit). Since compression only takes place at most once per scan, this added step has no significant impact on the overall scan time. By allowing dynamic grouping of pixels using a single calibration packet, the quality of the compensation can be optimized with the size of the compensation data being minimized. Adding the ability to shift the compressed deviation stored in the calibration packet, the range of the pixel-to-pixel deviation can be increased without impacting the size of the calibration data. This flexibility makes this invention applicable to future image sensors that may have widely varying deviations in pixel-to-pixel offset and gain values.
    • 本发明涉及用于减少偏移和增益校准的存储器需求以减轻扫描器系统中的尺寸/性能瓶颈的系统和方法。 所得到的方法产生视觉上等效的扫描结果,性能显着增加,这导致在例如一体式设备中输出第一副本所需的更短的时间量。 由于校准步骤通常是扫描仪性能的瓶颈,因此该方法显着加快了扫描和复制时间。 在硬件中实现解压缩需要最少的硬件开销和复杂性。 因此,该方法对扫描仪控制器(例如,ASIC专用集成电路)的尺寸和成本具有最小的影响。 由于每次扫描最多只能进行一次压缩,因此添加的步骤对整个扫描时间没有显着影响。 通过允许使用单个校准分组对像素进行动态分组,可以使补偿数据的大小最小化来优化补偿的质量。 增加移动存储在校准包中的压缩偏差的能力,可以增加像素到像素偏差的范围而不影响校准数据的大小。 这种灵活性使得本发明适用于未来可能在像素到像素偏移和增益值中具有广泛变化的偏差的图像传感器。
    • 9. 发明申请
    • Fluid couplings
    • 流体联轴器
    • US20070017582A1
    • 2007-01-25
    • US11185480
    • 2005-07-20
    • Alexander ChenvainuThomas ChristmanJames Bailey
    • Alexander ChenvainuThomas ChristmanJames Bailey
    • F16L37/23
    • A61C17/36A61C1/0061A61C17/222A61C17/28Y10T137/87965
    • Fluid couplings are provided for devices that include a flow path having two or more separable portions. Devices including such couplings are also provided, for example, a device including: first and second separable portions; a conduit, within the first portion, defining a flow path for fluid flow between the first portion and the second portion, the conduit having an open terminal end; a valve, within the first portion, including a deformable member configured to cover the terminal end thereby sealing the first portion when the first and second portions are separated; and a member, extending from the second portion, configured to cause the deformable member to deflect so as to expose the terminal end when the first and second portions are connected.
    • 为包括具有两个或多个可分离部分的流动路径的装置提供流体联轴器。 还提供了包括这种联接器的装置,例如,一种装置,包括:第一和第二可分离部分; 在第一部分内的导管限定用于在第一部分和第二部分之间的流体流动的流动路径,导管具有敞开的终端; 第一部分内的阀,包括构造成覆盖终端的可变形构件,从而当第一和第二部分分离时密封第一部分; 以及从第二部分延伸的构件,其构造成使得可变形构件偏转,以便当第一和第二部分连接时露出终端。