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    • 4. 发明授权
    • Method and system for automatically calibrating a color-based machine
vision system
    • 自动校准基于颜色的机器视觉系统的方法和系统
    • US6016161A
    • 2000-01-18
    • US53595
    • 1998-04-01
    • David A. Robinson
    • David A. Robinson
    • G01J3/50G01J5/48G01J5/60G06T1/00H04N9/04H04N9/73H04N17/00H04N17/02
    • H04N9/735H04N17/002
    • A calibration algorithm is provided for calibrating a machine vision system including a color camera, a framegrabber and an illumination source wherein subsequently acquired images are processed on a pixel-by-pixel basis. After framegrabber offsets are measured to obtain initial or offset calibration data, the camera is pointed at a target monotone patch of known reflectance such as pure white and the camera outputs for red, green and blue are determined while observing the monotone patch to obtain spatial calibration data. The gain for each of the output channels of the color camera is automatically determined from the initial calibration data. Applying the three gain factors to a subsequent image on the pixel-by-pixel basis allows one to end up with a color-corrected image without incurring any time performance penalty. At any time during an inspection process, a small area of white reflectance can be observed. The resulting dynamic white calibration data is used to correct for any medium to long term temporal variation in imaging conditions.
    • 提供校准算法用于校准包括彩色相机,帧格局和照明源的机器视觉系统,其中随后获取的图像在逐像素的基础上被处理。 测量帧搜索器偏移量以获得初始或偏移校准数据后,摄像机将指向已知反射率的目标单调补丁(如纯白色),并在观察单色补片时确定红色,绿色和蓝色的摄像机输出,以获得空间校准 数据。 彩色摄像机的每个输出通道的增益从初始校准数据自动确定。 在逐个像素的基础上将三个增益因子应用于后续图像允许最终得到颜色校正图像,而不会导致任何时间性能损失。 在检查过程中的任何时间,可以观察到小面积的白色反射率。 所得到的动态白色校准数据用于校正成像条件中的任何中长期时间变化。
    • 5. 发明授权
    • Method and system for detecting errors in a sample image
    • 用于检测样本图像中的错误的方法和系统
    • US5969753A
    • 1999-10-19
    • US65973
    • 1998-04-24
    • David A. Robinson
    • David A. Robinson
    • G06T1/00G06K9/62G06T7/00H04N7/18
    • G06T7/001G06K9/6255
    • A method and system are described for use at a machine vision station to correctly identify errors within a sample image of an object by means of a probability image where a value of each pixel of the probability image is a probability. The probability image is created from a mean template image and a standard deviation image, both of which are created from a plurality of reference images of the object. The probability image is processed to detect the errors in the sample image independent of the values of the pixels which make up the sample image. Two different techniques are described for creating the probability image utilizing mean template, sample and standard deviation pixel values.
    • 描述了一种在机器视觉站上使用的方法和系统,通过概率图像中的概率图像的每个像素的值是概率来正确地识别对象的样本图像内的错误。 从平均模板图像和标准偏差图像创建概率图像,两者都是从对象的多个参考图像创建的。 处理概率图像以独立于组成样本图像的像素的值来检测样本图像中的误差。 描述了使用平均模板,样本和标准偏差像素值来创建概率图像的两种不同技术。
    • 6. 发明授权
    • Method and system for automatically monitoring the colors of an object
at a vision station
    • 用于自动监视视觉站物体的颜色的方法和系统
    • US5764386A
    • 1998-06-09
    • US591027
    • 1996-01-25
    • David A. Robinson
    • David A. Robinson
    • H04N9/64H04N1/23H04N1/48H04N1/60H04N1/46G03F3/08G03F3/10
    • H04N1/6033
    • Color balance of a sample image is compared with a previously learned template image utilizing an appropriately programmed machine vision system including a color camera at a vision station. The sample image, preferably captured from a web scanner attached directly to an offset printing machine, is compared with a previously generated "known good" template image. This comparison process produces four correction factors which are the ratios between the amount of each of four colored inks in the template image to that in the sample image. The four colored inks may be cyan, magenta, yellow, and black inks but inks of other colors could also be used. These correction factors can either be presented to an operator to manually adjust the machine or else used in an automatic feedback loop of a controller of the machine, thereby maintaining consistent image quality.
    • 使用适当编程的机器视觉系统将样本图像的色彩平衡与先前学习的模板图像进行比较,所述机器视觉系统包括在视觉站处的彩色相机。 将优选地从直接附着在胶版印刷机上的卷筒纸扫描仪捕获的样品图像与先前生成的“已知良好”模板图像进行比较。 该比较过程产生四个校正因子,其是模板图像中的四种有色油墨中的每一种与样品图像中的每一种之间的比率。 四色油墨可以是青色,品红色,黄色和黑色油墨,但也可以使用其他颜色的油墨。 这些校正因子可以呈现给操作者来手动调节机器,或者在机器的控制器的自动反馈回路中使用,从而保持一致的图像质量。
    • 9. 发明授权
    • Fishing rod cover
    • 钓鱼竿盖
    • US5293711A
    • 1994-03-15
    • US939654
    • 1992-09-03
    • David A. Robinson
    • David A. Robinson
    • A01K97/08
    • A01K97/08
    • An elongate flexible tube having an entrance opening is arranged to receive a fishing rod therewithin, with the entrance opening including a drawstring to effect securement of the fishing rod cover to the associated fishing rod. A closed second end spaced from the opened first end includes an annular array of rigid support loops rotatably mounted through the wall of the tube to support fishing components therewithin, with a pocket member mounted between the first end and second end arranged for securement of fishing accessories. Overlying flexible flaps receive and secure fishing rod hooks in a secure relationship preventing their access to individuals but convenient for use as required.
    • 具有入口的细长柔性管被布置成在其中容纳钓鱼杆,入口开口包括拉绳,以将钓鱼竿盖固定到相关联的钓竿上。 与打开的第一端间隔开的封闭的第二端包括可旋转地安装在管的壁上以支撑其中的钓鱼部件的刚性支撑环的环形阵列,其中安装在第一端和第二端之间的袋状构件被设置用于固定钓鱼配件 。 覆盖的柔性襟翼以安全的关系接收和固定钓鱼钩钩,防止他们进入个人,但是根据需要方便使用。
    • 10. 发明授权
    • Fish guiding assembly and method utilizing same
    • 鱼导引组件及其使用方法
    • US5263833A
    • 1993-11-23
    • US49832
    • 1993-04-19
    • David A. RobinsonCharles P. Ruggles
    • David A. RobinsonCharles P. Ruggles
    • E02B8/08
    • E02B8/085
    • A fish guiding assembly for use adjacent to dams and the like to channel fish into a safe passage includes an elongated buoyant frame including upper and lower elongated horizontally extending frame members, and a multiplicity of vertically extending louver slats of synthetic resin horizontally spaced apart and angularly oriented relative to the longitudinal axis of said frame. Upper and lower slat mounting members extend horizontally along the length of the frame and are supported thereby, and engage the slats adjacent their upper and lower ends to retain them in angular orientation. The upper ends of the louver slats are engaged to maintain them in the mounting members.
    • 用于与水坝等相邻使用以将鱼引入安全通道的鱼导引组件包括细长的浮力框架,其包括上和下细长的水平延伸的框架构件,以及多个垂直延伸的合成树脂的百叶窗板条,水平间隔开并成角度地 相对于所述框架的纵向轴线定向。 上下板条安装构件沿着框架的长度水平延伸并且由此支撑,并且与其上端和下端相邻的板条接合以将其保持在角度定向。 百叶窗板条的上端接合以将它们保持在安装构件中。