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    • 4. 发明公开
    • Procédé de détection d'un marqueur apposé sur la surface d'un objet et système de mise en oeuvre
    • 方法上的对象固定标记物的表面实施该方法的检测及系统
    • EP2649560A2
    • 2013-10-16
    • EP11811076.6
    • 2011-12-09
    • Ubleam
    • GURDJOS, PierreCHARVILLAT, VincentBOURY, SamuelMEZZAROBBA, Olivier
    • G06K19/06G06K7/14
    • G06K7/1443G06K7/14G06K7/1417G06K7/1447G06K7/1452G06K7/1456G06K19/06037
    • The invention relates to a method for the detection of a marker affixed to the surface of an object, comprising the following operations: acquisition (40) of a photographic image (10) of a zone containing at least one marker (11); extraction of contours from the photographic image; detection of a marker-positioning contour from among the aforementioned contours, which corresponds to a set of confocal conics having a predetermined form; modelling of an image of the confocal conics in the form of a matrix comprising at least two symmetric matrices of order 3; analysis of said matrices in order to determine a perspective correction for the photographic image; detection, in the perspective-corrected photographic image, of an indexing element associated graphically with the positioning contour of the marker, and rotation-correction of the photographic image; detection, in the perspective- and rotation-corrected photographic image, of encoded data graphically associated with the positioning contour of the marker, and decoding (70) of said encoded data. The invention also relates to a marker-detection system using said method.
    • 一种用于固定到一个物体的表面的检测的标记物的方法,包括:获取含有至少一种标记物的区域的摄影图像; 提取的拍摄图像的轮廓; 检测来自上述轮廓中的标记物的定位轮廓,其对应于一组具有预定形状共焦二次曲线; 建模在具有3阶的至少两个对称矩阵的矩阵形式的共焦二次曲线的图像; 分析所述矩阵以确定性矿为摄影图像的透视校正; 检测,与标记的定位轮廓图形相关联的标定元件,和旋转校正的拍摄图像上的透视校正的拍摄图像中; 检测,在透视和旋转校正的拍摄图像,编码数据以图形与标记的定位轮廓相关联,并且编码数据进行解码。 由此描述使用该方法的标记检测系统。
    • 5. 发明公开
    • Barcode reader with edge detection enhancement
    • Strichcode-Leser mit Verbesserung der Kantenerfassung
    • EP2455889A1
    • 2012-05-23
    • EP11189182.6
    • 2011-11-15
    • Metrologic Instruments, Inc.Hand Held Products, Inc.
    • Germaine, GennadyXian, TaoFeng, ChenWang, YnjiunZhu, XiaoxunColavito, StephenBlake, Robert
    • G06K7/10G06K7/14
    • G06K7/10851G06K7/1452
    • An optical reader for decoding an encoded symbol character of a symbology includes a scan data signal processor having as an input a scan data signal encoding information representative of the encoded symbol character. The scan data signal processor includes a first time delay stage adapted to provide a primary phase waveform from the scan data signal, a second time delay stage adapted to provide an early phase waveform from the scan data signal, and a third time delay stage adapted to provide a delayed phase waveform from the scan data signal. The early phase waveform has a propagation delay less than the primary phase waveform, and the delayed phase waveform has a propagation delay greater than the primary phase waveform. The scan data signal processor further includes a peak window detection stage for generating a peak window timeframe when an amplitude of the primary phase waveform is greater than, less than, or equal to both an amplitude of the early phase waveform and the delayed phase waveform. The optical reader further includes a digitizer circuit adapted to accept, within the peak window timeframe, the scan data signal processor output.
    • 用于解码符号系统的编码符号字符的光学读取器包括扫描数据信号处理器,其具有编码表示编码符号字符的信息的扫描数据信号作为输入。 扫描数据信号处理器包括适于从扫描数据信号提供主相波形的第一时间延迟级,适于从扫描数据信号提供早期相位波形的第二时间延迟级,以及适于 从扫描数据信号提供延迟相位波形。 早期相位波形的传播延迟小于初级相位波形,延迟相位波形的传播延迟大于主相位波形。 扫描数据信号处理器还包括峰值窗口检测级,用于当主相波形的振幅大于,小于或等于早期相位波形和延迟相位波形的振幅时产生峰值窗口时间帧。 光学读取器还包括适于在峰值窗口时间帧内接收扫描数据信号处理器输出的数字转换器电路。
    • 6. 发明公开
    • Code type determining method and code boundary detecting method
    • 一种用于确定的代码和方法的类型,用于检测Kodegrenzen方法
    • EP2275968A1
    • 2011-01-19
    • EP10181345.9
    • 2004-09-30
    • Fujitsu Limited
    • Yamaguchi, NobayasuTakakura, HiroyukiChiba, HirotakaNoda, Tsugio
    • G06K7/14
    • G06K7/1452G06K7/14
    • A method detecting a boundary of two-dimensional code where data put into cells is arranged in a two-dimensional state, comprising: a first white successive length detecting step of scanning input image data, and detecting a successive length of white cells; a second white successive length detecting step of scanning the input image data in a direction which intersects with a first white successive length, and detecting a successive length of white cells, which has an intersection with the first white successive length, and exceeds a predetermined length; and a boundary detecting step of detecting an intersection of the first white successive length and a second white successive length as a code boundary position.
    • 的方法检测的二维代码的边界,其中数据被放入在二维状态下配置的细胞,其包含:第一连续白长度检测扫描输入的图像数据的步骤,以及检测白细胞的连续长度; 扫描在其与第一白色连续长度相交的方向上的输入图像数据,并检测白色细胞,其具有与第一白连续长度相交的连续长度的第二白色连续长度检测步骤,并且超过预定长度 ; 和边界检测第一白连续长度和第二连续白色长度作为代码边界位置的交叉点的检测的步骤。
    • 10. 发明公开
    • Optical scanners
    • 光学扫描器
    • EP0745951A3
    • 2001-03-28
    • EP96303984.7
    • 1996-05-31
    • SYMBOL TECHNOLOGIES, INC.
    • G06K7/10
    • G06K7/10851G06K7/10544G06K7/14G06K7/1452G06K7/1478
    • An optical scanning system is provided for producing a signal representative of a spatial distribution of indicia having different degrees of reflectivity to light, such as a bar code (14). The system includes an optical scanner (12) for scanning beam of light over the spatial distribution of indicia (14) and for producing an electrical signal corresponding to changes in the degree of reflectivity of the indicia. A digitizer (20), responsive to detections in a predetermined characteristic of the produced electrical signal is provided. The digitizer (20) converts the detections into digital words, such digital signals having a plurality of bits. The digitizer includes a timing generation circuit (42) for producing a pulse in response to each one of the detections with a time duration representative of the degree of reflectivity of the indicia as the beam of light. A decoder converts the time duration of the pulse into the digital word having a plurality of bits. An enhancement filter (30) is also disclosed. The enhancement filter (30) modifies pulses produced by a differentiator circuit (24) used in the scanner. Such modification includes increasing the rise time, and peak level of, the pulses produced by the differentiator circuit (24). The invention further relates to a method of reading an indicia where the electrical signal representative of the indicia is selectively sampled, the samples being analyzed to establish whether they will represent true data or noise, and signal collection, processing and sampling is then adjusted allowing more aggressive decoding techniques to be used. In another aspect, a non-linear edge strength digitizer is employed capable of decoding both poorly printed and high density bar codes. A matched filter for bar code symbol signals is also proposed; as there is no inherent synchronisation in the bar code signals, a peak or edge detector is used to trigger the system. An automatic deblurring signal processor also proposed wherein a first derivative of an input bar code signal is compared against a threshold range and, if no match is found, then parameters of the processor system are varied to increase the likelihood of a comparison being successful.