公开(公告)号：US20040155113A1

公开(公告)日：2004-08-12

申请号：US10628441

申请日：2003-07-29

Applicant: Kabushiki Kaisha Toshiba

Inventor： Taeko I. Urano ,  Kenji Sano ,  Hideo Nagai ,  Tomokazu Domon ,  Hironori Fukuda

IPC: G06K019/06

CPC classification number: G06K7/14

Abstract: An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation unit for binarizing a detection signal from the detecting unit. The arithmetic operation unit calculates a differential coefficient of the detection signal, that corresponds to a position on the sample. On the basis of upper and lower threshold values set for the differential coefficient, the arithmetic operation unit determines a maximum value of the differential coefficient in a region exceeding the upper threshold value and a minimum value of the differential coefficient in a region smaller than the lower threshold value. The arithmetic operation unit binarizes the detection signal by using the maximum or minimum value as a loading or trailing edge of a binary function.

Abstract translation: 不可见符号读取装置包括加热单元，用于加热形成在样本上的不可见符号，并且包含加热时发出红外光的材料;检测单元，用于检测从不可见符号发射的红外光;以及算术运算单元， 来自检测单元的检测信号。 算术运算单元计算与样本上的位置对应的检测信号的微分系数。 基于为差分系数设定的上限阈值和下限阈值，算术运算单元确定超过上限阈值的区域中的微分系数的最大值和小于下限值的区域中的微分系数的最小值 阈值。 算术运算单元通过使用最大值或最小值作为二进制函数的加载或后沿来对检测信号进行二值化。

公开(公告)号：US20040046032A1

公开(公告)日：2004-03-11

申请号：US10657215

申请日：2003-09-09

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Taeko I. Urano ,  Kenji Sano ,  Hideo Nagai ,  Tomokazu Domon ,  Hironori Fukuda

IPC: G06K007/10

CPC classification number: G06K7/14

Abstract: An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation unit for binarizing a detection signal from the detecting unit. The arithmetic operation unit calculates a differential coefficient of the detection signal, that corresponds to a position on the sample. On the basis of upper and lower threshold values set for the differential coefficient, the arithmetic operation unit determines a maximum value of the differential coefficient in a region exceeding the upper threshold value and a minimum value of the differential coefficient in a region smaller than the lower threshold value. The arithmetic operation unit binarizes the detection signal by using the maximum or minimum value as a leading or trailing edge of a binary function.

Abstract translation: 不可见符号读取装置包括加热单元，用于加热形成在样本上的不可见符号，并且包含加热时发出红外光的材料;检测单元，用于检测从不可见符号发射的红外光;以及算术运算单元， 来自检测单元的检测信号。 算术运算单元计算与样本上的位置对应的检测信号的微分系数。 基于为差分系数设定的上限阈值和下限阈值，算术运算单元确定超过上限阈值的区域中的微分系数的最大值和小于下限值的区域中的微分系数的最小值 阈值。 算术运算单元通过使用最大值或最小值作为二进制函数的前沿或后沿来对检测信号进行二值化。

公开(公告)号：US20010020677A1

公开(公告)日：2001-09-13

申请号：US09753763

申请日：2001-01-02

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Taeko I. Urano ,  Kenji Sano ,  Hideo Nagai ,  Tomokazu Domon ,  Hironori Fukuda

IPC: G06K007/12 ,  G01J005/02

CPC classification number: G06K7/14

Abstract: An invisible symbol reading apparatus includes a heating unit for heating an invisible symbol formed on a sample and containing a material which emits infrared light when heated, a detecting unit for detecting infrared light emitted from the invisible symbol, and an arithmetic operation unit for binarizing a detection signal from the detecting unit. The arithmetic operation unit calculates a differential coefficient of the detection signal, that corresponds to a position on the sample. On the basis of upper and lower threshold values set for the differential coefficient, the arithmetic operation unit determines a maximum value of the differential coefficient in a region exceeding the upper threshold value and a minimum value of the differential coefficient in a region smaller than the lower threshold value. The arithmetic operation unit binarizes the detection signal by using the maximum or minimum value as a leading or trailing edge of a binary function.