WO2012071729A1 - 图像采集装置 - Google Patents

图像采集装置 Download PDF

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Publication number
WO2012071729A1
WO2012071729A1 PCT/CN2010/079373 CN2010079373W WO2012071729A1 WO 2012071729 A1 WO2012071729 A1 WO 2012071729A1 CN 2010079373 W CN2010079373 W CN 2010079373W WO 2012071729 A1 WO2012071729 A1 WO 2012071729A1
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WO
WIPO (PCT)
Prior art keywords
light
image
banknote
image capture
capture device
Prior art date
Application number
PCT/CN2010/079373
Other languages
English (en)
French (fr)
Inventor
唐辉
魏星
成和建
鲍东山
Original Assignee
北京新岸线软件科技有限公司
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Application filed by 北京新岸线软件科技有限公司 filed Critical 北京新岸线软件科技有限公司
Priority to PCT/CN2010/079373 priority Critical patent/WO2012071729A1/zh
Publication of WO2012071729A1 publication Critical patent/WO2012071729A1/zh

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon

Definitions

  • the present invention relates to the field of optoelectronic technology and image technology, and more particularly to an image acquisition device for banknote identification. Background technique
  • banknote anti-counterfeiting technologies are mainly concentrated on special paper (including plastic paper) and anti-counterfeiting and printing.
  • Most of the existing banknote identification techniques use optical images or optical and chemical aids to identify optical images.
  • banknote discriminating technology is much more accurate than modern digital image processing technology in terms of observation effect, and it is difficult to achieve automated continuous operation.
  • a system for authenticating banknotes by digital image processing has emerged.
  • the system records a holographic optical image of the banknote and converts the feature image to be recognized into a basic digital signal that can be processed by the computer.
  • a vector signal or a graphics matrix that retains the graphical features of the banknote feature points and compresses the amount of data is formed.
  • the system can identify multiple security features on a single banknote, which can greatly enhance the identification of the altered currency. Summary of the invention
  • the technical problem to be solved by the present invention is to provide an image collecting apparatus for a bill discriminating system.
  • the image capture device includes a partially transparent carrier member that conforms to the banknote path; a light illumination member that projects light into the banknote for providing sufficient image capture during the image capture process Brightness; and, at least one image acquisition component that collects a banknote feature image through the light transmissive portion of the carrier member.
  • the image capture component is located on an opposite side of the transfer banknote. Wherein the light-irradiating member is located between the carrier member and the image-capturing member; and a portion of the light-irradiating member corresponding to the light-transmitting portion of the carrier member is transparent.
  • the light illuminating component has a plurality of illuminating elements.
  • the plurality of illuminating elements are hooked over the periphery of the transparent portion of the illuminating member.
  • the light emitting element is a light emitting diode LED.
  • the method further includes detecting means for detecting the conveyance of the banknote on the carrier member, and triggering the image capturing component to collect the image of the banknote every time a piece of the transferred banknote is detected .
  • the detecting component is an infrared sensing device.
  • the image capture component has two, placed perpendicular to the direction in which the banknote is being transported.
  • the image capture component is comprised of a CCD sensor and a fisheye lens, or a CMOS sensor and a fisheye lens.
  • the light transmissive portion of the carrier member is adapted to the shape and size of the banknote or to the shape and size of some or all of the feature points that need to be collected on the banknote.
  • FIG. 1 is a schematic diagram of an example of an image capture device provided by the present invention.
  • FIG. 2 is a schematic diagram of another example of an image capture device provided by the present invention.
  • Figure 3 is a plan view of the image capture device shown in Figure 1;
  • Figure 4 is a schematic view showing the position of a light-emitting element in the present invention.
  • Fig. 5 is a structural schematic view showing the combination of the light-irradiating member and the carrier member in the present invention. detailed description
  • Fig. 1 shows an example structure of an image pickup device, which comprises a carrier member 01 for attaching a banknote path, a light-illuminating member 02 for projecting light to a banknote, for collecting a feature image of a banknote.
  • the image pickup unit 03 and a casing 04 for encapsulating the carrier member 01, the light irradiation member 02, and the image pickup unit 03.
  • the direction of the arrow in Figure 1 is the direction in which the banknotes are transported, that is, the direction in which the banknotes are drawn.
  • the banknotes are conveyed on one side of the carrier member 01, and the illumination member 02 and the image pickup member 03 are mounted on the other side of the carrier member 01, that is, on the opposite side to which the banknotes are transported.
  • the light illuminating part 02 is located between the carrying part 01 and the image collecting part 03, which is more conducive to providing sufficient brightness during image acquisition.
  • the 7-load member 01 is composed of a light transmitting portion and an opaque portion, as shown in FIG.
  • a preferred way is that the light transmissive portion of the carrier member 01 is adapted to the shape and size of the banknote.
  • the carrier member 01 is made of glass, acrylic or the like. The plate is formed, and an opaque portion is formed by plating a light-blocking film layer around the transparent plate.
  • the carrier member 01 may be composed of a transparent plate made of glass, acrylic or the like and a non-transparent substrate.
  • the shape and size of the light transmitting portion of the bearing member 01 should be determined according to actual needs.
  • the light transmitting portion of the bearing member 01 is adapted to the shape and size of the banknote, or is required to be collected on the banknote.
  • the shape and size of some or all of the feature points are adapted.
  • the light-irradiating member 02 corresponds to the carrier member 01 and is composed of a transparent portion and a non-permeable portion. A portion of the light-irradiating member 02 corresponding to the light-transmitting portion of the carrier member 01 is transparent, and the remaining portion is a non-permeable portion.
  • the image pickup unit 03 can collect an image of the banknote from the light transmitting portion of the carrier member 01 by the light transmitting portion of the light illuminating member 02.
  • the light-irradiating member 02 has a plurality of light-emitting elements 021 distributed around the periphery of the transparent portion of the light-irradiating member 02.
  • the light-emitting element 021 Since the light-emitting element 021 is distributed on the periphery of the transparent portion of the light-irradiating part 02, it is correspondingly located below the opaque portion of the 7-carrier part 01, so that the light of the light-emitting element 021 can be irradiated in parallel to the light-transmitting portion of the bearing member 01. Without forming a spot, affecting the quality of image acquisition.
  • the light-emitting elements 021 are evenly distributed around the periphery of the transparent portion of the light-irradiating part 02, uniform illumination can be provided, which is advantageous for the quality of image acquisition. In practical applications, the position of the light-emitting element 021 should be as close as possible to the carrier member 01.
  • a preferred method is that the light-emitting element 021 is in close contact with one side of the 7-load member 01, as shown in FIG.
  • the loss of light energy can be reduced, and the light can be illuminated as much as possible in the light-transmitting region; on the other hand, the side close to the banknote can minimize the area where the spot is formed, so Use the light-transmitting area to obtain an image that is as large as possible.
  • the light-emitting element 021 can be, but is not limited to, a light-emitting diode LED.
  • the image acquisition unit 03 may be composed of a CCD sensor and a fisheye lens, a CCD sensor and a non-fisheye lens, or may be composed of a CMOS sensor and a fisheye lens, or may be composed of a CMOS sensor and a non-fisheye lens.
  • Fig. 5 shows an example of mounting of the light-irradiating member 02 and the carrier member 01.
  • the illuminating element 021 is mounted around the lower surface of the glass surface and, by its relative position to the glass surface, prevents the spot from appearing within the field of view of the CMOS or CCD camera.
  • the light-emitting elements 021 can be individually controlled or lighted at the same time.
  • the frequency of counting money inside the money counter, the sorting machine or the ATM machine is about 10-20hz. That is, the number of banknotes per second is 10-20. Accordingly, the speed at which the banknotes are transported on the carrier member 01 is 10-20 sheets per second.
  • the image capturing component 03 does not adopt the triggering photographing mode, it must ensure that the no-trigger shooting frame rate is much larger than the counting frequency, and one of the several images captured by each banknote is selected for processing, which gives positioning and back-end processing. Bringing a huge complexity; if the trigger photo mode is adopted, it only needs to ensure that the trigger shooting frequency is equal to the counting frequency, which ensures that the current frame is a processable image, and greatly reduces the algorithms such as backend positioning and feature extraction. the complexity.
  • Fig. 2 shows another example structure of the image pickup device.
  • the image collecting apparatus shown in Fig. 2 adds a detecting unit 04 for detecting the conveyance of the bill on the carrying unit 01. After each detected banknote is detected, the detecting unit 04 will trigger the image capturing unit 03 to collect the banknote image once, thereby realizing the triggering of the photographing mode.
  • sensing component There are a variety of ways to implement the sensing component.
  • a preferred method is to use an infrared sensing device to detect whether a banknote has entered the carrier member 01 or to use other sensors that are sensitive to the position of the banknote.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Description

图像采集装置
技术领域
本发明涉及光电技术及图像技术领域， 尤其涉及一种用于纸币鉴别 的图像采集装置。 背景技术
目前各国的纸币防伪技术主要集中于特殊纸张（包括塑料纸）和防 伪制版及印刷。 现有的纸币鉴别技术大多是利用人眼、 或借助光学、 化 学辅助手段来识别光学图像。 这样的纸币鉴别技术较现代数字图像处理 技术的精度， 在观测效果上有极大的差别， 而且难于实现自动化连续操 作。 目前， 出现了一种通过数字图像处理鉴别纸币真伪的系统。 该系统 对纸币的全息光学图像进行摄录， 将待辨认的特征图像转化成可供计算 机处理的基本数字信号。 通过整形和采样技术的图形处理， 形成既保留 纸币特征点的图形特征， 又压缩数据量的向量信号或图形矩阵。 该系统 可以对一张纸币上的多个防伪特征进行鉴别， 从而可以大大提高对变造 币的鉴别效果。 发明内容
本发明所要解决的技术问题是提供一种用于纸币鉴别系统的图像采 集装置。
在一些可选的实施例中， 所述图像采集装置包括一个贴合纸币走钞 路径的部分透光的承载部件； 一个向纸币投射光线的光照射部件， 用于 在图像采集过程中提供足够的亮度； 和， 至少一个通过所述承载部件的 透光部分采集纸币特征图像的图像采集部件。
在一些可选的实施例中，所述图像采集部件位于传送纸币的相对侧。 其中， 所述光照射部件位于所述承载部件和图像采集部件之间； 所 述光照射部件上对应于所述 载部件的透光部分的部分通透。
在一些可选的实施例中， 所述光照射部件具有多个发光元件。
在一些可选的实施例中， 所述多个发光元件均勾地分布在所述光照 射部件的通透部分的外围。
在一些可选的实施例中， 所述发光元件是发光二极管 LED。 在一些可选的实施例中， 还包括检测部件， 用于对所述^载部件上 的纸币传送进行检测， 并在每检测到一张传送的纸币后触发所述图像采 集部件采集一次纸币图像。
在一些可选的实施例中， 所述检测部件为红外感应装置。
在一些可选的实施例中， 所述图像采集部件有 2个， 垂直于纸币传 送的方向放置。
在一些可选的实施例中， 所述图像采集部件由 CCD传感器和鱼眼 镜头组成， 或由 CMOS传感器和鱼眼镜头组成。
在一些可选的实施例中， 所述 7|载部件的透光部分与纸币的形状和 尺寸相适应， 或与纸币上所需要采集的部分或全部特征点的形状和尺寸 相适应。 附图说明
图 1是本发明提供的图像采集装置的一个实例示意图；
图 2是本发明提供的图像采集装置的另一个实例示意图；
图 3是图 1所示的图像采集装置的俯视图；
图 4是本发明中发光元件位置的一个示意图；
图 5是本发明中光照射部件与承载部件结合的一个结构示意图。 具体实施方式
图 1示出了图像采集装置的一种实例结构， 该装置包括一个贴合纸 币走钞路径的 载部件 01 ,—个向纸币投射光线的光照射部件 02,—个 用于采集纸币特征图像的图像采集部件 03和一个用于封装承载部件 01、 光照射部件 02和图像采集部件 03的外壳 04。 图 1中箭头的指向为纸币 的传送方向， 也就是走钞方向。 纸币在承载部件 01的一侧被传送， 光照 射部件 02和图像采集部件 03被安装在承载部件 01的另一侧，也就是传 送纸币的相对侧。 光照射部件 02位于承载部件 01 和图像采集部件 03 之间， 这样更利于在图像采集过程中提供足够的亮度。
7 载部件 01由透光部分和不透光部分组成，如图 3所示。一种推荐 的方式是，承载部件 01的透光部分与纸币的形状和尺寸相适应。一种可 选的方式是，承载部件 01由用玻璃、 丙烯酸树脂或其类似物做成的透明 板形成， 并通过在所述透明板的周围镀覆阻光膜层形成不透光部分。 另 一种可选的方式是，承载部件 01由用玻璃、 丙烯酸树脂或其类似物做成 的透明板和非透明的基材组成。
承载部件 01的透光部分的形状和尺寸应根据实际需求而定，一种可 选的方式是，承载部件 01的透光部分与纸币的形状和尺寸相适应，或者 与纸币上所需要采集的部分或全部特征点的形状和尺寸相适应。
光照射部件 02与 7|载部件 01相对应， 由通透部分和非通透部分组 成。 光照射部件 02上对应于承载部件 01的透光部分的部分通透， 其余 部分为非通透部分。 这样， 图像采集部件 03就可以通过光照射部件 02 的通透部分， 从承载部件 01的透光部分采集纸币的图像。 如图 3所示， 光照射部件 02具有多个发光元件 021 , 分布在光照射部件 02的通透部 分的外围。 发光元件 021由于分布在光照射部件 02的通透部分的外围， 因此相应地位于 7 载部件 01的不透光部分的下方，这样可以使发光元件 021的光线平行照射承载部件 01的透光部分， 而不会形成光斑， 影响图 像采集的质量。当发光元件 021均勾地分布在光照射部件 02的通透部分 的外围时， 可以提供均匀的光照， 更利于图像采集的质量。 在实际应用 时， 发光元件 021的位置应尽量靠近承载部件 01。 一种较好的方式是， 发光元件 021紧贴 7 载部件 01的一侧， 如图 4所示。 这样， 一方面可以 减少光能量的损失， 将光线尽可能多地照亮透光区域； 另一方面， 紧贴 走钞面得一侧， 可以使形成光斑的区域尽量减小， 所以能够最大限度地 利用透光区域获得尽可能大幅面的图像。 其中， 发光元件 021可以但不 限于是发光二极管 LED。
图像采集部件 03可以由 CCD传感器和鱼眼镜头组成， CCD传感器 和非鱼眼镜头组成， 或者可以由 CMOS传感器和鱼眼镜头组成， 也可以 由 CMOS传感器和非鱼眼镜头组成。
图 5示出了光照射部件 02与承载部件 01的一个安装实例。 发光元 件 021安装在紧贴玻璃表面的下方的四周， 并且， 通过与玻璃表面的相 对位置， 避免光斑出现在 CMOS或者 CCD摄像头的视场范围内。 发光 元件 021可以单独控制， 也可以同时点亮。
另夕卜， 点钞机、 清分机或者 ATM机内部点钞的频率约为 10-20hz, 即每秒钟点钞数量为 10-20张。相应地， 在承载部件 01上传送纸币的速 度为每秒钟 10-20张。 图像采集部件 03如果不采用触发拍照模式， 则必 须保证无触发拍摄帧率远大于点钞频率， 在每张纸币拍到的若干张图像 中挑选一张进行处理， 这就给定位和后端处理带来了巨大的复杂度； 如 果采用触发拍照模式， 则只需要保证触发拍摄频率等于点钞频率， 即可 保证当前帧即为可处理图像， 并且极大地降低了后端定位、 特征提取等 算法复杂度。
图 2示出了图像采集装置的另一种实例结构。 与图 1所示的图像采 集装置相比， 图 2所示的图像采集装置增加了检测部件 04, 用于对承载 部件 01上的纸币传送进行检测。在每检测到一张传送的纸币后，检测部 件 04都将触发图像采集部件 03采集一次纸币图像， 从而实现触发拍照 模式。
检测部件的实现方式有多种可供选择， 一种较好的方式是采用红外 感应装置检测是否有纸币进入承载部件 01 ,或者采用其他对纸币位置敏 感的传感器。
在上述实施例中， 虽然图像采集装置中的图像采集部件 03 只有一 个， 但是本领域技术人员完全可以知道， 可以在所述图像采集装置中安 装多个图像采集部件 03。 一种可选的方式是， 在所述图像采集装置中， 垂直于纸币传送的方向放置 2个图像采集部件 03。
根据所述公开的实施例， 可以使得本领域技术人员能够实现或者 使用本发明。 对于本领域技术人员来说， 这些实施例的各种修改是显 而易见的， 并且这里定义的总体原理也可以在不脱离本发明的范围和 主旨的基础上应用于其他实施例。 以上所述的实施例仅为本发明的较 佳实施例而已， 并不用以限制本发明， 凡在本发明的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围 之内。
显然， 在不偏离本发明的实质和范围的前提下， 本发明可以有许多 变化和等同替换，这些变化和等同替换均落入权利要求的保护范围之内。

Claims

权 利 要 求
1、 一种图像采集装置， 其特征在于， 包括：
一个贴合纸币走钞路径的部分透光的 7?载部件；
一个向纸币投射光线的光照射部件， 用于在图像采集过程中提供足 够的亮度； 和，
至少一个通过所述承载部件的透光部分采集纸币特征图像的图像采 集部件。
2、如权利要求 1所述的图像采集装置， 其特征在于， 所述图像采集 部件位于传送纸币的相对侧。
3、如权利要求 2所述的图像采集装置， 其特征在于， 所述光照射部 件位于所述承载部件和图像采集部件之间； 所述光照射部件上对应于所 述承载部件的透光部分的部分通透。
4、如权利要求 3所述的图像采集装置， 其特征在于， 所述光照射部 件具有多个发光元件。
5、如权利要求 4所述的图像采集装置， 其特征在于， 所述多个发光 元件均勾地分布在所述光照射部件的通透部分的外围。
6、如权利要求 4所述的图像采集装置， 其特征在于， 所述发光元件 是发光二极管 LED。
7、如权利要求 1至 6任一项所述的图像采集装置， 其特征在于， 还 包括检测部件， 用于对所述承载部件上的纸币传送进行检测， 并在每检 测到一张传送的纸币后触发所述图像采集部件采集一次纸币图像。
8、如权利要求 7所述的图像采集装置， 其特征在于， 所述检测部件 为红外感应装置。
9、如权利要求 1至 6任一项所述的图像采集装置， 其特征在于， 所 述图像采集部件有 2个， 垂直于纸币传送的方向放置。
10、 如权利要求 1至 6任一项所述的图像采集装置， 其特征在于， 所述图像采集部件由 CCD传感器和鱼眼镜头组成， 或由 CMOS传感器 和鱼眼镜头组成。
11、 如权利要求 1至 6任一项所述的图像采集装置， 其特征在于， 所述^载部件的透光部分与纸币的形状和尺寸相适应， 或与纸币上所需 要采集的部分或全部特征点的形状和尺寸相适应。
PCT/CN2010/079373 2010-12-02 2010-12-02 图像采集装置 WO2012071729A1 (zh)

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JPH07311866A (ja) * 1994-05-19 1995-11-28 Copal Co Ltd 偽造鑑別装置
JPH08263717A (ja) * 1995-03-24 1996-10-11 Glory Ltd 紙幣識別装置
JPH11250308A (ja) * 1998-03-03 1999-09-17 Copal Co Ltd 紙葉類反射センサ
JP2005033589A (ja) * 2003-07-07 2005-02-03 Nidec Copal Corp 撮像装置
CN1725251A (zh) * 2004-10-28 2006-01-25 黄子志 鉴真机
CN101201945A (zh) * 2007-12-21 2008-06-18 中钞长城金融设备控股有限公司 纸币识别模块
CN101308540A (zh) * 2008-05-04 2008-11-19 梓昆科技（杭州）有限公司 接触式多光谱图像传感器
CN201222276Y (zh) * 2008-03-07 2009-04-15 北京科创融鑫科技有限公司 基于机器视觉的钱币卡把装置及钱币透明包装袋
CN101976474A (zh) * 2009-08-31 2011-02-16 北京新岸线软件科技有限公司 图像采集装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07311866A (ja) * 1994-05-19 1995-11-28 Copal Co Ltd 偽造鑑別装置
JPH08263717A (ja) * 1995-03-24 1996-10-11 Glory Ltd 紙幣識別装置
JPH11250308A (ja) * 1998-03-03 1999-09-17 Copal Co Ltd 紙葉類反射センサ
JP2005033589A (ja) * 2003-07-07 2005-02-03 Nidec Copal Corp 撮像装置
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CN101201945A (zh) * 2007-12-21 2008-06-18 中钞长城金融设备控股有限公司 纸币识别模块
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