A License Plate Recognition and Speed Detection System - Index of

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Light Source Video Camera Laser Trigger Computer Fig. 1 General License Plate Recognition System 8
III.A. LPR Light Source There are several commercially available light sources on the market today that provide the characteristics required by license plate recognition systems. A good example is the Extreme UF500 infrared illuminator (specs are given in Appendix B). Some commercially available products include both the light source and video camera in one single unit. A good example is EagleVision’s Reg-L1 License Plate capture camera (specs are given in Appendix B). Light source characteristics that are desirable for license plate recognition (LPR) are described in the following paragraphs. The light source should be physically located near the video camera. License plates are coated with reflective paint. When a light source shines on an object coated with reflective paint, the light rays are reflected back to the light source origin. This effect causes the license plate to be significantly illuminated compared to other objects in the picture. An example of this effect is shown in the figures below. 9
Page 1 and 2: A License Plate Recognition and Spe
Page 3 and 4: I. Abstract Since the 1980’s law
Page 5 and 6: II. Introduction The purpose of thi
Page 7: III. License Plate Recognition Conc
Page 11 and 12: eflective paint effect greatly incr
Page 13 and 14: Uniform and Constant To be as unifo
Page 15 and 16: “Horizontal angle must not exceed
Page 17 and 18: The video camera has another compon
Page 19 and 20: width is only 5/16” will be 3 pix
Page 21 and 22: signal, such as NTSC, a capture car
Page 23 and 24: choose a trigger that will require
Page 25 and 26: We briefly considered laser rangefi
Page 27 and 28: Fig. 17 Doppler Effect (Ref. 14) Th
Page 29 and 30: In this project, we will be using t
Page 31 and 32: V. Our System Design and Implementa
Page 33 and 34: LPR/SD System Process Flow Retrieve
Page 35 and 36: Fig. 25 Image of our LPR/SD system
Page 37 and 38: Our video camera served two functio
Page 39 and 40: V.B.2. Radar Gun The Ramsey Kit Ram
Page 41 and 42: Fig. 31 Assembled Oscillator The mi
Page 43 and 44: up to 100MHz. Once the signal has b
Page 45 and 46: I will discuss the pathway the inpu
Page 47 and 48: Fig. 35 Comparator Operation The si
Page 49 and 50: V.B.3. Serial Interface Circuit Boa
Page 51 and 52: we set pins 8 to 15 as input pins a
Page 53 and 54: Application Main Window Fig. 37 LPR
Page 55 and 56: Fig. 40 LPR.exe application windows
Page 57 and 58: Serial library was written by Ramon
Page 59 and 60:
W1, B2, B3, B4, W5, B6, B7, B8, B9,
Page 61 and 62:
characters were first extracted. Th
Page 63 and 64:
Plate Number - 791GPB Test Results
Page 65 and 66:
VI. Additional Applications The lic
Page 67 and 68:
needed to communicate with the traf
Page 69 and 70:
Local Network Fig. 50 LPR applicati
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VII. State of the Art Commercial Sy
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100 MHz wide or 200 MHz wide. Since
Page 75 and 76:
As with any new technology affectin
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law, a warrant-less crime must be c
Page 79 and 80:
experience high traffic volumes or
Page 81 and 82:
quite a fun experience to build the
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15) Radar Setup: http://mpdc.dc.gov
Page 85 and 86:
Appendix A: Our LPR/SD System Compo
Page 87 and 88:
Appendix B: Commercial Components 8
Page 89 and 90:
MDL LaserAce® IM OEM Laser Modules
Page 91 and 92:
UF500 Infrared Illuminator 91
Page 93 and 94:
HI-TECH Solutions SeeCar Software R
Page 96:
Appendix C: Camera Setup Calculatio
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