A License Plate Recognition and Speed Detection System - Index of

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V. B.4 Table of License Plate Recognition / Speed Detection System Hardware Components Table 5 Our LPR/SD Hardware Components Component Description Store Bought From Purchase Price Unibrain Fire-I Board Color Video Camera www.unibrain.com 105$ 12V AC adapter www.unibrain.com $20 Unibrain FirWire 400 CardBus Card www.unibrain.com 45$ Unibrain 50mm Telephoto Lens www.unibrain.com $70 Ramsey Electronics SG7 kit (Radar Kit) www.ramseyelectronics.com $70 Basic Stamp Training Kit (Serial Interface Circuit Board) www.parallax.com $80 Compaq nc6220 (Laptop Computer) www.hp.com * TOTAL: $390 *Note: We did not include the cost of the laptop computer. V.C. LPR Software There are software packages available for license plate recognition. An example is HI- TECH Solutions SeeCar Software Recognition Package (pricelist given in Appendix B). However, these software packages cost over $4,000 per license which was beyond our budget limits. Instead, we wrote our own software to perform the license plate recognition. We researched free available software libraries to minimize the amount of customized code that would need to be written. Customized code was written to glue these libraries together and provide any additional functionality. The libraries and customized code were combined in to one application executable called LPR.exe. The executable runs on Microsoft Windows XP. The following screen shots show the menus and windows of the application. 52
Application Main Window Fig. 37 LPR.exe application main window The picture above shows the main window of the application. There is a main menu on top and live video from the video camera is shown beneath. The main menu contains several items that each open a sub menu. The “Camera” main menu item opens a submenu containing commands to initialize the camera. These include commands to adjust camera settings such as brightness, exposure time, sharpness, white balance, hue, and saturation. The “Mode” main menu item opens a submenu to set the image type. Image types define the image format type, i.e. YUV, RGB, Mono as well as image size, 640x480, 320x240, or 160x120. The “Rate” main menu item 53
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 and 8: III. License Plate Recognition Conc
Page 9 and 10: III.A. LPR Light Source There are s
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: we set pins 8 to 15 as input pins a
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
Page 71 and 72: VII. State of the Art Commercial Sy
Page 73 and 74: 100 MHz wide or 200 MHz wide. Since
Page 75 and 76: As with any new technology affectin
Page 77 and 78: 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
Page 83 and 84: 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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