A License Plate Recognition and Speed Detection System - Index of

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officer has sufficiently trustworthy facts and circumstances such that a prudent person would conclude that the suspect has or is committing a crime. The Sixth Amendment to the U.S. Constitution states “In all criminal prosecutions, the accused shall enjoy the right to a speedy and public trial, by an impartial jury of the State and district wherein the crime shall have been committed, which district shall have been previously ascertained by law, and to be informed of the nature and cause of the accusation; to be confronted with the witnesses against him; to have compulsory process for obtaining witnesses in his favor, and to have the Assistance of Counsel for his defense.(emphasis added)”. A legal challenge to the use of a red light camera was brought up in the case of Dajani v. Maryland. The court dismissed the case based on the lack of standing to sue based on the plaintiff’s failure to show threat of immediate or future injury. Plaintiff Dajani then argued in federal court that the traffic code was unconstitutional based on the Sixth Amendment and the Fourteenth Amendment (All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws. (emphasis added)). The federal court upheld the state courts opinion base on subject and jurisdictional grounds and did not address the constitutional issues. Opponents to the use of photo radars and /or red light cameras claim that there are alternatives to their use. One alternative is to remove unwarranted traffic lights and replace them with four-way stop signs. However, in general, traffic lights are installed at intersections that 78
experience high traffic volumes or high speeds where stop signs are not appropriate. A second alternative is to adjust the signal’s timing to provide a longer yellow light. Even where the signal’s yellow phase had been lengthened, people still ran the red light. A third suggested alternative has been to change the geometry of the intersection to make the traffic signals more visible to drivers. However speed and distraction are the main culprits resulting in drivers running red lights. Proponents of these traffic control devices claim that the gain in safer roadways is measurable. Indeed, both the Insurance Institute for Traffic Safety and the National Highway Traffic Safety Commission supports their use. The cameras photograph only the vehicle’s license plate thereby reducing the privacy issues. Adequate notice is given to the persons receiving the citation to allow them to obtain legal counsel. The public highway does not provide for the same expectation of privacy that is accorded a person's home. All drivers operate their vehicles in plain and open view. Finally, in all states of the Union, speeding and running traffic lights is against the law. Connecticut was the first state to adopt speed laws in 1901; 12 mph in the city and 15 mph in rural areas (Ref. 23). The preceding was a necessarily brief overview of the legality of these traffic control devices. For those interested in this area, we urge you to follow up with the references and resources provided at the end of this work. 79
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A License Plate Recognition and Spe
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I. Abstract Since the 1980’s law
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II. Introduction The purpose of thi
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III. License Plate Recognition Conc
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III.A. LPR Light Source There are s
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eflective paint effect greatly incr
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Uniform and Constant To be as unifo
Page 15 and 16:
“Horizontal angle must not exceed
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The video camera has another compon
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width is only 5/16” will be 3 pix
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signal, such as NTSC, a capture car
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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
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: law, a warrant-less crime must be c
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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