2011 License Plate Recognition About Digifort LPR System The Digifort LPR offers general-purpose license plate reading from any type of cameras. Allow or Ban a certain list of number plates, and set actions accordingly, such as send email, trigger alarm or trigger an output to open the gate – automatically! Digifort Pty Ltd 3/4/2011 About Digifort LPR Recognition Engine The Digifort License Plate Recognition Engine possesses all the features a high quality license plate recognition system that is fast, highly accurate, fail safe, stable, and intelligent. Meanwhile it provides the highest technological performance amongst today's license plate readers, Digifort LPR offers great flexibility for integrators of car plate recognition systems: it can be integrated into practically any system which needs automatic vehicle recognition. Features of Digifort LPR The Digifort LPR offers general-purpose license plate reading from digital pictures of any type of cameras. Whether it is a megapixel-size, 12bits/pixel high dynamic range, high resolution digital image or a 320x240 size colour CCTV video picture provided as input, Digifort LPR provides balanced reading of car plates. The automatic number plate recognition engine is powered by CARMEN® with over 98.5% recognition rate (correct reading/total number of input) working 24h/day, 7days/week. CARMEN® is a proven product - and a living automatic vehicle recognition technology Technical Specifications of Digifort LPR Engine Supported Operating Systems Windows Family (XP, Vista, 7, Server 2003/2008) 32/64Bit Type of Plates Recognition is country and font independent. Any Latin, Arabic, Chinese, Korean and Cyrillic characters can be recognized. Trigger Trigger is not necessary but recommended when recognizing from live video and more than 2 LPR cameras using single CPU core license. Motion Detection as trigger for 2 LPR Cameras maximum per CPU core license. Sample Processing Time Standard engine: 50ms @ CPU 2GHz B&W images, 768x288 pixels (PAL/2) Processing Time Dependence Image quality (complexity, noise level etc.) Image size Processing power (CPU speed) Parameter settings Output Plate number in ASCII/UNICODE Confidence levels for each tips Single Plate detection per image System Requirements Intel Core2 Duo 1.8GHz or higher CPU (1024MB RAM) Digifort LPR can provide and/or improve: Automatic highway toll collection systems Traffic Analytics during peak periods Automatic access control point management Automation of weigh-in-motion systems Enhanced vehicle theft prevention Effective law enforcement Border control systems Building a database of traffic movement Bus lane or red light enforcement Automation of airport and harbour logistics Security monitoring of roads, checkpoints, etc. Prevention of drive-off’s at gas stations, drive-in restaurants, etc. Although they are many LPR cameras available, here are some that are highly recommended by Digifort. Brand: Model: ARH FXCAM IBW 2000 CCD 1/3” Infra-Red IP66 Rated Analogue Camera Brand: Model: Messoa SCR510 Sony CCD ½” Infra-Red IP66-IP67 Rated Analogue Camera Brand: Model: DemoCSI TAG-1 Sony CCD 1/3” Infra-Red IP66 Rated Analogue Camera Taiwan LPR Test Security image print Image details License plate 605CLQ Camera Name 01 Date and Time of the Image Tuesday, 8 March 2011 15:45:04 Operator Name Dario Date and Time of the Print Tuesday, 8 March 2011 15:57:03 Operator Notes Test Printing From Digifort <any notes here> C opyright (c) 2002 - 2010 Digifort - IP Surveillance System Select Single/Multiple LPR Camera Objects Print Reports from AND/OR Queries Save to PDF Export to CSV (comma-separated values) Save to PDF Jump to Playback/Recording Advanced AND/OR Queries Scroll through queried results with Snapshot Preview Trigger Event(s) on detected number plate Ability to Link to 3rd party system via HTTP API As each number plate is detected, characters are assessed for an accuracy/confidence level rating. These rating are represented as colour characters on the virtual number plate in the main GUI. Accuracy, or Confidence level, is how certain the LPR engine is that the detected character is the actual character on the image. BLACK Over 90% Accuracy BLUE from 70% to under 90% Accuracy RED under 70% Accuracy You can define a detection area (if using motion detection as trigger). This also allows configurations of a single camera for multiple lanes of traffic for LPR detection, or simply, narrowing down the detection area. OSD Timestamp is ignored. LPR Control List is a group of number plates to which an action or multiple actions can be applied. When these number plates are detected, actions are automatically executed by Digifort. Note: Digifort LPR server, can run on a separate server, or on the same server as Digifort recording server. Primary factor that influences this is the number of LPR cameras that you wish to process. ?? Getting the the best best images images for for LPR LPR Getting What isis required? required? What - Toget getthe themost mostaccurate accurateresults resultsfrom froman anLPR LPRsystem, system,the thecaptured capturedimages/video images/videoare arethe the To mostimportant importantfactor. factor. most Therequirements requirementsare; are; The LPRCamera Camera 1.4. LPR Cameras specifically designed designed with with high high shutter shutter speeds speeds to to capture capture fast fast moving moving Cameras specifically objects without without image image blurring. blurring. Most Most megapixels megapixels cameras cameras will will blur blur on on fast fast objects movements so you may consider slowing or stopping the vehicles if not using an movements so you may consider slowing or stopping the vehicles if not using an LPRcamera. camera. LPR MinimumResolution Resolution320x240 320x240@ @3FPS 3FPS 2.5. Minimum Character size size on on number number plate plate must must be be minimum minimum 16 16 pixels pixels high. high. Resolution Resolution isis Character not important important as as long long as as the the captured captured image image has has good good spatial spatial resolution, resolution, not sharpness, contrast, lighting conditions and angle of view. sharpness, contrast, lighting conditions and angle of view. CameraAngle AngleView View 3.6. Camera Camera needs to see see the the entire entire vehicle vehicle and and the the number number plates plates so so aa person person Camera needs to watchingthe thevideo videocan canread readthe thenumber numberplates plateswith withtheir theirown owneyes. eyes.IfIfaaperson person watching canmake makeout outthe thenumber numberplates plateswith withease, ease,then thenthe theDigifort DigifortLPR LPRengine enginewill willalso also can work well. work well. Examples; Examples; -Characterstoo toosmall small(less (lessthan than16 16pixels pixelshigh) high) -Characters -LowSpatial SpatialResolution Resolution -Low -Image too blurry -Image too blurry -Low Contrast / too Dark -Low Contrast / too Dark -Overexposure / too Bright -Overexposure / too Bright -Bad lighting conditions -Distorted Image -Bad lighting conditions -Interlacing -Distorted Image -Good Spatial Resolution -Good Sharpness -Interlacing -High Contrast -Good Lighting Conditions -Good Resolution -GoodSpatial Position and Angle of View -Good Sharpness -High Contrast -Good Lighting Conditions -Good Position and Angle of View Good Position/Angle Clear Image Good Contrast Good Size of Numbers ? How LICENSING works? What is required? To enable Digifort IP Surveillance for LPR detection, 2 licenses are required; 1. Separate Server (Recommended) A separate server is recommended for LPR detection, although not always necessary – depends on number of LPR cameras and configurations. 2. Digifort LPR Base License Digifort requires a license that will allow a LPR license dongle to be inserted & detected. Without the LPR BASE license, you will not be able to use Carmen or Kapta dongles on the system. Contact firstname.lastname@example.org for more information. 3. Carmen FreeFlow License (Dongle) OR Kapta Dongle Carmen or Kapta dongles can be purchased directly from the manufacturer or through Digifort. Kapta is for South America only, and is looking for a particular format of the number plates. 3 Letters, 4 Numbers (EG: XXX-1234) Carmen can be used worldwide and is country and font independent. (recommended) NOTE: Carmen and Kapta both use hardware protection; therefore they do not offer any DEMO options. A license/dongle needs to be purchased for demo purposes and the price can be negotiated with the manufacturer. DISCLAIMER © 2010-2011 DigiFort Pty Ltd. All rights reserved. By providing this document, DigiFort Pty Ltd is not making any representations regarding the correctness or completeness of its contents and reserves the right to alter this document at any time without notice.
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