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i-LIDS. i magery L ibrary for I ntelligent D etection S ystems Luke Sands. Introduction. Who are HOSDB? i-LIDS project Video Evidence Analysis Questions. HOSDB. H ome O ffice S cientific D evelopment B ranch

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i-LIDS

imagery Library for Intelligent Detection Systems

Luke Sands


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Introduction

  • Who are HOSDB?

  • i-LIDS project

  • Video Evidence Analysis

  • Questions


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HOSDB

  • Home Office Scientific Development Branch

  • Impartial technical advice, support and evaluation for the UK Police and Government

  • Detection and Vision Systems Group


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i-LIDS

  • Collection of real-world Closed Circuit TeleVision (CCTV) test imagery

  • Aim 1: Performance evaluations of Vision-Based Detection Systems (VBDS)

  • Aim 2: Imagery for future system and algorithm development


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Background

  • VBD systems could help UK Police and Government be more efficient

  • Many systems already available

  • Performance variation between these systems and the applications

  • HOSDB need to quickly assess the suitability of VBDS for typical outdoor applications


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Chosen Scenarios

  • Sterile zone or perimeter monitoring

  • Parked vehicle detection

  • Abandoned baggage detection

  • Doorway surveillance and monitoring


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Consultation and trials

The i-LIDS specification generated through consultations with:

 Academia

Industry

  • GovernmentandPoliceusers

VMD trials have helped develop the specification for the library content


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i-LIDS Content

  • Should allow rapid and consistent evaluations

  • Representative of 12-months live testing at operational sites

  • Contain all plausible variations to calculate an indication of performance for most scenes

  • Relevant for development over next 5 - 10 years


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Content example

Test imagery weighted towards the boundaries the capability of VBD systems and the user operational requirements


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Event alarms that should be detected

Non-event alarms that

should be ignored

Scenario Contents


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Sterile Zone Monitoring

A typical ‘event alarm’ test sequence filmed at HOSDB premises


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Doorway Monitoring

A typical ‘event alarm’ test sequence captured from a CCTV camera on site


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Parked Vehicle Detection

A typical ‘non-event alarm’ test sequence captured from a town center CCTV camera


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i-LIDS Sets

Three similar i-LIDS sets of the four scenarios

Two public sets:

  • System training set

  • System testing set

    One private HOSDB set:

  • In-house system evaluation set



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Image Collection

  • Imagery taken from standard PAL output CCTV video cameras

  • Recorded to portable broadcast quality digital Betacam tape recorders

  • Transferred via SDI to PC for editing and tagging

  • Simple editing and limited compression to minimise artifacts


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Image Storage

  • Test sequences of varying length and complexity

  • Accompanied by simple XML ground truth

  • Library sets supplied on large HHD and searchable using the XML database

  • Master copies held by HOSDB on digital Betacam tapes


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i-LIDS Distribution

  • Calibrated imagery accompanied by complete glossary of descriptors

  • Available to public in QuickTime Motion JPEG format

  • Demonstration samples and updates may be available on DVD or some other means

  • A complete 24hr set will be available on hard disc drive


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Police Automatic Picture Analysis (PAPA)

  • Huge volume of video evidence associated with major investigations

  • Can come in a variety of forms, e.g.

    • Analogue multiplexed videotapes

    • Timelapse

    • DVDs/CDs

  • Need to extract useful information

  • Can technology help?


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PAPA

  • Two stage process

    • Video handling

    • Automatic Analysis Tools (AATs)

  • Demonstrator for video handling developed

    • Currently undergoing assessment

  • Implement AATs

    • Have conducted brief literary review

    • Looking to test?