Data capture technology
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Vice – Presidency for Strategic Planning and Supervision Statistical Centre Of Iran. Data Capture Technology. Statistical Centre Of IRAN Presented by : MS. SOMAYE AHANGAR. Data Capture Technologies. Personal Digital Assistant (PDA) Intelligent Character Recognition (ICR).

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Data Capture Technology

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Data capture technology

Vice – Presidency for

Strategic Planning and Supervision

Statistical Centre Of Iran

Data Capture Technology

Statistical Centre Of IRAN

Presented by :

MS. SOMAYE AHANGAR


Data capture technologies

Data Capture Technologies

  • Personal Digital Assistant (PDA)

  • Intelligent Character Recognition (ICR)


Pda technology

PDA Technology

  • Instances of the PDA applications in the SCI Surveys and Censuses

  • General Advantages

  • Application specification

  • Localization and customization

  • Activities for conducting the survey

  • Limitations


Instance of the pda application in the sci

Instance of the PDA application in the SCI

  • Collecting images and multimedia contents on tribes in the Census of Nomadic Tribes of Iran in order to be used in Encyclopedia of Iranian Tribes.

  • In sampling surveys including monthly and periodical surveys PDAs are frequently used.


General advantages of pda

General Advantages of PDA

  • They are convenient tools for Personal Information Management (PIM).

  • They offer various kinds of input keyboard (Hardware keyboard, Virtual Keyboard on LCD, Finger- touch screen)

  • Communication via USB, Infrared and Bluetooth

  • Accurate, rapid, single- time data entry.

  • They could lead to elimination of paper questionnaires in surveys/census.

  • There will be no need for verification step.

  • PDA application will reduce the need for human resources leading to more efficiency and cost effectiveness in projects


Application specification

Application specification

  • The current devices’ model in use are :

    • HP iPAQ HW6945

    • HP iPAQ HW-6955

  • Developed software packages consists of 3 sections:

    • The mobile software edition used in PDA device

    • The desktop application for central management system in provinces

    • The desktop application for central management system in the SCI

  • Developed in .NET technologies and SQL Server 2005 CE


Localization and customization

Localization and customization

  • Application of GPS devices to take spatial Information

  • Assignment of sample working scopes to enumerators in monthly survey is dynamic. It should be mentioned that this dynamic process may causes some problems and concerns.

  • Measuring and evaluating spent time in each place under enumeration.

  • Simultaneous error validations to maintain data consistency.

  • Flexible navigation tool enabling browsing between different pages for filling their blank fields.

  • Possibility of data transmission thought internet


Activities for conducting the survey

Activities for conducting the survey

  • Collecting Data by interviewers

  • Moving collected data from devices to central management system in provinces

  • Reviewing and verifying data by experts of provinces

  • Sending database files (.sdf files) by data communication from provinces to the SCI

  • Converting and processing received files

  • Generate new .sdf file for using in next period


Limitations

Limitations

  • Requires trained staff

  • In order to find direction and paths by using digital geographical maps, a more comprehensive database of maps of roads is necessary which itself requires updating the current data.

  • For using GSM features proper coverage of mobile communication network is necessary in all areas under enumeration.

  • Hardware problems like short battery life of some PDAs and their failure to operate properly as well as problem in synchronizing of PDA with pc were among other problems.

  • a comprehensive management systems– particularly in monthly surveys- is necessary to process the received files in timely manner in order to generate the required data file for next month. Sometimes, time constraint is a major problem.


Icr technology

ICR Technology

  • Overview

  • Top Operational Reasons

  • Accuracy

  • ICR Stages

  • Instances of the ICR usages in the SCI Surveys and Censuses

  • Application specification and consideration

  • The Strength Points using ICR in the SCI


Icr overview

ICR Overview

  • ICR is an advanced automatic data entry system

  • Captures the images of document forms

  • Reads handwritten, machine-printed, barcodes and other data fields

  • The Interpret engines convert the precious data of the images into digital format

  • Recognizes printed letters with one letter in each box


Top operational reasons

Top Operational Reasons

  • Cost effectiveness

  • Improved accuracy

  • Shorter cycle time

  • Improved work distribution (skill, location)

  • Audit trails and reporting and tracking tools

  • Data privacy


How accurate it depends

How Accurate? It depends

  • Quality of incoming documents is a very critical issue

    depending on :

    • Form design

    • Scan

    • Original vs. photocopy

    • Dropout vs. non-dropout


Icr stages

ICR Stages

  • Template/Form creation

  • Image capture & scan

  • Image pre-processing

  • Batch processing

  • Recognition and data extraction

  • Data validation and Review


Icr process schema

ICR Process Schema


Character verification

Character Verification


Field verification

Field Verification


Instance of the icr usages

Instance of the ICR usages

  • Conducting a pilot census in some provinces in 2005

  • Conducting 2006 National Population and Housing Census

  • Using it as a major data capture tool in Iranian Households Economic Data Collection Project in 2008


Application specification consideration

Application specification & consideration

  • Various kind of forms with different layouts and contents

  • High complex structure of Farsi writing in comparison to Latin

  • Scan forms for about 45 pages per-minute for double sides in A3 size forms with 200 DPI resolution

  • Distribute the tasks using completely automated management systems

  • Developed modules for rule and batch editing, within the ICR software packages


Batch rule verification

Batch & Rule Verification


The strength points

The Strength Points

  • Using the product of the same company’s software in 2006 Census, which was used in 2005 Pilot Census because of its accuracy and reliability.

  • Improving quality of the developed software based on feedbacks and experiences gained from the Pilot Census and experimental versions.

  • A good practice in designing and preparing of the questionnaire forms

  • A good practice in offering an acceptable estimation of scanning and reading times.


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