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Process Stages of Census Surveys

Process Stages of Census Surveys. Richard J. Lang, International Consulting. May 2008, Doha, Qatar. Agenda. Scanning Recognition Verifying Processes The solution Data capture Census Process internal Census data flow Quality assurance. Scanning. Side 2. Sheet. Side 1. Page. Batch.

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Process Stages of Census Surveys

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  1. Process Stagesof Census Surveys Richard J. Lang, International Consulting May 2008, Doha, Qatar

  2. Agenda • Scanning • Recognition • Verifying Processes • The solution • Data capture • Census Process internal • Census data flow • Quality assurance

  3. Scanning

  4. Side 2 Sheet Side 1 Page Batch EA Doc Page Sheet EA Doc Image Scanning Side Image Grey Image B/W

  5. The Path to Recognition • Analyze the structure of documents for identification • Perform proper clean-up and image pre-processing • Analyze individual page layout • Dynamically locate fields of interest • Character recognition (numeric handwriting, voted) • Compile results

  6. Skewed document ... …after alignment Recognition – Image Pre-processing 8 1

  7. Recognition: Noise and box removal

  8. Verifying Processes • Unique Number – double Scan check • Double feed check • Check if Copy • Trace of all editing work • Logical checks • Completeness checks • Reports

  9. The Solution: SC80HC + FC Census FC Census recognition Work Data Storage Data + Images Preparation: cut & jogg CSPro Export VSAT Archive Data Storage Batch Header Paper Archive Formx TAPE Editing Local reports

  10. Data capture • Scan-Job done in 6 months • 7 locations • Peak period 3 shifts, average 1-2 shifts • Local operators trained by our supervisors • Supervisors local • Central support from Lab • Training & documentation realised in advance • Help to design the documents

  11. Census Process internal Form Type Analysis Structure Analysis ICR voting Command Processing ICR 1 ICR 2 Editing LogicalResult Analysis ICR Result Analysis Output Assembly

  12. Server Census data flow ProcessStation 3 ProcessStation 1 ProcessStation 2 ProcessStation “n” logical Network. Process flow controlled via process queues. „outside world“

  13. Quality assurance • Form design with scanning quality check • Before delivery of paper scanning quality check • Confirm the quantity of forms • Make use of Trial Census experience • Establish checks for essential criteria's only • Make day for day checks during the running Census • As soon as possible check the results and verify • Back up / Reporting • National / International Supervisors

  14. Thank you! • We are prepared for your Census

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