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EVALUATING IMAGING QUALITY

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EVALUATING IMAGING QUALITY

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  1. EVALUATING IMAGING QUALITY Federal Agencies Digitization Initiative – Still Image Working Group Presented by Michael Stelmach Library of Congress, Office of Strategic Initiatives March, 2009

  2. The Challenge • Define Content Categories • Define Imaging Objectives • Decide on Measures of Quality • Identify Standard Methods to Derive Measures • Design Tools to Evaluate Image Performance and Quality • Create Standard Methods of Evaluation

  3. Progress • Detailed definitions established for content categories and imaging objectives • Performance measures to be captured and defined (current) • Performance measurement standards identified • Tools developed to validate required image performance measures to actual values

  4. Roadmap to Image Requirements – Content and Objectives Combined with…

  5. Roadmap to Image Requirements – Performance Measures

  6. Advances Image Specs From • Color vs. Monochromatic • Bit Depth • Pixel Density

  7. To…. Specific to content and objectives…

  8. Example of Concept Requirements Matrix

  9. Image Performance Measure – Tools • Digital Image Conformance Evaluation (DICE) System • Targets providing known references • Device Target – Imaging Device Performance • Object Target – Actual Image Quality • Evaluation/Validation Software – LabVIEW-based • Data export for use in SQC/SPC

  10. Device and Object Targets

  11. Object Target in Use

  12. DICE Software – Main Panel

  13. DICE – QC Summary Panel

  14. More to Come… To keep up with our progress and submit your suggestions, please visit http://digitizationguidelines.gov/