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Evaluating Imaging Quality: Best Practices and Standards for Federal Digitization Initiatives

This presentation by Michael Stelmach from the Library of Congress outlines key challenges in evaluating image quality within federal digitization initiatives. It covers defining content categories and imaging objectives, establishing quality measures, and identifying standard methods for performance evaluation. A roadmap is presented for image requirements, emphasizing performance metrics such as color depth and pixel density. Tools like the Digital Image Conformance Evaluation (DICE) system are introduced for assessing imaging device performance and software validation. Visit http://digitizationguidelines.gov/ for updates.

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Evaluating Imaging Quality: Best Practices and Standards for Federal Digitization Initiatives

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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/

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