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This package was compiled by the FAA Alaskan Region Public Affairs Office in Anchorage and sent to FAA managers with a memo from Paul Steucke dated March 5, 1987. It gathers material on the November 17, 1986 sighting by the crew of Japan Air Lines flight 1628: a news release, pilot and controller transcripts, crew interviews and radar analysis. The FAA concluded that it could not confirm the event. It attributed the second radar target to a split, uncorrelated return from the JAL Boeing 747 and planned no further investigation.
“Federal Aviation Administration”15 pages
Federal Agencies Digitization Initiative Still Image Working Group - August 201 o Table of Contents SCOPE ............................................................................................................................ 2 II. TECHNICAL OVERVIEW .............. .......................................................................... 4 Raster Image Characteristics .................................................................................................................................... .4 Spatial Resolution ........ .. ..................... ........... ......................... ........ ....................... ...... .................. ...... ..................... 4 Signal Resolution .......... ...... .... ....... ................. ........... .................... .... ....................... ........................... .................... .4 Color Mode .. ....... ................... ............... ............. ...... ....................... ............... ......... ................ ....... ............ ...............5 Digitization Environment ............................................................................................................................................ S V iewing Conditions ....... ........................... ...... .............. ......... ........... .................................................................. ...... 6 Monitor Settings, Light Boxes, and Viewing Booths .... .. ..... ........... .... ............. ................... ... ................................ ..6 The Room ................ ..................................................................................... ............ .. ............ ........... ....................... 6 Practical Experience ... .... .............. ............... .......... .............. ............... ....... .............................. ................ .. ............... 6 Monitor Calibration ... .............. ................... ........................................ ..... ..... ......................... ......................... .. ........7 Quantifying Scanner/Digital Camera Performance ................................................................................................. 7 Introduction ....................... ... .... .................................................................... ........ ... ....... ..................... .............. ........ 7 Tests for Objective Performance ofScanners/Carneras .......... ................. ............................... ................................ 13 Test Frequency and Equipment Variability ................................. ..................... .... .............. ...... .............................. 14 D igital Imaging - Objective Performance Measures ....... ...... ........ ............. ...... ... ... ... ....................... ...................... 15 Digital Imaging - Objective Performance Guidelines ...... .................................. ............... ......... ....... ..................... 29 Other Artifacts or Imaging Problems .... ....... ............... ................. ..... ...... ................................................................ 34 Reference Targets ......................................................................................................................................................34 Targets - Device-level and Object-level .................................................................................................................35 Scale and Dimensional References ..................................................... .. ............................................. .....................37 Targets for Tone and Color Reproduction ...................................................... ........................ ................................ 37 Reflection Scanning ....... .......................................................................... .. ....................................... ...... ...........37 Transmission Scanning - Positives .......................... .......................................................................................... 38 Transmission Scanning - Negatives ........................................................ .......................................................... 38 Ill. IMAGING WORKFLOW ..................................................................................... 39 Adjusting Image Files ................................................................................................................................................39 Overview ......................... ........ ......................................................................................................... ..................... .. 39 Scanning Aimpoints ................................................................................................................................................... 40 Aimpo ints for Photographic Gray Scales - ......... ................................................................................................... .42 Alternative Aimpoints for Kodak Color Control Patches (color bars) ......... ................ .. ........................................ .44 Ai111point Variability ...................................... ........... .......... .. ...................................................... ............................44 Minimum and Maximum Levels ................................................... .. .................... .................................................. .44 Color Management Background: .............................................................................................................................44 International Color Consortium (ICC) Color Management System .......................................................................45 Profiles ...... .. ........................................................................................... .. .............................................. ................. 45 Rendering Intents ...................................... ............................................................. ............ ... .................... ......... .... .46 Color Management Modules ..... ............................................................... ............................................................... 46 Technical Guidelines for Digitizing Cultural Heritage Materials: Creation of Raster Image Master Files II /
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