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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.
“Ç.”30 pages
Federal Agencies Digitization In itiative Still Image Working Group -August 20 10
- NOISE-
Engineering - Radiometric Distortion -
Mebic definition: The deviation of an y given spatially imaged point from an aim radia nt energy value relat ive to the input object.
"' Noise Power Spectrum (NPS) Chromatic Noise~~ Tot.al Noise
~ li Definition : The lnter·color chan nel radlomell'ic deviations
~ :E
Definition : A spatial frequency descriptor of the sources or radiometnc noise or an Imaging relative to an Identified aim
component or sysl:em
Temporal Noise Fixed Pattern Noise Colo[ Ualformlty Colo[ SFR ualfo[ml!:Y
Cdetermlolstlcl Cdetermlolstlcl
Ra adorn Baadiagl ~ ~oa·UalfQrm~l Definition : A difference in laroe Oefrnilion: The cfirferentlal
~ ~ ~ Streaking ~ Shading area unlformity/shad:ng spread or light between COior
Delinffion : The root Definition : pomt or between color channels channels.
·~~ (detelllllal<tic) (determlai<li<Jmean squarl! ck!Yiat\on Deflflit:Jon : One dusters or DerVlitfon: A deVJation in
,!!: :E ( std. devlabon) of both dlmenslonal defective or poorly the elfective "1umlnatJontemporal and fixed patterns corrected pixels over a capture deVHll'Spattern noise for a
single color channel field of view; usually with
lower mumlnation near the
field 's outer extent
• Temporal noise • Stripes · Hot, Cold, or · Vignetting · Rainbows - COiored edges
" ! · Grain • Banding Dead Pixels • Relative IUumlnation - COior Bleed
~ c. E · Shot noise · Streaking • Wounded Pixels - Fringing
Ii! ~s · Read noise · Blinkers
" • White noise
I!:' e:RMS deviation or e : Therelative e: The number or e:The perrent deviation e: The percent deviation or e: The ditTerence In SFR
.. {; pixel values Jn t:erms or amount or size of defects or several large area several large arl!a chroma response between selected
~ ~ selected metr1c(J.e., variance or noise per unit sensor luminance measurEments measurements owr the rield of color channels.
b ~ · ~ oounts, clensity, power that a arEa. over the field ot view view relative to the average of units: % deviation in SFR
:§ ·c::: . .. Luminance) over an selected spatial units: # of relatilil! to the average of those chroma measurernerts. response relative to the
. ::. ii Identified region of frequency band d efects/un ~ those meas1Jrernents. units: % chroma difference highest measured SFR
1!! ~~ o Interest contributes to sensor arEa units: % Luminance (unit less) ( u n ~ less)
ii E the total noise. dJtTerence (unit less)
~ i£ units: oounts, density, units: Tl!Du
• Luminance
· Aggressive digital • Poor sensor · dust on sensor • poorly designed optics • Ollef ray angle (ffiA) • Poor optical des!Qn or
~ signal ampllfic.atlon or c.allbratlon • poor sensor • non·uniform lighting mismatch between optics and performanre
:i processing ·dust/dirt on fabrication sensor
!~ • Hloh ISO .,,_i ll"""'arny hygkmo - No11-unifurm cuCor coaUngs at
~G selection sensor - poor sensor sensor fabrication.
• High throughput .. poor sensor calibration
c.. worlcflows ca libration
Techn ical Guide line s fo r Di gitizing Cu ltural Heritage Materials: Creation of Raster Image Master Fil es 11 Document, cited by the archive. The PDF is mirrored here; the original link is under it. 122 pages are in the text index: search them above, or from the library's search.