The basic structure for filenames is creation date, object, (kind of illumination optional), angle of illumination, rendering, channels, camera, and variants separated by hyphens. The example
20140218-Pal1-99-Xepn-04-50m-n.ptm could be read as file created on February 18, 2014, object Palimpsest 1, unlimited angles of illumination, Extended Spectrum using Eureka lights, PCA, normalized, four channels (LRGB), 50 megapixel camera, normalized, polynomial texture map.
Creation date is the date of capture for capture files and for PCA only files, but the date of generation for additionally processed files.
The object code is always four characters
Pal1is the UCLA Palimpsest, first page imaged.
Maskis the painted mummy mask.
Soldis the terracotta figurine of the conquering and conquered soliders.
Ant2is the antiphonary, second folio.
Ant3is the antiphonary, additional folio (not included in summary).
Pal3is the UCLA Palimpsest, third page imaged (not included in summary).
Specis spectralon reference object (not included in summary).
The kind of illumination is always three characters.
045refers to the combination of light taken from the Eureka lights and flash at 35 angles (45 represents the number of illuminations, 35 flash plus 10 [actually 11] bands from the Eureka lights).
324refers to the combination of light taken from the Magic Flashlight, 9 bands at 35 angles (actually 315 angles but convention of using 324 established with 36 angles planned).
393wavelength in nanometers (ultraviolet narrow band)
399wavelength in nanometers (ultraviolet narrow band)
446wavelength in nanometers
478wavelength in nanometers
507wavelength in nanometers
529wavelength in nanometers
597wavelength in nanometers
624wavelength in nanometers
660wavelength in nanometers
830wavelength in nanometers (infrared narrow band)
FlaFlash (Xenon tube)
The angle of illumination is always two digits.
00refers to the diffuse light from Eureka lights.
01-35refers to the angles of illumination ranging from nearly direct (01-05) to steeply raking (31-35).
99refers to files that consolidate information from angles 01-35.
Rendering is always four characters
Acccrefers to accurate color
Accerefers to accurate color generated from a combination of the Eureka lights and the flash.
Accmrefers to accurate color generated from the Magic Flashlight.
Xepnrefers to Extended Spectrum rendering generated from the Eureka lights using principal component analysis on three separate ranges of wavelengths and normalized.
Xmpnrefers to Extended Spectrum rendering generated from the Magic Flashlight using principal component analysis on three separate ranges of wavelenghts and normalized.
Peplrefers to pseudocolor with the Eureka lights processed using PCA based on local stats.
Pepgrefers to pseudocolor with the Eureka lights processed using PCA based on global stats.
Pmplrefers to pseudocolor with the Magic Flashlight processed using PCA based on local stats.
Pmpgrefers to pseudocolor with the Magic Flashlight processed using PCA based on global stats.
Peilrefers to pseudocolor with the Eureka lights processed using ICA based on local stats (available in data archive for Pal1).
Peigrefers to pseudocolor with the Eureka lights processed using ICA based on global stats (available in data archive for Pal1).
Pmilrefers to pseudocolor with the Magic Flashlight processed using ICA based on local stats (available in data archive for Pal1).
Pmigrefers to pseudocolor with the Magic Flashlight processed using ICA based on global stats (available in data archive for Pal1).
Channels is always two digits.
01refers to a monochrome image.
03refers to an RGB image (intermediate YCbCr or LAB images generally not stored).
04refers to an LRGB Polynomial Texture Map.
Only one camera identifier is used in for this project in this convention. The conventional RTI control method filenames (above) do not identify the camera explicitly.
50mrefers to the 50 megapixel MegaVision camera.
Many variants were tested and are distinguished only by appearing at the end of the filename before the file extension.
001-011in the capture files is the index of capture sequence.
nrefers to normalization.
wrefers to normalization based on the whole field of view.
mrefers to normalization based on the macbeth chart.
120or another three digit number greater than 100 refers to luminance magification, in this case multiply pixel values by 1.2 (similarly 250 multiplies by 2.5, 175 multiplies by 1.75).
300x300or any numbers separated by "x" refer to the image dimension in pixels for a non-standard crop, in this case a 300 by 300 pixel thumbnail.
rgb210refers to variant pseudocolor generated by mapping the third (#2) principal component to the red channel in an RGB image, the second principal component (#1) to the blue channel, and the first principal component (#0) to the blue channel.
yccf01refers to a variant pseudocolor generated by mapping the flash capture to the Y (luminance) channel in a YCbCr image, the first principal component (#0) to the Cb channel, and the second principal component (#1) to the Cr channel.
.tifuncompressed tagged image format used for archives
.jpgcompressed jpeg used for Internet summary distribution and as intermediate stage required by polynomial texture map fitter.
.ptmpolynomial texture map (experimental
.hsh[hemispherical harmonics] or
.rti[reflectance transformation imaging with hemispherical harmonics] appear among the tests in the complete archive.
.dngDigital Negative Format used initially by Photoshoot software, always accompanied by an open archive in tiff format.
Additional conventions are used by William Christens-Barry in the creation of the spectral imaging control set.
WCBrefers to William Christens-Barry.
Frefers to flattening.
Nrefers to normalized (sometimes at more than one stage of processing).
nErefers to negative eigenvalues permitted in principal component analysis.
combirefers to combinatorial processing of pseudocolors.
PSUrefers to pseudocolor.
01-02-03-04-05refers to experiments working from principal components 1-5.
The conventional RTI files created by the West Semitic Research Project at the University of Southern California have not been renamed.
UCLA_Rouse_MS32_131R_v3_cropped_3019.ptmUniversity of California Los Angeles Rouse Manuscript 31, folio 131 recto, version 3, cropped to a width of 3019 pixels, polynomial texture map format.
USC7498_Mummy_Mask_cropped_2107.ptmUniversity of Southern California catalog number 7498 (Mummy Mask) cropped to a width of 2107 pixels, polynomial texture map.
USC10663_Smiting_Warrior_cropped_2690.ptmUniversity of Southern California catalog number 10663 (Smiting Warrior) cropped to a width of 2690 pixels, polynomial texture map.
Flewelling_Antiphonary_F2Recto_LRGB2559.ptmFlewelling Antiophonary Folio 2 Recto, LRGB format, 2559 pixel width, polynomial texture map.