File:Rings of Neptune PIA01997.png

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Rings_of_Neptune_PIA01997.png ‎(700 × 512 pixels, file size: 128 KB, MIME type: image/png)


Credit: NASA/JPL
Description
English: two 591-second exposures of the rings of Neptune were taken with the clear filter by the Voyager 2 wide-angle camera on Aug. 26, 1989 from a distance of 280,000 kilometers (175,000 miles). This PNG was converted from NASA's original TIFF with IrfanView, and differs from NASA's JPG version at File:Rings of Neptune PIA01997.jpg.
ImageMagick's report on difference between NASA's TIFF and NASA's JPG shows distortion:


ImageMagick-6.5.7-Q16\compare.exe -verbose -metric mae Rings_of_Neptune_PIA01997.tif "PIA01997.jpg" PIA01997.TIFFdiffJPG.png
Rings_of_Neptune_PIA01997.tif TIFF 700x512 700x512+0+0 8-bit Grayscale DirectClass 158KiB 0.000u 0:00.006
PIA01997.jpg JPEG 700x512 700x512+0+0 8-bit PseudoClass 256c 69.7KiB 0.000u 0:00.008
Rings_of_Neptune_PIA01997.tif=>PIA01997.TIFFdiffJPG.png TIFF 700x512 700x512+0+0 8-bit DirectClass 288KiB 0.343u 0:00.336
Image: Rings_of_Neptune_PIA01997.tif
  Channel distortion: MAE
    red: 1169.97 (0.0178526)
    green: 1169.97 (0.0178526)
    blue: 1169.97 (0.0178526)
    all: 1169.97 (0.0178526)
ImageMagick's report on difference between NASA's TIFF and derived PNG shows no distortion:


ImageMagick-6.5.7-Q16\compare.exe -verbose -metric mae Rings_of_Neptune_PIA01997.tif "Rings_of_Neptune_PIA01997.png" PIA01997.pngdiffTIFF.png
Rings_of_Neptune_PIA01997.tif TIFF 700x512 700x512+0+0 8-bit Grayscale DirectClass 158KiB 0.000u 0:00.005
Rings_of_Neptune_PIA01997.png PNG 700x512 700x512+0+0 8-bit PseudoClass 61c 128KiB 0.000u 0:00.009
Rings_of_Neptune_PIA01997.tif=>PIA01997.pngdiffTIFF.png TIFF 700x512 700x512+0+0 8-bit DirectClass 160KiB 0.296u 0:00.261
Image: Rings_of_Neptune_PIA01997.tif
  Channel distortion: MAE
    red: 0 (0)
    green: 0 (0)
    blue: 0 (0)
    all: 0 (0)
Date
Source [1] from Catalog Page for PIA01997, converted to PNG with IrfanView
Author Voyager 2, NASA/JPL
Other versions
Original Full-Res TIFF from NASA
Original Full-Res JPEG version from NASA


Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Date/TimeThumbnailDimensionsUserComment
current19:47, 22 August 2009Thumbnail for version as of 19:47, 22 August 2009700 × 512 (128 KB)84user{{Information |Description= {{en|1=two 591-second exposures of the rings of Neptune were taken with the clear filter by the Voyager 2 wide-angle camera on Aug. 26, 1989 from a distance of 280,000 kilometers (175,000 miles). }} |Source=[http://photojou
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