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File:Indian Head interlace.gif

Indian_Head_interlace.gif ‎(576 × 384 pixels, file size: 54 KB, MIME type: image/gif, looped, 2 frames, 0.1 s)

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Description
English: Demonstration of interlace and so-called "interline twitter", based on part of an RCA Indian Head Test Card ca. 1940. From left to right: progressive, interlace animation, and reconstructed using "bob" (interpolation per field) algorithm. Top row: original full-resolution image; bottom row: vertically blurred using [1 4 6 4 1]/16 kernel. Progressive images are darkened somewhat to match the effective brightness of the interlaced images.
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Interlaced, animated, retouched, and blurred. The original can be viewed here: RCA Indian Head test pattern.JPG: . Modifications made by Damian Yerrick.


This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
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Original upload log

This image is a derivative work of the following images:

  • File:RCA_Indian_Head_test_pattern.JPG licensed with PD-US-no notice
    • 2009-06-10T21:43:10Z Multixfer 1024x768 (418986 Bytes) Better resolution
    • 2007-10-04T21:10:13Z Night Ranger 330x251 (25785 Bytes) {{Information |Description=Source: http://www.high-techproductions.com/testpatterns.htm |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.org/w/index.php?title=Image%

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16 August 2009

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Date/TimeDimensionsUserComment
current07:53, 16 August 2009576 × 384 (54 KB)Damian Yerrick{{Information |Description={{en|Demonstration of interlace and so-called "interline twitter", based on part of an RCA Indian Head Test Card ca. 1940. From left to right: progressive, interlace animation, and reconstructed using "bob" (interpolation per fi

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