Image: Indian Head interlace
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Indian_Head_interlace.gif (576 × 384 pixels, file size: 54 KB, MIME type: image/gif, looped, 2 frames, 0.1 s)
Description: 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.
Title: Indian Head interlace
Credit: RCA_Indian_Head_test_pattern.JPG
Author: RCA_Indian_Head_test_pattern.JPG: RCA derivative work: Damian Yerrick (☎)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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