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The appearance of individual pixels and pixel blocks in a still or video image. For example, when a still image is displayed or printed too large, the individual, square pixels are discernible to the naked eye, especially around the edges where one color or shade of gray meets another. When digital video is played, the hardware may not be fast enough to keep up with the frame's encoding rate. Since digital images are compressed in blocks of pixels, one or more blocks may not be fully decompressed in time, which results in visible pixelation. See blocking artifacts, anti-aliasing and deinterlace.

Deliberate Pixelation
Images are often pixelated on purpose for special effects. For example, pixelation can be used to transition one frame into another, as well as hide nudity and sensitive data or camouflage a person's face. See videophile and posterized.

Unwanted Pixelation
The signal from the cable company was momentarily delayed, and the TV was unable to decode the frames fast enough to render them properly.

Pixelate On Purpose
Two Photoshop filters were applied to the top image to create special effects. The Mosaic filter created the left image, while the Crystallize filter created the one on the right. See image filter.
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References in periodicals archive ?
Among other notable works include Saudi artists Khalid Zahid's who shows simple joys of everyday life, Najla Abdulla's pixellated Mona Lisa and Yousuf Al Ahmed's works on skateboards.
Book One of the Gameknight999 series, Invasion of the Overworld: An Unofficial Minecrafter's Adventure is a fantasy adventure inspired by and set in the wildly popular video game Minecraft, in which players create and share elaborate, pixellated buildings.
Pixellated CCTV of the victim walking into the Premier Inn in Rhyl, Denbighshire, has been put on a campaign website under the heading "Too drunk to consent?".
Director Michael Mann's polished yet soulless action thriller is perfectly timed to tap into this mood of pixellated paranoia, convening a global task force to unmask a madman who wreaks havoc from his computer keyboard.
Designed and fabricated in Winnipeg, the wall will be manufactured of a thin weathering steel alloy called Cor-Ten steel, pixellated with thousands of tiny holes which, when backlit, produce an image that seems to move along the wall, which has effectively become a screen.
At Christie's London on 13 October, Lot 1 on the Monday evening saw 43 works from the Essl Collection go under the hammer, including one of Antony Gormley's 'pixellated' steel-block figures.
In June 1994 Holography News[R] reported on several systems launched or under development for production of digital or pixellated holograms.
People murmur to each other or sit silently, staring at the screens that show pixellated footage of ships, rescue rafts and yellow bobbing buoys.
Get ready for pixellated music videos on TV as govt covers up ' vulgar' content