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One color entry in a single GIF or PNG image's palette can be defined as "transparent" rather than an actual color. This means that when the decoder encounters a pixel with this value, it is rendered in the background color of the part of the screen where the image is placed, also if this varies pixel-by-pixel as in the case of a background image.
Pixelated image of a face. In computer graphics, pixelation (also spelled pixellation in British English) is caused by displaying a bitmap or a section of a bitmap at such a large size that individual pixels, small single-colored square display elements that comprise the bitmap, are visible. Such an image is said to be pixelated (pixellated in ...
Ordinary LCD screens already contain polarizers for control of pixel presentation — this can interfere with these techniques. In 2003 Keigo Iizuka discovered an inexpensive implementation of this principle on laptop computer displays using cellophane sheets.
The mosaic tiles of this human figure in the Saint Stephen Church in Umm ar-Rasas in Jordan have been rearranged by aniconists.. A black rectangular or square box (known as censor bars) may be used to occlude parts of images completely (for example, a black bar covering the eyes instead of the entire face being pixelized).
Typical sunglasses lenses are tinted for protection against bright light or polarized to remove glare; photochromic glasses are clear or lightly tinted in dark or indoor conditions, but turn into sunglasses when they come into contact with ultraviolet light. Most over-the-counter sunglasses do not have corrective power in the lenses; however ...
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