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Openclipart, also called Open Clip Art Library, is an online media repository of free-content vector clip art.The project hosts over 160,000 free graphics and has billed itself as "the largest community of artists making the best free original clipart for you to use for absolutely any reason".
This image has partial transparency (254 possible levels of transparency between fully transparent and fully opaque). It can be transparent against any background despite being anti-aliased. Some image formats, such as PNG and TIFF, also allow partial transparency through an alpha channel, which solves the edge limitation problem.
A PNG image can be stored in the image in the same way as done for a standard Windows BMP format image, with the exception that the PNG image must be stored in its entirety, with its file header and must be in 32bpp ARGB format. [7] Note: CUR files cannot use PNG image data and must use BMP image data as per ICOs. [7]
Description: Blank map of Europe * Source: Modification of SVG trace of PNG of the same name. Original PNG based on CIA map The World Factbook * Author: PNG author: San Jose, 19. July 2006. SVG trace by RedHotHeat 06 August 2006. Modification author: cthuljew, 21. January 2009. Date: 22 January 2009, 00:02 (UTC) Source: Derived from Blank_map ...
Currently available infrared transparent materials typically exhibit a trade-off between optical performance, mechanical strength and price. For example, sapphire (crystalline alumina) is very strong, but it is expensive and lacks full transparency throughout the 3–5 μm mid-infrared range.
Low-power reading glasses worn along with the paper glasses also sharpen the image noticeably. The correction is only about 1/2 + diopter on the red lens. However, some people with corrective glasses are bothered by difference in lens diopters, as one image is a slightly larger magnification than the other.
A glass building facade. Glass is an amorphous (non-crystalline) solid.Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics.