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Sometimes, you find a drawing or similar image useful for a Wikipedia article, that was saved as a JPEG but should have been saved as a PNG.JPEG is good for images where the color changes fluidly throughout the image, like in a photograph, whereas PNG files are good for images with relatively few colors, such as a drawing of a flag, a chart, or a map; note that sometimes SVG is better.
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6.0 and below have broken alpha-channel transparency support (will display the default background color instead). [ 84 ] [ 85 ] [ 86 ] 7.0 and below cannot combine 8-bit alpha transparency AND element opacity ( CSS – filter: Alpha (opacity=xx)) without filling partially transparent sections with black.
In addition, transparency is often an "extra" for a graphics format, and some graphics programs will ignore the transparency. Animated PNG 8-bit transparency. Raster file formats that support transparency include GIF, PNG, BMP, TIFF, TGA and JPEG 2000, through either a transparent color or an alpha channel.
In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1] It is often useful to render picture elements (pixels) in separate passes or layers and then combine the resulting 2D images into a single, final image called the composite .
Early on, an attempt was made to replace a fair use image by creating a logo to replace the removed image. You can see the result of this effort at Image:Oalogo2.jpg. As of this writing, that image is still in use on the userbox in question, which you can see at Wikipedia:WikiProject Scouting/Userboxes/Arrowman. Reaction to this image was mixed ...