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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. Just automatically converting to PNG will almost never produce a good image.
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.
Format Compression algorithm Raster/ vector Maximum Color depth. Indexed color Trans-parency. Meta-data. Inter-lacing. Multi-page Anima-tion Layers Color manage-ment
An SVG document can define components including shapes, gradients etc., and use them repeatedly. SVG images can also contain raster graphics, such as PNG and JPEG images, and further SVG images. This code will produce the colored shapes shown in the image, excluding the grid and labels:
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Original file (SVG file, nominally 42 × 57 pixels, file size: 2 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Date: 9 August 2007: Source: Created by bdesham in Inkscape. The image incorporates the Commons logo by m:User:Reidab.: Author: Benjamin D. Esham ()Permission (Reusing this file)As a courtesy (but not a requirement), please e-mail me or leave a note on my talk page if you use this image outside of Wikipedia.
Original file (SVG file, nominally 140 × 60 pixels, file size: 6 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.