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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.
Images should be uploaded in PNG or SVG format. PNG images should be around 600–720 dpi. A transparent background should be used. Images should still be readable when scaled down to 450 pixels to prevent conflicts with the Chembox. SVG images are desirable because they are infinitely scalable, while remaining compact.
MediaWiki converts the SVG image to a PNG image. The SVG format is the working format of the stored image so that people can more easily convert images for use in different languages. If you're using a browser other than Internet Explorer, just keep clicking the image and you'll eventually get the full-size image, which will be the SVG version ...
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.
The GNU Image Manipulation Program, commonly known by its acronym GIMP (/ ɡ ɪ m p / ⓘ GHIMP), is a free and open-source raster graphics editor [3] used for image manipulation (retouching) and image editing, free-form drawing, transcoding between different image file formats, and more specialized tasks. It is extensible by means of plugins ...
It takes only a few seconds to convert a PDF to an SVG, using nothing but free software. Go open source and free software! This tutorial assumes familiarity with installing programs and downloading, saving, opening and uploading files. This is a tutorial in various formats. Some parts are in question-and-answer format, as in FAQs.
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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 .
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