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Adobe Illustrator (AI) vector image format created in the Adoe Illustrator Bitmap an image composed of pixels with a fixed resolution Bitmap (.bmp) an uncompressed bitmap file format that is very large and is not appropriate for the web Brightness the measure of relative lightness or darkness of a color (measured as a percentage from 0% [black] to 100% [white]) Compression encoding data to take up less storage space and less bandwidth for transmission Feathering special formatting style that blurs the edge of an image Graphics Interchange Format (.gif) compressed bitmap file format (lossless) that supports only 256 colors and is appropriate for the web; supports transparency and animation Joint Photographer Experts Group (.jpg) a compressed bitmap file format (lossy) that is preferred for photographs; supports 16 million colors and is appropriate for the web; does not support transparency or animation Layering a feature that allows you to place one image on top of another and edit each independently Lossless a compression formula that reduces the file size without data loss Lossy a compression formula that reduces the file size by removing certain pixels Masking hiding part of a layer so that you can manipulate only the visible parts of the layer Portable Network Graphics (.png) compressed bitmap file format (lossless) similar to the gif format; it is not limited to 256 colors, is appropriate for the web, and supports transparency Rasterize converting vector objects in an image to raster (bitmap) content Red Eye Reduction a photo editing technique to remove the red from the eye Shape a design element that includes geometric, natural, or abstract shapes Special Effects the effect or impression used to produce materials that cannot be achieved by normal techniques Tagged Image File (.tif) uncompressed bitmap file format that supports 16 million colors; supports transparency, file size is very large, and is not appropriate for the web Text a multimedia element consisting of alphanumeric characters Transparency a visual quality in which a distant image or element can be seen through a nearer one Unzip decompressing a zipped file Vector an image created by using a series of mathematically defined lines and curves rather than pixels, making the image easier to rescale; also called draw-type graphics Windows Metafile (.wmf) Microsoft's vector file format; most Microsoft clip are are metafiles and can be edited Zip compressing files to reduce file size