![]() You will always have to live with aliased edges where the edges meet transparent areas in Gif. In short, it is a limitation of the Gif format. The result is often a white aliased edge surrounding the graphic where the original semi-transparent anti-aliased pixels sat. And as such, when you export a semi-transparent pixel to Gif, the software must multiply that pixel with the background matte colour (which in most software can be selected during export). It is either on or off, with no in-between transparent values possible. Selecting a region changes the language and/or content on amend Nick's answer: Gif images only support 1-bit transparency. If you open an existing GIF or PNG‑8 file, it will have a custom color palette. (This palette is also called the web‑safe palette.) Using the web palette can create larger files, and is recommended only when avoiding browser dither is a high priority.Ĭustom Uses a color palette that is created or modified by the user. This option ensures that no browser dither is applied to colors when the image is displayed using 8‑bit color. Restrictive (Web) Uses the standard 216‑color color table common to the Windows and Mac OS 8‑bit (256‑color) palettes. Most images concentrate colors in particular areas of the spectrum. For example, an image with only the colors green and blue produces a color table made primarily of greens and blues. Selective is the default option.Īdaptive Creates a custom color table by sampling colors from the predominant spectrum in the image. This color table usually produces images with the greatest color integrity. Selective Creates a color table similar to the Perceptual color table, but favoring broad areas of color and the preservation of web colors. Perceptual Creates a custom color table by giving priority to colors for which the human eye has greater sensitivity.
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