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How To Design A Banner
Chapter 2: Choosing A File Format
Banner advertisements can be designed
using several common file formats including:
There are advantages and disadvantages to each format, for example:
- Only GIF and SWF allow animations (SWF allows quite sophisticated animations, whereas GIF simply allows a series of images to be displayed in series).
- All the formats can be used to display pictures, although generally
GIF, JPEG or
PNG would be favored, if this is all your want to do.
- GIF allows up to 256 colors, whereas JPEG or
PNG allow up to 16,777,216 colors.
- GIF or PNG are better than JPEG for displaying pictures which contain large areas of continuous tone, or very small text. This is because
GIF and PNG
are lossless formats, whereas JPEG is lossy and can result in loss of small details.
- JPEG is generally the best format for displaying photographs, although acceptable results can sometimes be achieved using GIF or PNG.
- There may be restrictions on when you can use some of the formats (especially SWF). This is because some
banner rotation scripts and
banner exchanges do not work with
SWF.
- The same banner design saved in different formats may produce different file sizes. Again, there may be restrictions on what format is suitable for your banner because of this - as if
buying banner advertising
or using banner exchanges, there may be limitations on the maximum file size allowed.
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