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Here is a list of the most common types of graphical formats:
| Format
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Extension
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Support
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| Windows Bitmap
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BMP
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Microsoft Windows
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| Graphics Interexchange Format
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GIF
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Navigator, Internet Explorer
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| Joint Photographic Experts Group
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JPG; JPEG
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Navigator, Internet Explorer
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The BMP extension is probably the most widely used image format in the IBM world. However, as
some people are now realizing, just because Microsoft® made it that way, does not mean it is
accepted as standard. However, Microsoft Paint® is probably the most accessible image design
tool available. In order to use graphics that are created in this format a conversion tool will
also be needed to convert the image to a GIF(pronounced gif) or a JPG(pronounced jay-peg). These
formats take up much less room than the BMP because they use compression algorithms to store their
bitmap patterns.
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So, what do you convert to JPG or GIF? Well, there really is no right answer. Each format has
its own inherent strengths and weaknesses. Below is a list of these retrieved from
Special
Edition Using HTML, by, Tom Savola
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GIF Advantages
- Widely accepted standard with native support in nearly all graphical applications
- Includes multimedia extensions for multi-image GIF files and sound file (MIDI) extensions
- Fast decompression
- Better with images using smaller color palettes
GIF Disadvantages
- Dithering (approximating a color by adding a pattern of dots over another color) is necessary
to create colors beyond the 256 color palette
- Fewer colors create palette conflicts when more than one image has to be displayed at the
same time
- GIF users are open to compression scheme copyright infringement claims (could result in higher
costs for Web browsers in the future)
JPG Advantages
- Smaller file size, which provides a better image transmission rate
- Supports "true color" 24-bit image representation
- Better with photographic quality (higher color palette) images
- Compression scheme is in the public domain and free to use
JPG Disadvantages
- Lossy compression scheme reduces image quality at higher compression levels
- Slower decompression (and therefore display) time
- Fewer graphical applications support JPEG file format
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