Data Compression


Criteria

Survey Formats

Basics

Compression Methods

Data Formats

Files

Audio Data

Image Data

GIF

Colours

Data Compression

Characteristics

GIF87a

GIF89a

Patents

Optimizations

Colour Tables

Optimized Tables

Standard Tables

Raster

Anti-Aliasing

Examples

Drawings

JPEG

Video Data


Glossary

Index


Download


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GIF - Standard Colour Tables


The integration of an individual colour table is not inevitably necessary, instead a standard table my be used. Most applications provide such tables.


Some applications, like MS-Paint 5.1, apply these tables with the export into GIF in any case. The user does not have any influence; an automatic optimization does not take place.


If the picture uses colours not included within the standard, they have to be emulated with other available colours by a raster process. This may cause a strong impairment on the subjective impression.


It is recommended to work with applications offering an appropriate set of options. At "Examples" a GIF file generated with MS-Paint is provided and compared with optimized variants.


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 Examples 

GIF - Optimizations GIF - Optimized Colour Tables GIF - Raster