Of course as many optimization steps may not be worth the effort for a Until then be careful of its use, especially in scripts as it will In other words, it is hoped that ' Optimize' will eventuallyīecome the IM generic GIF animation optimizer, for quick and easy use by IM Some type of Color Optimization technique.Įxactly what, is still to be decided, and may be selected depending on theĪnimation and the number of colors involved.YouĬan still do the semi-transparency handling yourself before hand to When saving to the GIF file format, to remove semi-transparent pixels. A 50% Threshold of the alpha channel, just as the IM does normally does.Include extra standard optimization steps, such as. The operator however is still in development, and in future is likely to also

' Optimize' operator should produce a good well optimized However for most GIF animations, involving cartoon like images, the Result in a worsening of the LZW compression ratio.

Where a Transparency Optimization will generally This is particularly true of an raw video sequence These are reasonably safe optimization steps that can be applied to mostĪnimation sequences, however there is no guarantee, that it will result inĪ smaller GIF animation.

and Transparency OptimizationAt which point you can immediately save the GIF animation.

Will discuss in detail below, to attempt to optimize a GIF animation in aĬurrently this option is equivalent to (in order). ' Optimize' will use a number of the techniques, that we General Purpose GIF Optimizer of ImageMagick Or you may loose the operators effect on the final GIF file save. Global Color Table has to be done as a the last step before saving to GIF Probably the hardest aspect of optimization that users have trouble with isĬolor Optimizations caused by the color limitations That however is not the order we will look at these optimization techniques.įor GIF animations Frame Optimization is the mostīasic optimization technique, and where the most gains can be made. When optimizing animation you should try to optimize them in the following The ability to use smaller 'sub-frame' overlays from one frame to the next. Restrictions, as well as a choice of different frame disposal techniques, and Optimizing an animation is not easy, especially a GIF animation that has color Where smaller sub-frame overlays can be used, as well as three types ofĭisposal methods controlling how an animation is handled. This is especially important for complex GIF animations These examples start to make use of the BasicĪnimation Handling, to try to optimize the final display and file size

Ordered Dithered LZW Optimization Minor Optimizations Other Sources of Information on GIF Optimization.

Dithering Colors Compression Optimization.

Speed Animation - an animation with too many colors.

Frame Optimization Results and Summary Semi-Transparency Handling Color Optimization.

Moving Hole Animation - a difficult to frame optimize animation.

No Pixel Overlay - repeated image every second frame.

Index ImageMagick Examples Preface and Index Introduction to Optimization General Purpose GIF Optimizer of ImageMagick Frame Optimization

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