Was determined to be the best solution for the specific animation. Though often it will also generate a Cleared FrameĪnimations or Pure Overlay Animations, if that The result is generally a Mixed Disposal Animation Which will try to find the smallest sub-frames overlay images, using any GIF ' OptimizeFrame' is designed to be a GIF Frame Optimizer, That is, it will only work with Overlay Animations. Specifically whenĪn animation clears any colored pixel to transparency. HoweverĮxamples of the previous section, this operator does not work with all GIFĪnimations when transparent pixels are involved. Method will produce a basic frame optimization for a GIF animation. Naturally that means any hand optimizations that may have existed are also Optimizations are typically always removed first by using " -coalesce" operation. Multiple parts, or update actions, bring about a more complex but moreīecause of the complexity of doing frame optimizations, any existing frame Not only that but it is possible to split up the overlays into Handle the last frame displayed, and that can result in different size However there are different disposal methods available in the GIF format to Also overlaying a smaller frame means the client computerĭoes not have to do as much work in changing pixels on screen. This obviously producesĪ smaller number of pixels and thus a smaller file on disk, to being sentĪcross the network. Rather than a complete overlay of the whole image. This is the plan, and the goal that this IM Examples section, was lookingįrame optimization is based on overlaying a smaller sub-image This option will also likely become quite slow. 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
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |