![]() Ensure that images are optimized when you Git commit.ĭo you know of other ways to integrate image optimization in your workflow? If so, please share your ideas in the comments.Optimize images whenever they change with the Guard RubyGem.Extend OS X with folder actions and more using Automator.This gives us the levels of optimization of all three applications, with the convenience of the command line, opening up all kinds of possibilities for integration with other utilities: In one command, we can run our chosen images through all three optimizers - giving us automated, multi-stage image optimization right from the command line. Given a folder or other set of images, ImageOptim-CLI automates the process of optimizing them with ImageAlpha, JPEGmini and ImageOptim. Though other image optimization tools are available from the command line, ImageOptim-CLI exists because the current benchmarks suggest that ImageOptim, ImageAlpha and JPEGmini currently outperform those alternatives over lossless and lossy optimizations. This soon gets tedious: We need to automate! This is why (with James Stout and Kornel Lesiński) I’ve created ImageOptim-CLI, automated image optimization from the command line interface (CLI). This also means that your images don’t need to leave your machine either.īut at some point ahead of every launch, I had to remember to open each application, manually process new images, then wait for the tool to finish, before doing the same in the next application. You don’t need to upload and download files to a Web server, so there’s no risk of the service being temporarily unavailable. This has some benefits because everything is local. But there’s a real problem: all of these tools are GUI applications for OS X. In terms of performance, the comparative data is reassuring, and to date I’ve been happy with my decisions. The savings are quite remarkable, but you will need to purchase the software to use it without restriction. JPEGmini is a “patent-pending photo recompression technology, which significantly reduces the size of photographs without affecting their perceptual quality.” The creators claim it reduces a file’s size by up to 80%, while maintaining quality that is visually identical to the original. The conversion even maintains alpha-transparency in all browsers, including on iOS and even in IE 6. ImageAlpha is unique in its lossy conversion of PNG24 to PNG8, delivering savings many times bigger than popular PNG optimizers such as and TinyPNG. It works by finding the best combination of compression parameters and removes unnecessary comments and color profiles. ImageOptim beats any single lossless optimizer by bundling all of them. ![]() ![]() ![]() Each uses different techniques to deliver impressive savings, but they complement each other when combined to offer better savings still. With this trio, we have a specialist in JPEGs, another in PNGs, and a great all-round application, ImageOptim, which also supports GIF and other formats. I’ve been using ImageOptim for many years, with ImageAlpha and JPEGmini joining it more recently. However, how great a loss in quality is noticeableand how much is acceptable will vary from person to person, project to project and image to image. The report shows us how much data each tool saves and how much quality was lost statistically. To inform our work, I ran the most popular image optimization tools over a varied sample of images (kindly donated by Daan Jobsis via his “ Retina Revolution” article), and I’ve published the results on GitHub. Regardless of which you choose, you will likely speed up your website and keep users happy. If you’re not currently using any image optimization tool, I would urge you to choose one. How To Optimize Images With HTML5 Canvas.Efficient Image Resizing With ImageMagick.Thankfully, a number of popular tools can help us optimize images even further, but which should we use? We assumed, for a time at least, that our graphics editing software properly optimized our files, but what do we really know about our image optimization tools? Further Reading on SmashingMag: In fact, much more data is usually left in such files, data that browsers have to download despite not requiring or even using it, data that keeps our users waiting just a bit longer than necessary. Our eyes fixate on an image’s preview, carefully adjusting the quality and optimization settings until we’ve found that sweet spot, where the file size and quality are both the best they can possibly be.Īfter exporting the image - usually using a feature called “Save for the Web” - and having gone to all that care and effort, we would be forgiven for thinking that our image is in the best shape possible. Exporting images for the Web from one’s favorite graphics software is something many of us have done hundreds of times.
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