YSlow開発者であり高速ローディングWebサイト構築テクニック紹介者であるStoyan Stefanov氏による画像最適化解説シリーズの第3弾がImage Optimization, Part 3: Four Steps to File Size Reductionとして公開された。そのまま画像圧縮に使えるテクニックが紹介されている。

When uploading photos to SNS or online storage, or attaching them to an email and sending them to someone, we want to keep the file size as small as possible, but on the other hand, we also want to ...

Crop extra space around the image to reduce its dimensions. When you prepare the GIF, reduce its output dimensions. Reduce the number of colors in the image. For animated GIFs, reduce the number of ...

Use Preview: Open the PDF in Preview, click File > Export, select “Reduce File Size” under Quartz Filter, and save. Use ColorSync Utility: Open the PDF in ColorSync Utility, click File > Export, ...