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JPEGclub.org
JPEGclub.org develops new JPEG features and maintains the Independent JPEG Group's (IJG) software. The current version is release 9f of 14-Jan-2024. It is the only true source reference JPEG codec. New features and enhancements have been developed for the three major parts of the IJG library: the compression, the decompression, and the transcoding parts. These parts are represented by the three ma
syonx 2017/07/10
via - https://developers.google.com/speed/docs/insights/OptimizeImages?hl=ja

画像処理
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New jpegtran features
1. New jpegtran -scale lossless resize feature A new option has been added to the jpegtran tool and transcoding library: -scale M/N Scale output image by fraction M/N, eg, 1/8 Currently supported scale factors are M/N with all M from 1 to 16, where N is the source DCT size, which is 8 for baseline JPEG. If the /N part is omitted, then M specifies the DCT scaled size to be applied on the given inpu
syonx 2017/07/10
via - https://developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/image-optimization?hl=ja ◆ 新→ http://jpegclub.org/
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