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Mozilla today announced the release of mozjpeg version 2.0. The JPEG encoder is now capable of reducing the size of both baseline and progressive JPEGs by 5 percent on average (compared to those produced by the standard JPEG library libjpeg-turbo upon which mozjpeg is based). Many images will see “significantly larger reductions,” Mozilla Chief Technology Officer Andreas Gal told TNW. When asked for a more specific number, he said that “up to 15 percent is not unusual.” The advances in the 2.0 release are possible thanks to trellis quantization, which improves compression for both baseline and progressive JPEGs without sacrificing…

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