{"id":203136,"date":"2017-03-17T08:27:13","date_gmt":"2017-03-17T06:27:13","guid":{"rendered":"http:\/\/mybroadband.co.za\/news\/?p=203136"},"modified":"2017-03-17T08:28:37","modified_gmt":"2017-03-17T06:28:37","slug":"google-guetzli-a-new-open-source-jpeg-encoder","status":"publish","type":"post","link":"https:\/\/mybroadband.co.za\/news\/software\/203136-google-guetzli-a-new-open-source-jpeg-encoder.html","title":{"rendered":"Google Guetzli &#8211; a new open source JPEG encoder"},"content":{"rendered":"<p><strong><a href=\"https:\/\/opensource.googleblog.com\/2017\/03\/guetzli-new-open-source-jpeg-encoder.html\" target=\"_blank\">Google Guetzli<\/a>\u00a0<\/strong>is\u00a0a new open source algorithm that creates high-quality JPEG images with file sizes 35% smaller than current methods.<\/p>\n<p>The smaller images will enable web pages to load faster and use less data.<\/p>\n<p>Guetzli produces smaller JPEG files and maintains compatibility with existing browsers, image processing applications, and the JPEG standard.<\/p>\n<p>\u201cThis is similar to our Zopfli algorithm, which produces smaller PNG and gzip files without needing to introduce a new format,\u201d said Google.<\/p>\n<p>The quality of JPEG images is directly correlated to its multi-stage compression process: colour space transform, discrete cosine transform, and quantization.<\/p>\n<p>Guetzli targets the quantization stage in which the more visual quality loss is introduced, the smaller the resulting file.<\/p>\n<p>Guetzli employs a search algorithm that tries to overcome the difference between the psychovisual modeling of JPEG&#8217;s format and Guetzli\u2019s psychovisual model.<\/p>\n<p>While Guetzli creates smaller image file sizes, the trade-off is that these search algorithms take longer to create compressed images.<\/p>\n<hr \/>\n<p>20 x 24 pixel zoomed areas from a picture of a cat\u2019s eye. Uncompressed original on the left. Guetzli (on the right) shows less ringing artefacts than libjpeg (middle) without requiring a larger file size.<\/p>\n<p><a  data-lightbox=\"post-image\" href=\"http:\/\/mybroadband.co.za\/news\/wp-content\/uploads\/2017\/03\/montage-cats-zoom-eye2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-203148\" src=\"http:\/\/mybroadband.co.za\/news\/wp-content\/uploads\/2017\/03\/montage-cats-zoom-eye2.png\" alt=\"montage-cats-zoom-eye2\" width=\"570\" height=\"240\" \/><\/a><\/p>\n<hr \/>\n<h3 class=\"my-4\">Now read:\u00a0<a href=\"https:\/\/mybroadband.co.za\/news\/software\/202944-new-family-link-app-from-google.html\">New Family Link app from Google<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Google&#8217;s Guetzli is a new open source algorithm that creates high-quality JPEG images with smaller file sizes.<\/p>\n","protected":false},"author":23,"featured_media":152157,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[167,41998,42000],"class_list":["post-203136","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","tag-google","tag-guetzli","tag-jpeg-encoder"],"_links":{"self":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/203136"}],"collection":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/comments?post=203136"}],"version-history":[{"count":2,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/203136\/revisions"}],"predecessor-version":[{"id":203164,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/203136\/revisions\/203164"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media\/152157"}],"wp:attachment":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media?parent=203136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/categories?post=203136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/tags?post=203136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}