Image credit:

Google veröffentlicht neuen JPEG-Algorithmus

Open Source und bis zu 35% kleinere Bilder
Ji-Hun Kim
03.17.17
0 Shares
Share
Tweet
Share
Save


Google hat einen neuen Algorithmus für JPEG-Bilder veröffentlicht, der auf den charmanten Namen Guetzli hört. Ein Open-Source-Algorithmus, der im Vergleich zu bisherigen Methoden JPEGs um bis zu 35 Prozent kleiner machen soll. Damit sollen vor allem Ladezeiten bei Webseiten verkürzt werden und wer wenn nicht Google hat Interesse an einem schnelleren Netz. Google selber beschreibt die Technologie hinter Guetzli so:

The visual quality of JPEG images is directly correlated to its multi-stage compression process: color space transform, discrete cosine transform, and quantization. Guetzli specifically targets the quantization stage in which the more visual quality loss is introduced, the smaller the resulting file. Guetzli strikes a balance between minimal loss and file size by employing a search algorithm that tries to overcome the difference between the psychovisual modeling of JPEG's format, and Guetzli's psychovisual model, which approximates color perception and visual masking in a more thorough and detailed way than what is achievable by simpler color transforms and the discrete cosine transform. However, while Guetzli creates smaller image file sizes, the tradeoff is that these search algorithms take significantly longer to create compressed images than currently available methods.

From around the web

ear iconeye icontext filevr