Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Jyrki Alakuijala is active.

Publication


Featured researches published by Jyrki Alakuijala.


data compression conference | 2012

Gipfeli - High Speed Compression Algorithm

Rastislav Lenhardt; Jyrki Alakuijala

Gipfeli is a high-speed compression algorithm that uses backward references with a 16-bit sliding window, based on 1977 paper by Lempel and Ziv, enriched with an ad-hoc entropy coding for both literals and backward references. We have implemented it in C++ and fine-tuned for very high performance. The compression ratio is similar to Zlib in the fastest mode, but Gipfeli is more than three times faster. This positions it as an ideal solution for many bandwidth-bound systems, intermediate data storage and parallel computations.


Archive | 2013

Image Compression Using Sub-Resolution Images

Jyrki Alakuijala


RFC | 2016

Brotli Compressed Data Format

Jyrki Alakuijala; Zoltan Szabadka


Archive | 2014

Personalized summaries for content

Jyrki Alakuijala; Alexander Lyashuk


Archive | 2008

Optimized backward reference selection with reduced entropy for image compression

Jyrki Alakuijala; Hannu Helminen


Archive | 2013

ADVERTISEMENT VOTING-BASED CAMPAIGNS IN SEARCH

Tilke Judd; Ardan Arac; Peter W. Dickman; Zaheed Md Shahjahan Sabur; Alexandru Ovidiu Dovlecel; Eduardo Jodas Samper; Marvin Chow; Abraham Moolenaar; Jyrki Alakuijala


arXiv: Computer Vision and Pattern Recognition | 2017

Guetzli: Perceptually Guided JPEG Encoder

Jyrki Alakuijala; Robert Obryk; Ostap Stoliarchuk; Zoltan Szabadka; Lode Vandevenne; Jan Wassenberg


Archive | 2014

Display panel or portion thereof with animated computer icon

Tilke Judd; Jyrki Alakuijala; Alexandru Ovidiu Dovlecel; Zaheed Md Shahjahan Sabur; Abraham Moolenaar; Peter W. Dickman; Marvin Chow; Ardan Arac


Archive | 2014

Supporting voting-based campaigns in search

Tilke Judd; Jyrki Alakuijala; Alexandru Ovidiu Dovlecel; Abraham Moolenaar; Peter W. Dickman; Zaheed Md Shahjahan Sabur; Ardan Arac; Marvin Chow; Eduardo Jodas Samper


Archive | 2013

Spatially aware sub-pixel rendering

Jyrki Alakuijala

Researchain Logo
Decentralizing Knowledge