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How to compress cellular automata images
"don’t use lossy compression on images of Cellular Automata or in general, on highly structured artificial images with lots of fine details"
cellularAutomata  image  compression  lossy  lossless  PNG  JPEG  WebP  FLIF  clevermarks  WebPerf 
12 days ago by nhoizey
New(ish) Mirai Spreader Poses New Risks - Securelist
Keylogger (hosted as comments within jpeg files)

This botnet operator hosts components embedded within jpeg comments, a technique they have been using since 2013. These techniques provide very large file objects. So, even a fresh image downloaded by this bot of Taylor Swift contains 2.3mb of keylogging code first seen 2016.10.30 (ad0496f544762a95af11f9314e434e94)

code signing certificates appear to be stolen from a solar and semiconductor grinding wafer products manufacturer in Northwest China
keylogger  cybersecurity  jpeg  exif  botnet  certificates 
5 weeks ago by bwiese
NEON is the new black: fast JPEG optimization on ARM servers | Hacker News
libjpegturbo is a great choice if you need fast CPU JPEG encoding/decoding. It's a very near drop-in replacement for libjpeg, and it runs about 2x faster, mostly due to AVX/NEON optimizations.
jpeg  image  arm 
6 weeks ago by dhotson
NEON is the new black: fast JPEG optimization on ARM server
Useful resources
Arm Compiler armasm User Guide
Procedure Call Standard for the ARM 64-bit Architecture
ARM NEON Intrinsics Reference
Coding for NEON
Tagged with ARM, qualcomm, Performance, Polish, NEON
arm  jpeg  cpu  performance 
6 weeks ago by euler
cloudflare/jpegtran: jpegtran fork with significant performance improvements
GitHub is where people build software. More than 27 million people use GitHub to discover, fork, and contribute to over 80 million projects.
6 weeks ago by geetarista

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