delimitry.blogspot.com
Délimiteur de données: Hack You SPb 2016 - Stegano 300 writeup
http://delimitry.blogspot.com/2016/10/hack-you-spb-2016-stegano-300-writeup.html
Saturday, October 22, 2016. Hack You SPb 2016 - Stegano 300 writeup. This task is by. Vlad Roskov (vos) and called Gemorroy (i. e. Hemorrhoid). We are given a png image:. I've written simple Python script to get all IDAT blocks from png image and decompress them. Open( 'steg300 where 8c7f6f7.png'. F: data = f.read() # get all IDAT blocks. Idats = [] while. True: idat pos = data.find( 'IDAT'. Idat pos 0: break. Size = struct.unpack( ' I'. Idats str = '. Join(idats) # decompress IDAT blocks. Therefore Ive ...
delimitry.blogspot.com
Délimiteur de données: December 2016
http://delimitry.blogspot.com/2016_12_01_archive.html
Thursday, December 22, 2016. Finally finished a book "Computer Networks" by Andrew S. Tanenbaum and Davis Wetherall. It is really good academic introduction for everyone interested in and works with computer networks. A good explanation of how the networks works on each level is given. All popular protocols, network security, encryption and compression algorithms are reviewed. This book helps to organize knowledge about all these issues. Highly recommend to look at this book. Sunday, December 4, 2016.
delimitry.blogspot.com
Délimiteur de données: June 2016
http://delimitry.blogspot.com/2016_06_01_archive.html
Tuesday, June 14, 2016. This weekend I've implemented own QR Code generator in pure Python. The link to github repository: https:/ github.com/delimitry/qr code generator. I want to share amusing QR codes I've found during testing of my QR code generator. A mode is "numeric", error correction level is "Q", here version is 20 (97 x 97), masks 0 to 7. Module size is 2 pixels. The encoded data contain only zeros, so the error correction codes also contain zeros. That's why the patterns are so uniform.
delimitry.blogspot.com
Délimiteur de données: April 2016
http://delimitry.blogspot.com/2016_04_01_archive.html
Thursday, April 28, 2016. Maximum lines of code for Python script. I've created a script with 10 million non-empty and non-comment lines. Python process has consumed over 10 Gigs of RAM, but successfully executed :). So what is the maximum lines of code permitted in Python? Sunday, April 24, 2016. Python frozen modules hello and phello. Under Python 2.7:. Import phello .spam. Under Python 3.x:. If check a file of this modules the next result will be returned:. Hello . file. Impis frozen(' hello '). Sunda...
delimitry.blogspot.com
Délimiteur de données: August 2016
http://delimitry.blogspot.com/2016_08_01_archive.html
Friday, August 26, 2016. Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp — Philip Greenspun. Organizations which design systems . are constrained to produce designs which are copies of the communication structures of these organizations — Melvin Conway. Sunday, August 14, 2016. Aztec Code generator in Python. Here are some resulting Aztec codes:. This is 71x71 Aztec code with 394 ' x00' bytes :. Поучительна...
delimitry.blogspot.com
Délimiteur de données: February 2016
http://delimitry.blogspot.com/2016_02_01_archive.html
Saturday, February 13, 2016. Octree color quantizer in Python. Some time ago I found interesting octree color quantization. Algorithm, previously often used in computer graphics (when devices can display only a limited number of colors), and nowadays mainly used in gif images. I've implemented one of the most used algorithm of octree color quantization in Python. Here is a repository on github: https:/ github.com/delimitry/octree color quantizer. Original image (24 bit):. Start at the level 0. If the nex...
aruslan.livejournal.com
Какие 60 FPS сейчас нужны - Valse oubliée
http://aruslan.livejournal.com/121520.html
Какие 60 FPS сейчас нужны - Valse oubliée. Какие 60 FPS сейчас нужны. Aug 24th, 2010 11:14 pm. Вышла объёмная статья про технологию Димы:. LucasArts' 60FPS Force Unleashed II tech demo. Дима "AND" Андреев мощно выступил на SIGGRAPH с показом зачем и как делать 60 FPS из 30. Real-time Frame Rate Up-conversion for Video Games. Слайды с комментариями, видео). Во многих компаниях прошла война споров "60 vs 30". Обычных аргументов - два: input latency (60 FPS рулит) и качество картинки (рулит 30 FPS). Сам по ...
delimitry.blogspot.com
Délimiteur de données: September 2015
http://delimitry.blogspot.com/2015_09_01_archive.html
Wednesday, September 16, 2015. Python ftplib storbinary hanging. Today I've spent several hours to find why python program is hangs sometimes. Using gdb I've found that sometimes ftplib's storbinary hangs at the end of file transfer. Gdb has shown that it hangs at:. In libc recv (fd=? N=8192, flags=-1) at ./sysdeps/unix/sysv/linux/x86 64/recv.c:33. I've added callback argument to storbinary to print last data block (by default blocksize is 8192):. Ftp = ftplib.FTP( self. Tuesday, September 15, 2015.
delimitry.blogspot.com
Délimiteur de données: Insidious CodeType, or from segfault to a working code
http://delimitry.blogspot.com/2016/12/insidious-codetype-or-from-segfault-to.html
Sunday, December 4, 2016. Insidious CodeType, or from segfault to a working code. Today I've made a 30-minutes blitz talk at ITGM with Andrey Zakharevich about a real problem with Segmentation Fault in CPython when special function has been generated. ITGM #9 - Insidious CodeType, or from segfault to a working code. Http:/ www.slideshare.net/delimitry/itgm-9-codetype-segfault (In Russian). View my complete profile. Insidious CodeType, or from segfault to a working . All around the world. Cyber fiber to .
delimitry.blogspot.com
Délimiteur de données: COUB popular songs analysis
http://delimitry.blogspot.com/2016/10/coub-popular-songs-analysis.html
Monday, October 3, 2016. COUB popular songs analysis. I've written simple script in Python to get all best of the week coubs. First version of the script was really slow. It required almost 5 minutes to get all 6084 coubs. So I've rewritten it using multiprocessing module for parallelism. And I got almost x6 speedup - multiprocessing version has taken just half a minute to get all 6084 coubs. Then I've used Counter from collections to get most common song titles. Here is statistics I got:. Cyber fiber to .
SOCIAL ENGAGEMENT