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Fighting JPEG color banding

Alexander Karpinsky homm

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Fighting JPEG color banding
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@homm
homm / Default (OSX).sublime-keymap.json
Last active September 27, 2015 11:17
User key bindings for sublime text and modificated duplicate_line.py in /Packages/Default/duplicate_line.py
[
{ "keys": ["super+g"], "command": "find_under", "context":
[
{ "key": "selection_empty", "operator": "equal", "operand": false, "match_all": true }
]
},
{ "keys": ["super+c"], "command": "noop", "context":
[
{ "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true }
]
@homm
homm / forth_stack.v1.php
Created June 9, 2012 14:26
<?php
$input = '10 20 100 + - 20 * DUP 10 20 + *';
$t = microtime(1);
for ($i = 0; $i < 100000; $i++) {
$stack = array();
foreach (explode(' ', $input) as $chunk) {
switch ($chunk) {
@homm
homm / forth_stack.v2.php
Created June 9, 2012 16:31
<?php
function forth_calc($input) {
$stack = array();
foreach (explode(' ', $input) as $chunk) {
if ($chunk === '+') {
$stack[] = array_pop($stack) + array_pop($stack);
} elseif ($chunk === '-') {
$stack[] = array_pop($stack) - array_pop($stack);
@homm
homm / forth_stack.v2.py
Created June 9, 2012 14:53
from __future__ import print_function
import time
input = '10 20 100 + - 20 * DUP 10 20 + *';
t = time.time()
for x in xrange(0, 100000):
stack = []
for chunk in input.split(' '):
@homm
homm / pyjson.py
Created March 14, 2013 16:24
from __future__ import print_function
import re
ws_match = re.compile(r'[ \t\n\r]*').match
number_match = re.compile(
r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?[ \t\n\r]*',
(re.VERBOSE | re.MULTILINE | re.DOTALL)).match
nan = float('nan')
inf = float('inf')
@homm
homm / bench.py
Last active December 15, 2015 08:08
from PIL import Image
from timeit import repeat
from image import paste_composite
im1 = Image.open('in1.png')
im1.load()
im2 = Image.open('in2.png')
im2.load()
@homm
homm / bench.py
Last active December 15, 2015 08:49
#!/usr/bin/env python
from PIL import Image
from timeit import repeat
def prepare_test_images(dim):
"""Plese, be careful with dim > 32. Result image is have dim ** 4 pixels
(i.e. 1Mpx for 32 dim or 4Gpx for 256 dim).
"""
i1 = bytearray(dim ** 4 * 2)
@homm
homm / threadhell.py
Created June 16, 2013 16:34
Python thread test
import time
import thread
import urllib2
from yurl import URL
from bs4 import BeautifulSoup
class Spider(object):
def __init__(self, base_url, max_threads=50):
@homm
homm / run.sh
Last active June 18, 2016 10:47
#!/bin/bash -e
BRANCHES=( 3.2.0 new-filters resample-adaptve
v3.2.0.post1 v3.2.0.post3 resample-sse-next simd/resample-adaptive )
echo ">>> CPU INFO"
cat /proc/cpuinfo
virtualenv env
source ./env/bin/activate
@homm
homm / canvas.html
Last active June 28, 2016 01:25
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<canvas id="c"></canvas>
<style type="text/css">