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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 / BitmapScaleBench.cpp
Created November 2, 2016 23:57
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
#include "SkBlurMask.h"
#include "SkCanvas.h"
@homm
homm / recursive_scandir.py
Created July 16, 2016 22:41
from scandir import scandir
def recursive_scandir(dir):
stack = []
it = scandir(dir)
while it or stack:
it = it or stack.pop()
try:
item = next(it)
@homm
homm / memory.py
Last active July 14, 2016 04:32
#!/usr/bin/env python
from __future__ import print_function
import sys
import gc
from scandir import scandir
def recursive_scandir(dir):
stack = []
@homm
homm / ImageMagickTest.sh
Last active July 5, 2016 11:22
Graphic Benchmarks
#!/bin/bash
SRC=$1
RUNS=5
IM="~/ImageMagick8/bin/convert -bench $RUNS -limit thread 1"
# IM="gm benchmark -iterations $RUNS convert -limit threads 1"
RES="2>&1 | grep '=>/dev/null' | grep -Po '\d+:\K\d+\.\d+' | sort | sed '3!d'"
echo -n "Triangle 16x16 "
eval "$IM -verbose $SRC -filter Triangle -resize 16x16! bmp:/dev/null $RES"
@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">
@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 / 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 / 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 / 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 / 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')