Average you

Published by: ganglio @ 17:15

Apr/11

It really looks like I cannot stay doing nothing.
I grabbed the script I use to download my posts for the Everyday app and changed it a bit so I could download plenty of other people pictures.
416 to be precise.

I averaged all of them and this is the result:

average you

Cool, isn’t it? It’s a sort of daily ghost :þ

If you fancy to give it a try here is the script I used to fetch the images:

<?php
$numpages=10;
$maxresults=100;
$baselink="http://search.twitter.com/search.json";
$query="?q=@everydayapp&result_type=recent&rpp=$maxresults";
for ($i=0; $i<$numpages; $i++) {
$results=json_decode(file_get_contents($baselink.$query));
foreach ($results->results as $kk=>$result) {
preg_match("/http:\/\/yfrog\.com\/([a-z-0-9]*)/",$result->text,$matches);
$hash=$matches[1];
if ($hash) {
$xmlInfo=simplexml_load_string(file_get_contents("http://yfrog.com/api/xmlInfo?path=$hash"));
$link=$xmlInfo->links->image_link;
$filename=explode("/",parse_url($link,PHP_URL_PATH));
$filename=$filename[3];
file_put_contents($filename,file_get_contents($link));
}
echo "P:$i R:$kk H:$hash\n";
}
$query=$results->next_page;
}
?>

and here is the console commands I used to calculate the average above and the standard deviation below:

convert samples/* -average average.jpg
for i in `ls samples`; do composite average.jpg samples/$i -compose difference diff/$i; done
for i in `ls diff`; do composite diff/$i diff/$i -compose multiply mult/$i; done
convert mult/* -average sd.jpg

standard deviation

The original SD image was quite dark so I normalised its histogram a bit with the GIMP.

fun

geek

grazia

se la media era oltre, la deviazione standard è da matti...wow, e meno male che avete anche una vita sociale altrimenti chissà cosa uscirebbe da queste geniali menti

2011-05-06 18:17:17