photo : sebastien lebrigand  (france)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/77035235@N04">sebastien lebrigand</a> from crépy en valois, FRANCE
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/sebastro/15157469056/">Software processing of image (result)</a>