Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

libs/gil/test/extension/io/images/png/PngSuite/readme.txt

# Copyright (C) 2013 Christian Henning
# Distributed under the Boost Software License, Version 1.0. 
# See www.boost.org/LICENSE_1_0.txt

test images can be found at http://www.schaik.com/pngsuite/pngsuite.html

if not available please send me an email at chhenning ** at ** gmail.com