Learn more about the upcoming holiday with these free printable Labor Day activities pages. They include lots of games, coloring and more!

Lazy Load XT uses Data-URI-encoded transparent image for images outside of viewport (though this image may be visible during fast page scroll or in print preview).

Currently, print-scan-resilient watermarking algorithms remain a challenging research direction. In the industrial field, there is a huge demand for copyright protection of trademark images, which are ...