Hi Nicolas, I have been reading and testing some of your code, mainly the resampling part. It's great stuff! Thanks. Please read my comments. They are in random order and of different priorities: * You have created a clamp_channel_fn. Isn't that the same as gil's scoped_channel_value? * I would like to invite you to format your code with the appropriate headers into the boost format. I can help you here. * Can you use source code from the freeimage project and relabel it under the MIT license? * You define a vertical_flip algorithm. Did you notice gil's flipped_left_right_view? * I would move filters.hpp and filter_weight_table.hpp into your detail\ folder. * resample.hpp should include filters.hpp. * for writing test I recommend boost::test/ As, I said, I like your contribution. What do you think of adding it to my gil contribution subversion? This is place where people, including me, keep their submissions. I would add you as a member though you have the access permissions. The URL is http://code.google.com/p/gil-contributions/ . Another idea is to write a freeimage image reader and writer and add it to my gil::io_new project. What do you think of that? Regards, Christian