Compose a collage from overlapping image parts. In contrast to Hugin, this is not intended for creating panoramas from multiple photographies, but instead is specialised to creating highly accurate reconstructions of flat but big image sources, like record covers, posters or newspapers. It solves the problem that your scanner may be too small to capture a certain image as a whole. There are two versions of the program: A version using LLVM via the knead package: Enable it with the Cabal flag -fllvm. A version using CUDA via accelerate-cuda: Enable it with the Cabal flag -fcuda. Both of them have their individual installation difficulties. Restrictions: Requires that all input pictures use the same color space and that color channel depth is 8 bit. Images must be approximately correctly oriented. May have problems with unstructured areas in the image.