Retrospectiff is a common lisp library for reading, and, hopefully, one day, writing images in the TIFF (Tagged Image File Format) format. The git repository can be found at: https://github.com/slyrus/retrospectiff See the test directory for examples of using the read-tiff-file and write-tiff-file functions. The following types of images can be read and written: * bitmap images * grayscale images (8 or 4-bits per pixel) * RGB, and ARGB images (8- or 16-bits per pixel) The following compression schemes are supported: * None (uncompressed images) * LZW * packbits * deflate (read only) * JPEG (read only) Planned features include: * Writing more formats of TIFF images * Performance enhancements For additional examples of using the retrospectiff API, check out the opticl <http://github.com/slyrus/opticl> library.