A brief description of I.C.E.: the integrated crystallographic environment

We describe the current status of the program I.C.E., the Integrated Crystallographic Environment. I.C.E. is a windows-based, menu-driven image processing package mainly aimed toward crystallographic image processing, although some of its functions have been used in analyzing single particle data and helical objects. The system can take individual images of crystals through the entire process of data analysis, from windowing the raw image through to the final evaluation of defocus, symmetry and creation of projection reconstructions. Current plans are to incorporate a three-dimensional database of images and electron diffraction patterns, and 3-D merging and visualization.