It is the collective name give to the four functions shown below: Digital ICE (Image Correction Enhancement) Digital ROC (Reconstruction Of Color) Digital GEM (Grain Equalization & Management) Digital SHO (Shadow and Highlight correction) - Digital ICE4 tools cannot be used with black & white film except Kodak Select Black & White 400, Kodak T400CN, and Ilford XP2 Super films that have been color processed. - Digital ICE is not recommended for use with Kodachrome film. - Digital SHO is applied only to images that have 8-bit color depth.