ocr: 8. - Tips & Tricks Here are 5ome things you should remember when using the ICS software: Speed and LUT Cache ICS does use several types of LUTS (Look Up Tables) and interpolation in order to speed up color correction. Without LUIs even on a 68040 with HPU it could take days to color correct a DIN A4 sized scan. In order to get the job done much faster, ICS does precalculate a relativly small number of colors and all other colors are than interpolated during runtime. Everytime you start ICS with altered preterences, the LUT has to be recalculated causing a delay of up to several minutes. Once c ...