We are creating BtoA tables for an output (printer profile): Input color space: Lab Output color space: CMYKOVG
Input Channels = 3 Output Channels = 7 CLUT resolution = 33 Total CLUT entries: 33 x 33 x 33 = 35937 When we examine other ICC profiles, they all contain 3 extra tables: 1. 3 x 3 XYZ to XYZ matrix that is normally set to unity matrix 2. Pre-processing matrix for linearizing input Lab values 3. Post-processing matrix for linearizing output ink values I am completely baffled by the length requirements for tables 2 and 3. When I examine a profile built with Profile Maker 5 (with multi-channel option), it used 514 entries in both tables. Other profiles I have checked use 256 entries for these tables. What are the rules (or rules of thumb) for deciding the length of these pre and post processing matrices? I have checked the ICC4 spec and found no help there. -- John Weissberg PerfectProof - Accuracy Made Easy ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
