Hello everyone. My name is John and I am a student at Warsaw University of Technology in Poland. Recently I have been working on my project from calculating methodes in image processing. I am a fresh programmer in C++ (VS2012) I aim to develop RGB to CMYK convertion with using ICC profiles. I know that LittleCMS provide transform methodes but my supervisor adviced me to create my own methodes and then optimize it, so I need to dig deeper in ICC profile to create CMM conversion by myself.
Unfortunately from the beginning I have some problems and I would like to ask you for some help. I managed to read "B" Curves and Matrix from RGB ICC profile so I managed to convert from RGB to XYZ (PCS). Then I convert XYZ to LAB (XYZ2LAB methode) because LAB is color space of my CMYK ICC profile... and now I get stuck. 1. I cannot figure out what is CMM of my profile. As far as I know there should be some info in cmsICC Header struct (cmsSignature cmmId; CMM for this profile), but I can not figure out how to get this information. 2. I use cmsReadTag(hOutProfile,cmsSigBToA0Tag); to read BtoA0, and the number of stages in Pipline is 3 but I do not know if it is: B, Matrix, M; or B, CLUT, A; transformation. 3. Also I have a problem to get real data from Stages of Pipline, how can I recieve Curve or Matrix from this structure? Or I get the concept wrong. I will be very grateful for any comments and tips how can I get real/raw data to make a transform from LAB to CMYK by using Curves and Matrix. Thank you in advance for your help. Best regards, Jan Szczepanek ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available. Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
