[EMAIL PROTECTED] wrote: > Firstly I'm currently doing a little bit work on digital camera > characterisation and I need to capture an image of a IT-8 chart. I > have had trouble getting PERFECTLY even illumination across the entire > chart with out any hint of specular reflections. The most common > arrangement is to have two lights angled at 45� over the chart with > the camera in between (a basic copy stand arrangement). Any > suggestions or improvements.
Movge the lights as far away from the camera as possible. Usually camera profiling can tolerate a deviance between RGB numbers of 3-4. Oyu could also try using a single light (slightly off camera axis), and potentially flags to control falloff. That said, it's unlikely an IT8 will give you whatg you are looking for. Camera profiles are a different ballgame, and usually requires targets with pigments of "real world" colour. Photographic dyes are very different, whicl will screw the profile. Have a look at one of the Gretag charts (Colorchecker 24, colorchecker DC or SG colorchecker (the lates and best one imho). > Best Regards, Thomas Holm / Pixl Aps - Photographer, Educator, Colour Management Consultant & Seminar speaker - Remote Profiling Service (Output ICC profiles) - www.pixl.dk � Email: th[AT]pixl.dk -- =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
