Can I suggest there is a bit of 'cart before horse' danger? If I always took RAWs and my goal was to get my on-camera histograms more of a match to those RAWs, and I wasn't driven by a desire to match my RAW to the 'normal user's jpeg results' of my camera (which the base curve attempts to emulate), I think I would try:
a) Take some representative shots and then within dt see how these look with the various base curves available. These are after all only designed to match particular cameras jpeg processing and if I'm not interested in that I might as well pick the overall rendering I like the most. That doesn't even have to be a Canon base curve - just whichever one I like the look of. b) Then tweak the in-camera jpeg settings to get its histogram close to that my preferred base curve produces from RAW. Personally I don't ever look at the histogram on my camera so I don't do this, but if I was interested I would follow the above approach. Rob. -----Original Message----- From: Francesco Scaglioni [mailto:[email protected]] Sent: 14 June 2013 16:02 To: [email protected] Subject: [Darktable-users] Base Curve question Hi, Q : what is the methodology (for idiots please not maths) behind the derivation of the differing base curves? Reason : I use a modified picture style (Canon) very low saturation and low contrast to bring the on camera RGB histograms closer to the RAW histogram and would like to come up with a base curve that matches. TIA Francesco ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users The content of this email is private and confidential, and unless otherwise stated only the intended recipient may use the content of this email for its intended purpose. If you are not the intended recipient, you may not retain, copy, forward or disclose the information herein, and we ask you to notify the sender or contact our Customer Services department on 0844 633 1000 or at [email protected] The copyright and all other intellectual property rights subsisting in or to the contents of this email belong to NHBC or are used with the permission of the owner and all such rights are reserved. Recipients are asked to note that opinions, conclusions and other information in the contents of this email that do not relate to the official business of NHBC are neither given nor endorsed by NHBC. This email has been scanned for viruses, but NHBC does not accept any liability in respect of loss or damage caused by any virus which is not detected by its virus detection systems. Data Protecti on Act 1998. NHBC is the Data Controller for the purposes of the Act. Your personal details will be stored and processed in accordance with the Act for the purposes of dealing with your enquiry or claim and for research and statistical purposes. If you make a claim under a Buildmark policy you agree to your data being passed to others involved with your claim such as the original builder, or a consultant or remedial works contractor that we may employ in connection with your claim(s) and matter ancillary to your claim(s). Other than disclosure provided for in this statement, we will not pass any data about you to any other party without your permission unless we are required to do so by law. NHBC, the National House-Building Council, is a company registered by guarantee in England, registration number 320784, and it is authorised and regulated by the Financial Services Authority. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
