Quite. Unless you have a test strip in your photograph the image in dt can only tell the dynamic range of the image and nothing about how much of the original DR you captured. If you want that you'll either have to include a test strip or spot meter lots of points to simulate that test strip.
So whether this can be done in dt or does depend on what the OP meant by measuring the DR of 'fotos'. Measuring the DR of the resultant image, yes. Measuring the DR of the sensor, no - not without a test strip or other reference points. -----Original Message----- From: Markus Jung [mailto:maju.j...@web.de] Sent: 02 February 2015 14:03 To: darktable-users@lists.sourceforge.net Subject: Re: [Darktable-users] Determining dynamic range Am 28.01.2015 um 22:15 schrieb Oliver Bedford: > is it somehow possible to determine the dynamic range of a foto within > dt? I would like to compare the dynamic range of typical fotos I take > with numbers published by testing "authorities" like DxO. IMHO you can not do this without a reasonable test setup. You need some defined test-setup/target and lightsource and see how much of the dynamic range of your target is still covered by the RAW. I am pretty sure you can not tell anything about the dynamic range without a knowledge about the scenery you shot. Regards, Markus ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users This email is confidential and is intended for the addressee only. If you are not the addressee, please delete the email and do not use it in any way. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. NHBC reserves the right to monitor all email communications. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. NHBC, the National House-Building Council, is limited by guarantee in England, No 320784. Registered address: NHBC House, Davy Avenue, Knowlhill, Milton Keynes MK5 8FP. NHBC is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and Prudential Regulation Authority. NHBC Building Control Services Ltd, registered by guarantee in England with Company No. 01952969. Registered address: NHBC House, Davy Avenue, Knowlhill, Milton Keynes MK5 8FP. NHBC Services Ltd registered by guarantee in England, No 03067703. Registered address: NHBC House, Davy Avenue, Knowlhill, Milton Keynes MK5 8FP. If you make a claim under a Buildmark policy your personal details will be stored and processed in accordance with the Data Protection Act. Your personal details may be 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. ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
