Joshua Jackson Posted December 27, 2008 Share Posted December 27, 2008 I'm attempting to learn more about digital color correction and I'm currently mastering my images in linear and vid spaces. I've had success converting vid spaces to linear and have had good results in color mastering, but I'm having difficulty finding out what "floating point" means exactly. Any clarity on this would be appreciated. Link to comment Share on other sites More sharing options...
Premium Member Paul Bruening Posted December 27, 2008 Premium Member Share Posted December 27, 2008 Instead of being useful, I'm dumping a Wikipedia link on ya'. http://en.wikipedia.org/wiki/Floating_point Link to comment Share on other sites More sharing options...
wolfgang haak Posted January 6, 2009 Share Posted January 6, 2009 Hi Joshua, You will have heard the term "bit depth". This refers to the value range available to encode each colour channel. A 8 bit image contains 8 bits per channel, so 28 = 256 values. This allows for 2563 = 16m colours. To store and organize this data on a computer, you will choose an unisgned integer format, nice and simple. For Bit depth, which are larger, i.e 32 bit = 232 values per channel. To store that amout of data, you need a better container, as an integer runs out pretty quick (in programming variables can not take infinetly large values) so you need something a bit better suited for the job. The variable type used here is a Float (Float32). or half float (Float16) with 32 bits and 16 bits respectively. The terms used in the post packages here refer to the data types used to store the information and in a float you store greater numbers. Unless a specific package makes ambigous use of terms, the word float has no bearing on colourspace, linear/encoded gamma etc. Use it like "massive" vs half float that means "big" and integer that means "standard" Hope it helps, regards, Wolfgang Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted January 6, 2009 Premium Member Share Posted January 6, 2009 This may also shed a little light on why floating-point is used: http://www.openexr.com/about.html Link to comment Share on other sites More sharing options...
Joshua Jackson Posted January 7, 2009 Author Share Posted January 7, 2009 Excellent. Thank you both. That answers it perfectly. Link to comment Share on other sites More sharing options...
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