Carl Looper Posted November 26, 2022 Share Posted November 26, 2022 12 minutes ago, Robert Houllahan said: The data is stored in log format, directly corresponding to density of the original negative. Since the scanned material is likely a negative, the data can be said to be "gamma with log encoding". There is no suggestion in the posted description of cineon encoding that positives (as distinct from negatives) would be encoded in linear rather than log. Be it the density of negatives or the density of positives, density is defined as the log of reciripical transmittance. Why log encoding? Because, per bit, log encoding is more accurate than linear encoding. There is a claim that positives are encoded in terms of linear values. This may very well be true, but there is nothing in the posted description of cineon to suggest this is the case. So why post it? DPX (based on Cineon) supports both linear and log encoding (among others) so its not out of the question that DPX encoding of positives might be done in linear format. Either way it would be good to know what the actual practice is. By way of analogy, it would be good to know whether a list of numbers representing distances were provided in millimeters or inches. Quote Link to comment Share on other sites More sharing options...
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