jmahto Posted April 14, 2015 Share #1 Posted April 14, 2015 (edited) Advertisement (gone after registration) Whenever I edit a DNG outside LR (using Photoshop CC), the resulting TIFF file is so much larger than the original compressed DNG? Even after specifying zip compression (in save preferences for tiff). Although disk space is not an issue and I do edit only handful of pictures outside, I am curious about this bloat. For a picture (using M240) with high frequency details (lots of trees), the tiff size is above 100M, while compressed DNG is around 20 to 30M!! Edited April 14, 2015 by jmahto Quote Link to post Share on other sites More sharing options...
Advertisement Posted April 14, 2015 Posted April 14, 2015 Hi jmahto, Take a look here Why TIFF is so much larger than compressed DNG?. I'm sure you'll find what you were looking for!
sandymc Posted April 15, 2015 Share #2 Posted April 15, 2015 The DNG is a raw file. So it contains Bayer matrix data that has only one value (red or green or blue) per pixel. The TIFF has been demosaiced, so it has three values per pixel (red AND green AND blue). That's a factor of three difference right there, even before compression. Sandy 5 Quote Link to post Share on other sites More sharing options...
250swb Posted April 15, 2015 Share #3 Posted April 15, 2015 I am curious about this bloat. !! Not bloat, this is where your quality comes from. Steve 1 Quote Link to post Share on other sites More sharing options...
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