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@@ -1,17 +1,19 @@
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-## Inside a DNG file
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+## libdng
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-* SubIFDType 0 is the original raw data
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-* SubIFDType 1 is the thumbnail data
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-* The recommendation is to store the thumbnail as the first IFD
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-* TIFF metdata goes in the first IFD
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-* EXIF tags are preferred
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-* Camera profiles are stored in the first IFD
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+This is a library for making it easier to generate valid DNG files following
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+the Adobe Digital Negative specification. This library is written for writing
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+pictures created with [Megapixels](https://gitlab.com/megapixels-org/Megapixels)
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+but should be useful for any photography applications.
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-## Required tags
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+The documentation can be found on [https://libdng.me.gapixels.me/](https://libdng.me.gapixels.me/)
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-* DNGVersion
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-* UniqueCameraModel
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+Main features are:
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+* Writing DNG 1.4.0 compliant TIFF files
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+* Parsing DCP files for extra color processing metadata
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+* Some DNG reading support for the `dngmerge` utility
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+* Isolating applications from the changing libtiff APIs
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-## Neat tags
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-
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-* AnalogBalance stores the gains applied to the RGB channels by the sensor
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+This library also builds the `makedng` utility which allows generating a .dng
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+file by hand from a raw sensor dump so it can be loaded in regular image
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+processing software and a `dngmerge` utlity for combinding an existing DNG file
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+with new color calibration tags from a DCP file.
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Martijn Braam