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Image Processing and Workflow RAW, DNG , TIFF and JPG. From Capture to Ready for Publish/Display. All software and techniques used within an image workflow, (except extensive retouching and repair or DAM).

 
 
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Old August 4th, 2015, 09:25 PM
Doug Kerr Doug Kerr is offline
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Join Date: May 2006
Location: Alamogordo, New Mexico, USA
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Default Lossy compression DNG files

I have just become aware that there is such a thing as a lossy compression DNG file, which is smaller than the regular DNG file.

Using the Adobe DNG Converter on a CR2 file output by my Canon Powershot G16, where the CR2 file has a size of 14.6 MB, the regular DNG file has a size of 14.1 MB, and the lossy compression DNG file a size of 7.1 MB.

I have no idea how much of a compromise in the quality of the ultimately developed image might be encountered with the use of the lossy compression DNG file (or how we could even know).

The choice to use the lossy compression format for DNG files is found in the Preferences panel of the Adobe DNG Converter (accessible by pressing the Change Preferences button on the main page).

Best regards,

Doug
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