cite press release | publisher = Adobe Systems | date = Septem|title = Adobe Unifies Raw Photo Formats with Introduction of Digital Negative Specification | url = ] The same day, Adobe introduced Digital Negative to the market with its free of charge Adobe DNG Converter program. Its specification was announced on September 27, 2004. In digital photography, the Digital Negative ( DNG) file format is a royalty free RAW image format designed by Adobe Systems. I'm not sure what Adobe envisioned a linear dng would be used for, but it seems to be more of a marketing talking point for DXO than a real advantage.Container for = Metadata may be embedded in XMP, Exif or IPTC formats. But since the change instructions are proprietary and unique to Lightroom (and separate proprietary changes at Silkypix), you have no more 'portability' between software than you would with just using a tif or jpg file. The only 'advantage' I can see is if you like to embed your development instructions inside the body of the dng file itself and avoid the 'sidecar' file, a linear dng will allow that. Sure, programs that can open a Linear dng (my research indicates only Lightroom and Silkypix at this point) and create the illusion of developing a dng, but in the end, the possibilities in "Developing" a linear dng is no greater than that of using a 16 bit tiff file in a raw developer. All the almost endless processing potential in a raw file was thrown away to create the bit mapped file. It CAN'T treat it as raw, since it 'only' contains the single version of the bit mapped file. If someone sees an advantage that I missed, please speak up.īasically what DXO is doing, is creating that 16 bit color depth bit mapped file (and subsequently throwing away all that raw data that didn't get used to create the bit mapped file), and then 'wrapping that bit mapped image in a linear dng file.Įven Lightroom has to essentially treat that linear dng file as a 16 bit tiff file, and not as a raw file. I'm willing to bet just about any raw dng will work with ACDSee.Īs an additional reference, see this thread:Īfter thinking about your situation, and doing a little more research, I see no value in producing a linear dng at any time, even for interfacing with Lightroom. You might check with DXO tech support to see if it is capable of producing a raw dng. If I've understood what I've read, the DXO image displayed on screen is past the point of being a raw dng any more, and the only dng possible is linear at that point. They probably ought to update that section and make their dng support clearer.įrom what I've read, I think DXO is producing a Linear dng, even when interfacing with Lightroom. The ACDSee help file doesn't clearly state that it supports only raw dngs, but the context in which the help file refers to DNG, strongly implies a Raw dng environment. I suspect if they are Linear then ACDSee might have a problem with such a dng file. FEW software programs actually support Linear dng files. As I understand it, it is what gets created when you convert a tif file or a jpg to dng. It contains RGB image data converted to dng. Raw is the sort of dng that Lightroom and the Adobe raw converter create and which almost every program that claims to support dng is capable of using. It is possible that DXO dng files are incompatible with ACDSee (not sure, you really need to talk to tech support for a final answer though).ĭo you know what sort of DNG files your DXO program is producing? There are two types that I know of Linear and Raw.
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