31 Aug
2011
31 Aug
'11
5:30 p.m.
On 8/31/2011 7:51 PM, Toby Thain wrote:
On 31/08/11 10:18 AM, Adrian Stoness wrote:
I don't believe Nikon or Canon (or others) have released the spec for
their RAW formats which differ per manufacturer.
Nikon claims to offer the spec and/or SDK to "bona fide" developers ---
but I have no idea how you might qualify for this distinction.
Nikon "encrypts" the white balance information using data from the other
publicly readable fields. It is trivially decrypted.
I'm pretty sure I've read photoshop books mentioning the fact that even
Adobe had (has) to reverse engineer the formats.
In any case, there are multiple websites that list the basic format of
the files, they are supported in most 3rd party programs, under dcraw,
and so on.
Adobe does have their Digital Negative .DNG, which is publicly
documented, the spec. available online and so forth. They push people to
convert their raw camera files to .DNG which is fine --- but of course
any proprietary extensions that Adobe doesn't reverse engineer or have a
corresponding field to is simply not copied and 'lost' in the conversion.
Keith
don't forget raw files
Do you mean Camera RAW? Yes that is a mysterious format, and has proven
difficult to reverse engineer, I believe.
--T