RE: Compressed Raw

[Llorenç Herrera <lha@xxxxxxxxxxxxx>]

Hi, this is correct about Nikon D-70, it compresses de RAW files. But it’s a non-degrading compression, nothing related to JPEG compression. It means that those RAW compression does not affects in any way the final image quality.

 

JPG, MPEG, MP3, OOG … etc. are all degrading-type compression techniques. The final result shows imperfections when looked very near (or heard paying lot of attention)

LZW, ZIP, RAR, Compressed-TIFF … etc are all NON-degrading-type compressiong techniques. The final result shows EXACTLY the same digital data you can see if it weren’t compressed.

 

I don’t know exactly, but I bet that the kind of internal compression Nikon uses on its RAW files is one kind of LZW.

 

I don’t know anything about Nikon D100

 

__________________

Llorenç Herrera Aznar

http://www.lorenzoherrera.com

http://www.fotopunto.com

 

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De: owner-photoforum@xxxxxxxxxxxxxxxxxxxxxx [mailto:owner-photoforum@xxxxxxxxxxxxxxxxxxxxxx] En nombre de Jerry McCown
Enviado el: viernes, 29 de abril de 2005 0:02
Para: List for Photo/Imaging Educators - Professionals - Students
Asunto: Compressed Raw

 

My D100 default setting is compressed raw and I had to go in and turn the compression off as it was taking WAY too long to save the file.

LScottPht@xxxxxxx wrote:

With the Nikon D70, the RAW images are compressed RAW images. I will have to go back and look at my manual, but I think it even says so in the manual. I'm not sure why the camera shoots compressed RAW images, perhaps others here could answer that.

 

Leslie

 

I don't think this is correct, RAW files are not compressed from what I understand