10-27-2010, 08:51 AM
[quote name='ThomasD' timestamp='1288167853' post='3810']
I replied all the time without reading up the specs.
According to the D700 manual (p. 67 in the English version), this camera can write "uncompressed", "compressed", and "lossless compressed". The manual also tells something about the losses in image quality. There would really be no point in allowing for two options if both of them are lossy after all.
Nikon states that the lossless compression yields 20-40% reduction in file size. Try to apply some gzip, zip, 7-zip, or whatever you want to an uncompressed NEF and you will probably find that you can reduce file size by 20-40% or even more. You will agree that gzip or zip is lossless and that Nikon should be able to implement something similar in their cameras.
[/quote]
Do the raw converter programms (like ACR) uncompress the "lossless compressed" image data or use the produced NEF file as it is recorded by Nikon's compression algorithm? I ask this because first of all I don't know the answer; and second of all, zipping & unzipping is done by the same application, but here in NEF case the applications on the compression and uncompression side are different.
Kind regards,
Serkan
I replied all the time without reading up the specs.
According to the D700 manual (p. 67 in the English version), this camera can write "uncompressed", "compressed", and "lossless compressed". The manual also tells something about the losses in image quality. There would really be no point in allowing for two options if both of them are lossy after all.
Nikon states that the lossless compression yields 20-40% reduction in file size. Try to apply some gzip, zip, 7-zip, or whatever you want to an uncompressed NEF and you will probably find that you can reduce file size by 20-40% or even more. You will agree that gzip or zip is lossless and that Nikon should be able to implement something similar in their cameras.
[/quote]
Do the raw converter programms (like ACR) uncompress the "lossless compressed" image data or use the produced NEF file as it is recorded by Nikon's compression algorithm? I ask this because first of all I don't know the answer; and second of all, zipping & unzipping is done by the same application, but here in NEF case the applications on the compression and uncompression side are different.
Kind regards,
Serkan