Yes, I am an (amateur) photographer for the last 27 years, from film, DSLRs, mirror less, mobile. And I worked on camera ISPs - both hardware modules, saving RAW files on mobile for Google Pixel, as well as software processing of RAWs.
"Lossless Compressed means that a Raw file is compressed like an ZIP archive file without any loss of data. Once a losslessly compressed image is processed by post-processing software, the data is first decompressed, and you work with the data as if there had never been any compression at all. Lossless compression is the ideal choice, because all the data is fully preserved and yet the image takes up much less space.
Uncompressed – an uncompressed Raw file contains all the data, but without any sort of compression algorithm applied to it. Unless you do not have the Lossless Compressed option, you should always avoid selecting the Uncompressed option, as it results in huge image sizes."
Why make the distinction if there is no difference?
Apple is COMPRESSING the image. Period. RAW photos can be compressed, but if they are then they are "RAW Compressed" Files, not "RAW" files.Apple is not saying you are shooting RAW Compressed, it says you are shooting ProRAW photos, which is slick marketing because everyone thinks they are shooting RAW photos but ProRAW is not RAW. The iPhone 12 gave you a choice to shoot RAW or ProRAW, but my iPhone 13 ProMax only allows the ProRAW option. I have no option to avoid Apple processing my photos anymore.
It is semantics but words matter. If something is off with the compression algorithm or the processing how would you know?
More, if the difference did not matter, why does Sony go out of the way to explain the difference?
If a computer compresses and expands the image using an algorithm you are not getting back the same image. Period. I do not care if you perceive it to be the same, it is not the same.
> Why make the distinction if there is no difference?
There is a difference, which is that the compressed lossless version is smaller and requires some amount of processing time to actually be compressed or uncompressed. But there is zero difference in the raw camera data. After decompression, it is identical.
> If a computer compresses and expands the image using an algorithm you are not getting back the same image. Period. I do not care if you perceive it to be the same, it is not the same.
It is the same. You can check each and every bit one by one, and they will all be identical.
FollowingTheDao|1 year ago
So, fro example, Nikon typically provides three options for Raw: Compressed, Lossless Compressed and Uncompressed, as seen below:
https://photographylife.com/cdn-cgi/imagedelivery/GrQZt6ZFhE...
"Lossless Compressed means that a Raw file is compressed like an ZIP archive file without any loss of data. Once a losslessly compressed image is processed by post-processing software, the data is first decompressed, and you work with the data as if there had never been any compression at all. Lossless compression is the ideal choice, because all the data is fully preserved and yet the image takes up much less space.
Uncompressed – an uncompressed Raw file contains all the data, but without any sort of compression algorithm applied to it. Unless you do not have the Lossless Compressed option, you should always avoid selecting the Uncompressed option, as it results in huge image sizes."
Why make the distinction if there is no difference?
Apple is COMPRESSING the image. Period. RAW photos can be compressed, but if they are then they are "RAW Compressed" Files, not "RAW" files.Apple is not saying you are shooting RAW Compressed, it says you are shooting ProRAW photos, which is slick marketing because everyone thinks they are shooting RAW photos but ProRAW is not RAW. The iPhone 12 gave you a choice to shoot RAW or ProRAW, but my iPhone 13 ProMax only allows the ProRAW option. I have no option to avoid Apple processing my photos anymore.
It is semantics but words matter. If something is off with the compression algorithm or the processing how would you know?
More, if the difference did not matter, why does Sony go out of the way to explain the difference?
https://www.sony.com/electronics/support/articles/00257081
If a computer compresses and expands the image using an algorithm you are not getting back the same image. Period. I do not care if you perceive it to be the same, it is not the same.
lonjil|1 year ago
There is a difference, which is that the compressed lossless version is smaller and requires some amount of processing time to actually be compressed or uncompressed. But there is zero difference in the raw camera data. After decompression, it is identical.
> If a computer compresses and expands the image using an algorithm you are not getting back the same image. Period. I do not care if you perceive it to be the same, it is not the same.
It is the same. You can check each and every bit one by one, and they will all be identical.
ahoka|1 year ago
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