Recoverd jpg have smaller size than original jpg
Posted: 10 Jun 2015, 22:56
cgrenier, first I'd like to thank you for this great piece of software, it is about to help me with 2 HDDs from my NAS, which badly crashed.
I am just about to recover jpg from one of the HDDs. PhotoRec found already some hundred of them. The files seem to be ok with regard to the jpg format. A normal viewer like gwenview can open them.
However all of the recovered jpg are smaller than the original jpg - the former are between 50KB and 3MB - the later were around 15MB. I found three types of resolution: The recovered files have 640x480 px or 1920x1080 px or the 6016x4016 px. The original files all had 6016x4016px. And of course, the smaller the files the lesser the quality. Up till now I did not get a single file of full size + resolution + quality.
I could imagine that it was not possible to recover the full chain of file system blocks (ext4). But I would think that this would result in corrupt files.
The documentation says the files should be the same size or bit bigger than the original files. Otherwise they are omitted. But in my case this seems not to be true. Now I wonder if somewhere a recoding of the jpg happens instead of omitting them?
Could you please give me a hint whats going on?
Best regards.
I am just about to recover jpg from one of the HDDs. PhotoRec found already some hundred of them. The files seem to be ok with regard to the jpg format. A normal viewer like gwenview can open them.
However all of the recovered jpg are smaller than the original jpg - the former are between 50KB and 3MB - the later were around 15MB. I found three types of resolution: The recovered files have 640x480 px or 1920x1080 px or the 6016x4016 px. The original files all had 6016x4016px. And of course, the smaller the files the lesser the quality. Up till now I did not get a single file of full size + resolution + quality.
I could imagine that it was not possible to recover the full chain of file system blocks (ext4). But I would think that this would result in corrupt files.
The documentation says the files should be the same size or bit bigger than the original files. Otherwise they are omitted. But in my case this seems not to be true. Now I wonder if somewhere a recoding of the jpg happens instead of omitting them?
Could you please give me a hint whats going on?
Best regards.