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Forum Discussion
does Dropbox compressed photo files???
I'm sending full resolution photo files to clients instead of burning them on a disc, but I want to make sure they are the full resolution. I had a client that had pictures made at Walgreens, and the...
I uploaded a 107.5MB TIFF file to Dropbox using a desktop browser, then downloaded the file. I then compared the file in my download folder to the source file.
Both were exact matches down to the byte: 107,525,5436 bytes.
I then checked for JPG. Also an exact match 9,177,764 bytes.
Then I checked CR2 files (Cannon's proprietary file extension)
Drumroll...both files were 23,921,835 bytes.
If you are using some mobile app to upload your photos...switch to desktop if you care about such things, but blame the right party.
Last I checked, I do not work for Dropbox, nor do I own any stock. If you call someone a liar, you better be able to back it up at least as well as dropbox backs up your files.
@ Dave
I think you should test it yourself and not just repeat what you have heard from other people.
I also have an Android phone and I'm using the Dropbox automatic upload feature on my phone to sync my pictures with Dropbox.
And I do see a difference in file size when comparing pictures pulled directly of my phone with those that have been stored in Dropbox. The file sizes of the Dropbox pictures are consistently smaller than those pulled directly of my phone. The difference isn't very large but it is definitely there.
To give you an example:
File downloaded from phone -> 5.18 MB (5.438.227 bytes)
Same file downloaded from Dropbox -> 5.04 MB (5.295.779 bytes)
So about 2.5% smaller. And this is about the reduction i see with all my other pictures too.
The resolution of the pictures hasn't changed though and even upon close inspection I can't discern any difference in image quality.
But the fact remains that picture files do get changed when they are automatically uploaded to Dropbox from an Android phone.
And I for one would like to know why and what happens to them exactly.
