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WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!?

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WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? SKat 4/20/09 11:58 AM
I just started using Picasa.  I tried to upload my pictures to the Web using Web Albums.  I checked the 'original size' upload box.  And yes, the *pixel size* is the same, but the *FILE SIZE* is much smaller!  Anywhere from a half to a third of the KBs!  I make no edits in the Picasa program.  In fact I do nothing to the pictures in Picasa other than arrange them in order and add captions to some of them.  Why is this happening!?2009-04-20

The size of one of my albums on disk is 299 MBs.  The size of that Album on the Web is 110 MBs!  Half the reason I uploaded the pictures was to make prints.  Why the heck would I make prints out of massively compressed files?
2009-04-20

I know Don already verified this in his second message.... but I'll go one step further.  Non-rotated images, with no captions added, which were newly added to Picasa, were nevertheless compressed when uploaded to the web on the so-called 'Original Size' setting, provided that I looked at the picture in Picasa 3.
2009-04-20

I did some more tests.  The bug still exists, and it appears to compress most pictures unedited pictures even if they are not double clicked on.

Re: WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? Don Lind 4/20/09 12:50 PM
Read the forum - the answer is in here already...  :-)

But yes, I think the documentation should be clearer on this.  And, I think maybe there should be a "quality" setting on the Web Albums upload dialog.

I'll suggest that you DO have edits on the photos...  Maybe just rotations?   I doubt having added captions would trigger any of what follows...

If you upload to the web albums at the "Original Size" setting and you have NO edits at all, you'll be uploading exactly the photos you have on disk.

If you have ANY unsaved edits (rotations, contrast, crop), and you have NOT saved your changes to disk (updating the JPEGs on disk), Picasa has to create new versions of the JPEGs for uploading purposes (so as to include your unsaved edits).

When Picasa does this on-the-fly edit application for web albuims uploads, it dials in a little more JPEG compression than the original photo had - under the premise, apparently, that this is for "sharing" and it's a good and reasonable tradeoff... preserving space up at the web albums site and all that.   And, in reality, the additional compression will likely be unnoticable on a print - unless you get 8x10 prints or something like that... 

BUT - you can always save your edits to disk - either EXPORT them or click the "Save to Disk" button for the folder or album.   The "Save to Disk" will use the same JPEG compression settings as the original photo - generally giving you a photo that is about the same size, MB wise (unless you've cropped of course).   The "Export" lets you explicitly specify a "quality" setting (which equates to the amount of JPEG compression).   Either way, once you've applied the edits to a set of JPEGs on disk, you can then upload those photos at "Original Size" and you'll have exactly what you wanted.

Don
Re: WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? Don Lind 4/20/09 12:59 PM
And wow... yeah....  I'm surprised... there does appear to be a bug.

What I described above is how it did work .

But I just took a photo, undid all the edits, so that the copy on disk was all there was.
I did an upload... and it turned a 2.5MB JPEG into a 800KB JPEG.

Something strange is going on.

I didn't verify SKat's idea... but I'm very surprised that my "undo" didn't result in a full-size, no added compression upload.  

HMMM...

Don
Re: WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? Don Lind 4/20/09 4:04 PM
OK, I just created a new folder with one photo in it.
The photo was 3.4MB.
Picasa found the folder and the photo.
I viewed the photo in Picasa's edit mode but made no changes.
I clicked the "Upload" button.
The photo was correctly uploaded as a 3.4MB photo.

So, it doesn't seem to be related to simply going into "edit mode" on a photo.

And once I did a rotate on the photo, the upload was a more compress version.

I then "un-rotated" the photo (did another rotate that un-did the previous rotation).
A subsequent upload posted a the full 3.4MB version.

OK, then, I took that photo, did a fill light, auto-contrast, and auto-color edit.
Then, I went back and did "undo..." on each of those three edits.
Then, I did the upload of the photo that now had no un-saved edits... And... 3.4MB upload... no extra compression.

THEN, I went back and found another photo that had been saved and cropped.   I undid the save and the crop edit (it was the only edit on that photo).
When I posted that photo at "Original Size", the upload was more compressed.

But then I went and took a new, fresh photo,  cropped it, looked at a couple of other photos, came back and un-cropped it, and then uploaded... and....  full size upload...
Then, same thing, except I saved it after the crop... and then undid the save and the crop...  still got a full size upload... no extra compression.

I took another photo and WAS able to reproduce the problem... that one was saved, and had probably 5 separate edits done to it...    Very strange... 

So...  I don't know for sure what's going on.     I saw it twice.... the unexplained extra compression.   I suspect there's SOME edit that's not being "undone" quite right - and that's triggering the "you've been edited so we'll do the recompression" thing...

Don

Re: WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? Magnum 4/21/09 11:45 AM
Hi Don & SKat --

I believe you're both on other threads related to this issue, but I just wanted to point any other users experiencing this issue to main thread for updates:

http://www.google.com/support/forum/p/Picasa/thread?tid=63dfa3eed0b9a3b4&hl=en

Thanks,

Magnum
Re: WHY IS PICASA COMPRESSING MY PICTURES even on the original file size setting!? paulita258 4/30/09 12:02 PM
So Don - I have a problem because I do want to print to 8x10, 11x14, and some 16x20s....I was really psyched about using picassa to upload pictures and then print straight from Adorama without having to do another step of resaving and exporting.  Are you telling me that if I go beyond 5x7 pics that's what I'm going to have to do?