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PSD file size - can it be reduced?

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lostinbids
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Posted Wed Oct 1, 2008 6:12AM

Hi all, Is it possible to reduce a psd file size for electronic tranfer without degrading the image?


The image is a RGB 16bit product shot, the original layer is 'as shot' the other layer is isolated with the pen tool.  I have cropped around the subject to reduce the size and also tried putting the different layers in different files.  The isolated shot is still 70mb on its own in a seperate file.  Is there anything I can do?


Or would it be best to put a path around the isolated shot and save a jpeg?


Thanks jo
gariphic
Posted Wed Oct 1, 2008 8:27AM

By electronic transfer do you mean email or FTP?
You could always upload file to free online storage service: http://www.filedropper.com


Does archiving/zipping the file reduce size?
pink_cotton_candy
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Posted Wed Oct 1, 2008 8:28AM
does the person receiving the file need to edit the layers? If not, merging layers is the only thing I can think of. You can also save a flattened .tif file, that will stay 16bit.
lostinbids
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Posted Wed Oct 1, 2008 9:20AM

Hi gariphic - it is by FTP and I don't have the speediest conection in the world.


Hi pink - ideally he would need the different layers, but i did put them in different files (they aren't adjustment layers) and that only reduced to size to 70mb. 


I uploaded the jpeg so hopefully that will be ok.  
esp_imaging
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Posted Wed Oct 1, 2008 10:26AM
A compressed tiff should be rather smaller than the psd file, but unless you go to 8 bit jpeg I don't think you will get huge size reductions.
pink_cotton_candy
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Posted Wed Oct 1, 2008 10:53AM
is there a setting for jpg keep the layers? I'm pretty sure I can't save (CS2) a jpg at 16bit.
redhumv
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Posted Wed Oct 1, 2008 11:20AM
Posted By pink_cotton_candy:
is there a setting for jpg keep the layers? I'm pretty sure I can't save (CS2) a jpg at 16bit.


Nope ... you must convert to 8 bit to save as a JPG format and there is no method to preserve layers as a JPG.
SmpleJohn
Posted Wed Oct 1, 2008 11:39AM

What's the difference between 16 and 8 bit images?


Besides 8 bits <-- thought I'd throw that in for all the smart asses that are about to comment
justelaine
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Posted Wed Oct 1, 2008 3:24PM
Just call me curious--but why are you providing a product shot to a client in PSD format?
BlindMelon
Posted Wed Oct 1, 2008 4:03PM
Instead of making 2 layers, just use a layer mask.
redhumv
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Posted Wed Oct 1, 2008 4:46PM
Posted By SmpleJohn:

What's the difference between 16 and 8 bit images?


Besides 8 bits <-- thought I'd throw that in for all the smart asses that are about to commentwink


 


John - In a nutshell the 16 bit file contains a larger spectrum of color information. For a nice summary review the following article.


http://www.photoshop-tutorials-plus.com/8-bit-and-16-bit.html
azyr
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Posted Thu Oct 2, 2008 4:45PM

Save the path as a "path" rather then a layer, that should get some minor file size off. Make all layers invisible (turn off the eye for both layers i mean). Theese wont help a lot, but they will still decrease the file size a bit.


Next step is to compress the file. I would recommend using "7zip" to do the job, but you might as well go ahead and use Winrar or Winzip if thats more familiar. Both .tiff and .psd files can be compressed "hugely" because of the fact that they are saved "uncompressed" in the first place, thus leaving room for compression. Files like .jpeg's cant be compressed (maybe a little depending on the jpeg quality = compression) because they are a "compressed" format to begin with.


A second option is to save the file as a tiff, and use one of the compression options on the "tiff settings" dialog box that pops up on save. Some applications will have issues with compressed tiff's though, so its safer to just .rar it (or zip it whatever) and send it like that.


I'm not sure if the file size you will end up with will be sendable via email, as most mail servers wont let files larger then 5-10mb pass through them. So i would recommend uploading to a webDrive service, then sending the link to the customer. www.rapidshare.com has allways done the job for me, as long as the client manages to follow simple on screen commands.


 


As to why she would send a psd layered file to a customer, might be that the customer has asked for such a job of a photo? May be a designer him/herself? Who knows.


Good luck.
kemie
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Posted Fri Oct 3, 2008 2:31AM
This used to work quite a few versions ago, don't know if it still does. Oddly enough if you turn off the visibility (not delete) layers, file size goes down. not a huge amount, but noticeably.
azyr
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Posted Fri Oct 3, 2008 3:49AM
It still should, as it disables thumbnails (well just uses a white pic for thumbnails as there is nothing there). The thumbnails for psd files as far as i know are quite large, so it does help a little bit in file size.
P_Wei
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Posted Mon Oct 6, 2008 12:25AM
“Maximize Compatibility” dialog that appears when you save a PSD file...turn it off if you don't intend to share with older versions of photoshop.

This should chop off a good 25%-30% off the file size.


I also recommend Senduit.com for file transfers up to 100MB.

(Edited on 2008-10-06 00:27:06 by P_Wei)
lostinbids
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Posted Mon Oct 6, 2008 9:47AM

Hi Guys, thanks for all the replies.  I will give them a try. 


As to why I am sending a PSD, well I am the client but also the photographer, sending on to a designer.
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