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Including layers will increase file size?

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  #1  
Old 02-28-2011, 05:26 AM
bestremera bestremera is offline
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Including layers will increase file size?

Very confused and need some help.
Why does this popup appear when saving tiffs that have no layers?
I've been processing images, first in Photomatix, save as 16bit tif, then open in RAW, make some changes, save as grayscalle, then finish in Photoshop CS3.
I change the Mode from grayscale (a RAW conversion to b&w in Bridge) to RGB and from 8bit to 16bit.
Most images close without issue after these changes and adding the word 'final' to the image file. No problem.
But sometimes, I get the popup alert when closing that 'Including layers will increase file size', even though there are no layers. It makes the file size jump from 65mb to 130mb.
It must be a function of the tif saving options dialogue box but I have no idea what I am doing differently to cause this to happen.
Thanks for the help.
Bob
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Old 02-28-2011, 08:17 AM
creativeretouch creativeretouch is offline
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Re: Including layers will increase file size?

Quote:
Originally Posted by bestremera View Post
Very confused and need some help.
Why does this popup appear when saving tiffs that have no layers?
I've been processing images, first in Photomatix, save as 16bit tif, then open in RAW, make some changes, save as grayscalle, then finish in Photoshop CS3.
I change the Mode from grayscale (a RAW conversion to b&w in Bridge) to RGB and from 8bit to 16bit.
Most images close without issue after these changes and adding the word 'final' to the image file. No problem.
But sometimes, I get the popup alert when closing that 'Including layers will increase file size', even though there are no layers. It makes the file size jump from 65mb to 130mb.
It must be a function of the tif saving options dialogue box but I have no idea what I am doing differently to cause this to happen.
Thanks for the help.
Bob
Bob, I use CS3 as well and sometimes I have same problem. Usually I close the saving dialog and then do "flatten image" - and after this I can save my file without problems.
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Old 02-28-2011, 08:30 AM
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mistermonday mistermonday is offline
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Re: Including layers will increase file size?

The tiff algorithms work differently. They compress 8 bit images very well but most of the time 16 bit image file size will increase - up to 2x. Try saving as tiff with no compression for 16 bit.
Regards, Murray
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Old 02-28-2011, 08:35 AM
creativeretouch creativeretouch is offline
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Re: Including layers will increase file size?

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Originally Posted by mistermonday View Post
The tiff algorithms work differently. They compress 8 bit images very well but most of the time 16 bit image file size will increase - up to 2x. Try saving as tiff with no compression for 16 bit.
Regards, Murray
Murray, I keep my files uncompressed (16 bit) and occasionally I have this problem too.
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Old 02-28-2011, 08:52 AM
bestremera bestremera is offline
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Re: Including layers will increase file size?

I do use the 'no compression' option. I'll try the 'flatten image' trick. It will be interesting to see if I have that option if I have no visible layers to flatten!
Thanks, Bob
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Old 02-28-2011, 09:38 AM
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Der_W Der_W is offline
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Re: Including layers will increase file size?

If the only layer in your document is not the background layer (not a floating layer either), you'll get the warning.
Probably tiff saves the file differently when it thinks there are layers, than without layers (but double file size is pretty odd anyways!).

Instead of flattening first, you could as well use "Discard layers" option, that should do the same.
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Old 02-28-2011, 10:40 AM
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mistermonday mistermonday is offline
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Re: Including layers will increase file size?

As Jonas points out, if you have converted the background to a layer, it is cached and you either need to Flatten the file (that option will be available to you in the usual ways) or uncheck the save layers box in which case the Save as Copy will be automatically checked and you will recv a msg as a warning. Otherwise your saved tiff file will be twice the size as if you had saved it as a flattened tiff or .psd.
Regards, Murray
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  #8  
Old 02-28-2011, 11:07 AM
bestremera bestremera is offline
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Re: Including layers will increase file size?

I never tried to flatten the file after I got the popup because I did not have a visible additional layer. I see that PS might somehow 'add' a layer. I'll go home and see what happens if I flatten the file before trying to close.
Thanks, Bob
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  #9  
Old 02-28-2011, 06:16 PM
bestremera bestremera is offline
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Re: Including layers will increase file size?

Success. It seems PS creates a layer around the original image layer when I do certain, secret operations. 'Flatten layer' was an option that removed an outline around the image thumbnail of the 'layer 0'. All is right with the world.
Thanks, Bob
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Old 02-28-2011, 09:56 PM
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Janet Petty Janet Petty is offline
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Re: Including layers will increase file size?

Make sure that you also discard all alpha channels when you save as a tiff or other programs will not open them properly. The pictures will look as if they have cutouts in them or not open at all.

Janet
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