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size of tif files

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bvahan5

Programmer
Jun 11, 2005
63
RU
i was given a TIF file 8.5x11" 300 dpi
it was 3 Mb

i use PhoShop v.7
after minor change in file i saved it with same 300 dpi
and i got 33 Mb

it got 10 times more Mbs

what is the reason?

thanks for help
 
...tif compression i would say, you probably saved it without LZW compression after you made the amend...

...before you opened it, the file was probably compressed with LZW in the 'save as' dialog...

Andrew
 
thanks for promptly response

does compession lead to lose a resolution?
what are the negative sides of comression?
I have to print TIF files and want to have a good quality in print
 
There are no problems with LZW compression. You won't lose anything.

Depending on what you did to the pic, you might have gotten a warning when saving about flattening. If you don't flatten, the size jumps up mucho. I usually keep the working copy in psd unflattened, but send out a flattened tiff with lzw compression to printers, etc.



Using OSX 10.3.9 on a G4
 
I have to print TIF files and want to have a good quality in print

Printed where and how?

What exactly are you going to do with the picture?

 
I know Flatten in AI
where it is in PShop? (v.7)
 
...the quality of your tif images will also depend on how well the image is captured...

...it's resolution in relation to the linescreen used in litho print...

...if you scale it up in a layout application you will lose quality as the resolution reduces in this scenario...

...the paper you print on...

...the output device you use...

...whether the print provider even uses litho print or digital, film or CTP...

Andrew
 
>>> where it is in PShop? (v.7)

...flattening in photoshop depends on whether you have layers in your layers palette other than the background layer...

...you can flatten in the save as dialog or choose the flyout menu option in the layers palette...

Andrew
 
Hi, I agree with apepp and add this:

jpeg compression affects the image (with more or less damages), LZH compression affects the file only, but some softwares cannot read it

when you flatten your file, everything on it is "congealed", for example texts don't rely on fonts installed but are just pixels; same for the style, aso

in some cases, when you flatten your image some changes may occur. In this case, you can try <Merge visible> as a first step

Hope it helps, and good job
 
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