File Size Puzzle: PS CS vs File Info??

T
Posted By
tonycmac
Apr 23, 2004
Views
368
Replies
2
Status
Closed
I am seeing a difference between what PS CS’ Document Size shows as a file size and what the Macintosh Finder Get Info shows for a flatten ..psd file. Why would there be a difference?

It happens after I have increased the flatten file by Resampling (Bicubic) the ppi.

Example:

I resample the file from 360 to 720 ppi.
The Documet Size box shows 288/288MB – but Get Info and the Finder say the file is 159MB.

This is with a flattened file. In PS CS preferences, Max PSD compatibility is unchecked – though this shouldn’t matter with a flattened file.

This occurs in PS 7 & CS; under Mac OS 9 and X.

Thanks for your help!
EG
Eric Gill
Apr 23, 2004
"Tony Cortizas, Jr." wrote in news:tonycmac-
:

I am seeing a difference between what PS CS’ Document Size shows as a file size and what the Macintosh Finder Get Info shows for a flatten .psd file. Why would there be a difference?

Compression. PSD uses a lossless compression scheme.

Why the mystery?

<snip>
T
tacitr
Apr 23, 2004
I am seeing a difference between what PS CS’ Document Size shows as a file size and what the Macintosh Finder Get Info shows for a flatten .psd file. Why would there be a difference?

Because a .psd file is compressed using RLE (Run Length Encoding).


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