Digital BW, The Print

Anyone noticed that when saving a file as a jpeg in PS CS2 for Mac that the file size estimate 
(which is given to TWO DECIMAL PLACES) is miles off.   For example, I saved a 600x480 pixel 
image at setting 6.  The estimated file size was 131.75K.  The actual file size was 225K 
according to Bridge and 228K according to Finder.

Well it does say "estimated" not "actual". Like getting an estimate  
for car repair :)
Mark

On Nov 18, 2005, at 7:08 AM, Steve Kale wrote:

> Anyone noticed that when saving a file as a jpeg in PS CS2 for Mac  
> that the file size estimate
> (which is given to TWO DECIMAL PLACES) is miles off.   For example,  
> I saved a 600x480 pixel
> image at setting 6.  The estimated file size was 131.75K.  The  
> actual file size was 225K
> according to Bridge and 228K according to Finder.
>
>



[Non-text portions of this message have been removed]

Quoted to two decimal places and wrong by a factor of almost 2?  Nah
something's wrong here...

> From: Mark Savoia <mark@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Fri, 18 Nov 2005 07:14:46 -0500
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] PS CS2 Mac JPEG size estimate grossly wrong
> 
> Well it does say "estimated" not "actual". Like getting an estimate
> for car repair :)
> Mark
> 
> On Nov 18, 2005, at 7:08 AM, Steve Kale wrote:
> 
>> Anyone noticed that when saving a file as a jpeg in PS CS2 for Mac
>> that the file size estimate
>> (which is given to TWO DECIMAL PLACES) is miles off.   For example,
>> I saved a 600x480 pixel
>> image at setting 6.  The estimated file size was 131.75K.  The
>> actual file size was 225K
>> according to Bridge and 228K according to Finder.
>> 
>> 
> 
>

Are you saving with profile?

Best regards,
John Moody

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of Steve Kale
Sent: Friday, November 18, 2005 7:26 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] PS CS2 Mac JPEG size estimate grossly wrong

Quoted to two decimal places and wrong by a factor of almost 2?  Nah
something's wrong here...




[Non-text portions of this message have been removed]

I didn't know there was a choice.  The psd and resultant jpeg files are
tagged with sRGB.  I am using Baseline Optimized (whatever that is).

I am trying to get Adobe's Flash Gallery page to work well.  I have a couple
of problems.  I need to get the file sizes down and hence I stumbled across
this issue with saving to jpeg.  I'd also like the entire page info to be
loaded open opening of the page so that the transitions between images work
properly.  (I have no idea how to edit Flash/HTML.)  At the moment I am
getting a left to right swipe with an increasing % number in the bottom
right between images.  I'm not sure what the problem is here as the
transitions take a lot longer than what the file size and my broadband speed
would suggest, even if each image was (down)loaded individually on
transition.

> From: John Moody <moodymz3@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Fri, 18 Nov 2005 07:58:58 -0500
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: RE: [Digital BW] PS CS2 Mac JPEG size estimate grossly wrong
> 
> Are you saving with profile?
> 
> Best regards,
> John Moody
>

Make sure you uncheck the Save Icon and Save Preview Image checkboxes.


On 11/18/05 8:37 AM, "DigitalBlackandWhiteThePrint@yahoogroups.com"
<DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:

> Subject: PS CS2 Mac JPEG size estimate grossly wrong
> 
> Anyone noticed that when saving a file as a jpeg in PS CS2 for Mac that the
> file size estimate
> (which is given to TWO DECIMAL PLACES) is miles off.   For example, I saved a
> 600x480 pixel 
> image at setting 6.  The estimated file size was 131.75K.  The actual file
> size was 225K 
> according to Bridge and 228K according to Finder.

Where are those?  I see no such boxes.  The only thing I can (now) see of
relevance is to toggle whether the profile is included or not.  At any rate,
whether they are in or not, surely the size and time estimates would take
notice of such?

> From: James Parker <dakota.kid@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Fri, 18 Nov 2005 11:17:30 -0500
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: [Digital BW] Re: PS CS2 Mac JPEG size estimate grossly wrong
> 
> Make sure you uncheck the Save Icon and Save Preview Image checkboxes.
> 
> 
> On 11/18/05 8:37 AM, "DigitalBlackandWhiteThePrint@yahoogroups.com"
> <DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:
> 
>> Subject: PS CS2 Mac JPEG size estimate grossly wrong
>> 
>> Anyone noticed that when saving a file as a jpeg in PS CS2 for Mac that the
>> file size estimate
>> (which is given to TWO DECIMAL PLACES) is miles off.   For example, I saved a
>> 600x480 pixel 
>> image at setting 6.  The estimated file size was 131.75K.  The actual file
>> size was 225K 
>> according to Bridge and 228K according to Finder.

You have to change your preferences in Photoshop's preference dialog --

Go to File>Prefs>FileHandling and turn ON Image Previews -- Ask When Saving.
If this is set to Never, you won't see the option when you SaveAs... The
image preview is what jumps the file size, especially with a small image.

If you have your prefs set to save all of the icons, previews and a profile,
it will add size to a file. Since these addons are generally about the same
number of bytes regardless of the size of the file, you'll see a bigger jump
in size on a smaller file, proportionally.

I tested this informally on a Mac, with an 8Mb file reduced to a JPEG. With
no profile and no image previews of any sort, at JPEG 11, it registered
1.203Mb in the PS dialog box, and 1.248 actual as measured in the Info box.

The same file, with a profile and all the image previews, including Full
Size, was 1.337Mb, about 110Kb more. The time estimate doesn't account for
the additional data, only the data in the JPEG file itself.

Using Save for Web, and optimizing for a file size of 1203 to roughly match
the same level of compression yielded a slightly smaller file, about
1.150Mb. 

Note that Save for Web does not preserve the IPTC data, but Save As does.
This is due to the fact that Save for the Web is usually used to slice
images, and to get the file size as low as possible. This is by design, I
believe.

HTH

Jim

-- 
parkerparker :: design | photography
http://www.parkerparker.net





On 11/19/05 9:41 AM, "DigitalBlackandWhiteThePrint@yahoogroups.com"
<DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:

> Subject: Re: Re: PS CS2 Mac JPEG size estimate grossly wrong
> 
> Where are those?  I see no such boxes.  The only thing I can (now) see of
> relevance is to toggle whether the profile is included or not.  At any rate,
> whether they are in or not, surely the size and time estimates would take
> notice of such?

Ian Lyons confirmed to me that this issue is an Adobe known bug in PS CS2.