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P doesn't display file sizes the way I want

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Sun, 14 March 2010 11:45 Go to next message
Robert Montgomery (Advanced Photoshop user)
When I type my file sizes, rounded off to the nearest one-sixteenth of
an inch, Photoshop computes and displays the sizes to the nearest
one-thousandth of an inch.

For example, if I make an image 11 by 41.5 inches in Image > Image Size,
the sizes change automatically to "11.001" and "41.499".

How can I get the file sizes to remain the sizes that I type them?

I'm using CS3.

Robert
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Sun, 14 March 2010 18:41 Go to previous messageGo to next message
N[3] (Photoshop begginer)
"Robert Montgomery" <info-block@northern-data-tech.net> wrote in message
news:gw7nn.70988$PH1.48640@edtnps82...
> When I type my file sizes, rounded off to the nearest one-sixteenth of an
> inch, Photoshop computes and displays the sizes to the nearest
> one-thousandth of an inch.
>
> For example, if I make an image 11 by 41.5 inches in Image > Image Size,
> the sizes change automatically to "11.001" and "41.499".
>
> How can I get the file sizes to remain the sizes that I type them?
>
> I'm using CS3.
>
> Robert

That's because of floating point arithmetic.

http://en.wikipedia.org/wiki/Floating_point



--
N
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Sun, 14 March 2010 20:30 Go to previous messageGo to next message
Mike Russell (Photoshop expert)
On Sun, 14 Mar 2010 15:45:16 GMT, Robert Montgomery wrote:

> When I type my file sizes, rounded off to the nearest one-sixteenth of
> an inch, Photoshop computes and displays the sizes to the nearest
> one-thousandth of an inch.
>
> For example, if I make an image 11 by 41.5 inches in Image > Image Size,
> the sizes change automatically to "11.001" and "41.499".
>
> How can I get the file sizes to remain the sizes that I type them?
>
> I'm using CS3.
>
> Robert

This limitation is due to the size of the pixels. Normally I would just
ignore the difference. If you need it to be exact for some reason, make
sure the Resample box is checked.
--
Mike Russell - http://www.curvemeister.com
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Sun, 14 March 2010 21:27 Go to previous messageGo to next message
Rainer Latka (Advanced Photoshop user)
On 14.Mar.10 16:45h, Robert Montgomery wrote:
> When I type my file sizes, rounded off to the nearest one-sixteenth of
> an inch, Photoshop computes and displays the sizes to the nearest
> one-thousandth of an inch.
>
> For example, if I make an image 11 by 41.5 inches in Image > Image Size,
> the sizes change automatically to "11.001" and "41.499".

i.e. you are using Image > Image Size for downscaling the image?

> How can I get the file sizes to remain the sizes that I type them?

by making sure the original lengths measured in px are divisible by 16

>
> I'm using CS3.

that's probably irrelevant

>
> Robert
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Mon, 29 March 2010 22:10 Go to previous message
Robert Montgomery (Advanced Photoshop user)
Rainer Latka wrote:
> On 14.Mar.10 16:45h, Robert Montgomery wrote:
>> When I type my file sizes, rounded off to the nearest one-sixteenth of
>> an inch, Photoshop computes and displays the sizes to the nearest
>> one-thousandth of an inch.
>>
>> For example, if I make an image 11 by 41.5 inches in Image > Image Size,
>> the sizes change automatically to "11.001" and "41.499".
>
> i.e. you are using Image > Image Size for downscaling the image?
>
>> How can I get the file sizes to remain the sizes that I type them?
>
> by making sure the original lengths measured in px are divisible by 16

Thanks, Rainer, Mike and N.

It's easier for me just try to ignore the problem than to make the
original lengths measured in px divisible by 16, which would be adding
considerably to the problem rather than reducing or eliminating it.

Robert.
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