CS3 actions question

i am trying to create an action (in CS3) which would trim an image on all
sides by X pixels.
i naively tried doing it using canvas size. i started recording on a sample
image, reduced image height and width by 2X pixels (X pixels on each side)
and that was fine.

however, things fall apart when i try to use it on an image of different
dimensions, because actions recorded absolute dimensions i used to trim the
canvas of sample image, and not just the relative change (of X pixels).

i need to use this on large number of differently sized images, and since
i'm preparing those images for detailed image analysis and measurements in
matlab later on, precision is crucial.

any ideas on how to properly record the action to save me hours of manual
labor?

thanks!

blushark <SPAMfree DeleteThis @email.com> wrote:

> i am trying to create an action (in CS3) which would trim an image on all
> sides by X pixels.
> i naively tried doing it using canvas size. i started recording on a sample
> image, reduced image height and width by 2X pixels (X pixels on each side)
> and that was fine.
>
> however, things fall apart when i try to use it on an image of different
> dimensions, because actions recorded absolute dimensions i used to trim the
> canvas of sample image, and not just the relative change (of X pixels).
>
> i need to use this on large number of differently sized images, and since
> i'm preparing those images for detailed image analysis and measurements in
> matlab later on, precision is crucial.
>
> any ideas on how to properly record the action to save me hours of manual
> labor?

In Canvas Size, check 'Relative' and then fill in the pixels you want to
crop off as a negative value.


--
Johan W. Elzenga johan<<at>>johanfoto.nl
Editor / Photographer http://www.johanfoto.com