offset/width?

On Thu, Apr 28, 2011 at 2:26 PM, John RA Benson <
[email protected]> wrote:

> While we're on the subject of cameras and a little matrix math -
>
> does anyone have the math for converting pixel values of the offset of a
> filmback into the window u value for the camera?
>
> Say I want to offset the image by 15 pixels, I'd need to adjust the window
> u by ... ?
>
> thanks!
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