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[filmscanners] Re: TIFF file sizes



Julian

I think the file size is smaller as I have cropped into the image.  Thanks
for doing the maths!

Simon

----- Original Message -----
From: "Julian Vrieslander" <julianv@mindspring.com>
To: <simon@sclamb.com>
Sent: Friday, April 26, 2002 12:07 PM
Subject: [filmscanners] Re: TIFF file sizes


> On 4/26/02 6:08 AM, "Simon Lamb" <simon@sclamb.com> wrote:
>
> > My mind has gone to mush and I cannot work out the following:
> >
> > I scan a 6X6 frame at 4000ppi and select 48-bit output in Silverfast.  I
> > assume the file size will be:
> >
> > (((2.25x4000)x(2.25x4000))x3)/1024 = 237Mb
> >
> > However, I am getting a file size of 406Mb.  Where is my calculation
wrong?
>
> I think you forgot a factor of two, to allow for two bytes per color per
> pixel.
>
> Also, assuming that 6x6 refers to centimeters, 6 cm is about 2.36 in.
>
> (((2.36x4000)x(2.36x4000))x3x2)/1024 = 522MB
>
> Maybe the real file size is smaller because you have compression turned
on.
>
> --
> Julian Vrieslander <julianv@mindspring.com>
>
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