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[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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