# Re: Calculating Scan Size

From: patrick kelley ^lt;patrick@chronopsis.com>
Date: 02/20/04-01:21:34 PM Z
Message-id: <FEDCDDB2-63D9-11D8-BE57-000A95A71D32@chronopsis.com>

oops - left out two more (important) divisions.

1024 bytes per kilobyte; 1024 kilobytes per megabyte:

9,450,000 / 1024 =9228.5 kilobytes
9228.5 / 1024 = 9.01 megabytes

-p
On Feb 20, 2004, at 1:11 PM, patrick kelley wrote:

> part of the problem is the need to incorporate color depth as well.
>
> a 5 x 7 inch, 300 dpi scan equates to 3,150,000 total pixels.
>
> if it is 24-bit color:
>
> 3,150,000 * 24 = 75,600,000
>
> and then, as there are 8 bits in a 'byte': 75,600,000 divided by 8:
>
> = 9,450,000 or about 9.4 megabytes.
>
> pat kelley
>
> -----------
> patrick kelley
> assistant professor
> department of art
> st. olaf college
>
> http://www.chronopsis.com
> http://www.patrickkelley.org
>
> On Feb 20, 2004, at 12:41 PM, Sandy King wrote:
>
>> I know there must be a fairly simple way to figure out the total size
>> of a file in mb based on scan resolution and size in inches but when
>> I do the calcuation the way I think it should work it never agrees
>> with the size of the actual scan.
>>
>> So how is the calculation made?
>>
>> Sandy King
>>
>
Received on Fri Feb 20 13:21:47 2004

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