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#1 David Muir

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Posted 28 February 2007 - 10:23 PM


Calculate the storage requirements for:

(1) A 1 inch X 2 inch image at 200 dpi in true colour

(2) An image 160 X 102 pixels in size, in greyscale


Could you please supply working....

#2 d2vid

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Posted 30 March 2007 - 09:28 AM

1) 1 x 2 x 200 x 200 x 24 = 1920000 bits => 240000 bytes = 234 kB

2) 160 x 102 x the number of bits in greyscale (not sure just now) => do the same calculation as above..
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#3 Rapidfire

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Posted 31 May 2009 - 08:25 PM

1. 1 x 2 = 2 square inches
200 x 200 = 40000 dots per square inch
2 x 40000 = 80000 pixels
80000 x 24 = 1920000 bits
1920000 / 8 = 240000 bytes
240000 / 1024 = 234.38 KB

2. 160 x 102 = 16320 pixels
16320 x 8 = 130560 bits
130560 / 8 = 16320 bytes
16320 / 1024 = 15.93 KB





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