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[OM] Scanner vs. E-10

Subject: [OM] Scanner vs. E-10
From: Jez.Cunningham@xxxxxxxxxx
Date: Mon, 16 Jul 2001 15:43:57 +0200

Tom - it's worth saying it again, but pixel counting is hijacked by digital 
camera marketing brochures!  For digital cameras they count the total number of 
photosensitive cells in the CCD - and they are in groups of 4 with one for red, 
two for green and
one for blue.  (Don't ask me why - the answer is on the web - somewhere!).  For 
scanners we count one pixel as being able to represent any colour.  So when you 
think about a 4megapixel camera compare it to a 16megapixel scan...

For a better explanation and loads of experimental examples, see:  
http://www.users.qwest.net/~rnclark/scandetail.htm

   And to quote directly from this site: "Film is scanned with each pixel have 
a red, green and blue value, so the 3260 x 4472 pixel scan of the 35mm film is 
14.6
   megapixels. But these are not the same as the pixels in a digital camera. In 
a digital camera, each pixel is ony a red, or a green, or a blue pixel. Digital 
cameras have 50 0reen, 25% blue and 25% red pixels (thus called RGBG). So a 1 
megapixel digital
   camera has 1 million red + green + blue pixels. Thus, the 35mm scan has 14.6 
* 3 pixels or 43.8 megapixels in digital camera equivalent pixels. "

So, do we have to buy an E-10 yet?  Yes, for fun, but keep the OM and the 
scanner for serious stuff!
best regds
jez



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