Resolution isn't coverage of an area, it's linear

Started Apr 9, 2014 | Discussions thread
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RichRMA
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Resolution isn't coverage of an area, it's linear
Apr 9, 2014

A lot of people seem to equate double the resolution with doubling the pixel count.  It doesn't work that way.  Want to double the resolution (resolve detail twice as small) with a camera?  You have to double the pixel count in both x and y dimensions.  So, if the camera has a 3000x2000 pixel array (6 megapixels), you need 6000x4000 or 24 megapixels to double resolution.  To double that, you need 12000x8000 (96 megapixels).  So, it's four times the pixels that allows doubling resolution.  That is why (when you really look at an image) resolution gains going from say 24mp to 36mp are really not that impressive.

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