The true size of megapixels
What is the true size of the megapixels?
Some of you may remember one of my past articles called "Will a resolution increase ..." where I expressed my dilemma about buying a new better camera.
Well, I looked into the problem a little bit further and I came up with a bit of a conspiracy theory regarding the megapixels race which I think it's a myth in some aspects.
This gimmick is used by manufacturers to make you feel as if your current camera is inadequate and needs to be replaced even if the new cameras coming into the market each year are only slightly better.
Small differences in pixel count, between say 5 MP and 8MP, are unimportant because pixel counts are a square function. It's exactly like calculating the area. It only takes a 40% increase in linear dimensions to double the pixel count! Doubling pixel the count only increases the real, linear resolution by 40%, which is pretty much invisible.
One needs at least a doubling of linear resolution to make an obvious improvement. This is the same as quadrupling the megapixels. A simple doubling of megapixels, even if all else remained the same, is very subtle. The factors that matter, like color and sharpening algorithms, are far more significant.
The megapixel myth is also prevalent because humans always want a single number by which something's goodness can be judged.
Unfortunately, it's all a myth because the number of megapixels (MP) a camera has, has very little to do with how the image looks. Even worse, plenty of lower MP cameras can make better images than poorer cameras with more MP.
Photo credits: Andra Mohorea.
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