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Sharpness has very little to do with image quality, and resolution has little to do with sharpness. Resolution (pixel count) has nothing to do with picture quality. Color and tone are far more important technically.
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That's not much of a difference, is it? That's the whole point of this article. I'll explain that a little further down.
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Pixel Count, expressed as Megapixels, is simply multiplying the number of horizontal pixels by the number of vertical pixels. It's exactly like calculating area.
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they now accept digital images, but with a catch: they have to be at least 300 DPI at 12x18," or 20 MP. They say an 8MP camera is OK, but you'll notice that you have to supply 12x18" at 300 DPI, which is 3,600 x 5,400 pixels, or 20 MP.
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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 area or square footage. It only takes a 40% increase in linear dimensions to double the pixel count! Doubling pixel count only increases the real, linear resolution by 40%, which is pretty much invisible.
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marcell marsOne needs about a doubling of linear resolution or film size to make an obvious improvement. This is the same as a quadrupling of 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 men always want a single number by which something's goodness can be judged.-
One needs about a doubling of linear resolution or film size to make an obvious improvement. This is the same as a quadrupling of 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 men always want a single number by which something's goodness can be judged.
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28 Dec 07
D. CooteyNicely detailed explanation why megapixel mania is bunk.
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Tommaso BaldovinoArticolo che spiega la verità sui megapixel e sulla differenza tra fotocamere
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27 Dec 07
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Marshall PreddyYour giant megapixel cameras aren't that great. But you knew that already.
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Gordon HerdArticle about digital cameras
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04 Aug 06
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Kevin LimGet your mega-pixels right and learn why buying a higher-resolution camera doesn't always make that big a difference.
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03 Aug 06
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paul reid" Forget the silly debate over pixel counts among digital cameras. There is little visible difference between cameras with seemingly different ratings. For instance, a 3 MP camera pretty much looks the same as a 6 MP camera, even when blown up to 12 x 18!
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