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How to Calculate a Camera's Resolution through its Pixel Count

If you only know the pixel count (i.e. the number of megapixels) that a digital camera has, it's simple to calculate the linear resolution from it (i.e. the width and height of the resulting images) if you know the camera's aspect ratio. We're going to be using an imaginary 12-megapixel digital SLR with a 3:2 aspect ratio in our examples.

Multiply With Megapixel * 1000000
Like: 12MP * 1000000 = 12000000

3:2, or 3 horizontal pixels for each 2 vertical pixels, is typical for digital SLRs.

Convert your megapixel count to a total pixel count by multiplying it by 1 million, if necessary.

3/2 = 1.5
2/3 = 0.666

Get a horizontal-to-vertical and vertical-to-horizontal ratio. You get the horizontal-to-vertical ratio by dividing the first part of your aspect ratio by the second; you get the vertical-to-horizontal ratio by dividing the second part of your aspect ratio by the third. In our 3:2 digital example:

12000000*1.5 =18000000
12000000*0.666 = 8000000

Multiply your pixel count by the horizontal-to-vertical ratio, then separately, by your vertical-to-horizontal ratio.

Take the square root of your resulting numbers.

You now have the resolution of the camera. In the case of our imaginary digital SLR, it was

4243 x 2828

Thanks for Watching This and hope you like this video if you like it then please.

Deepak Jha
[email protected]
@technocares

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