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How large is a pixel?

And I want to know the length of the sides relative to inches... I need fractional values if you wouldn't mind.

Update:

Sorry I wasn't more specific earlier... is there a metric conversion to any of your answers?

Update 2:

What equations where you using to find the area of the pixels based on the sensors? For example, how do you know that a Sensor size = 7.40 x 5.55 mm, Pixel size = 0.41 cm²

6 Answers

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  • 1 decade ago
    Favorite Answer

    The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. Think of it as a logical - rather than a physical - unit. The physical size of a pixel depends on how you've set the resolution for the display screen. If you've set the display to its maximum resolution, the physical size of a pixel will equal the physical size of the dot pitch (let's just call it the dot size) of the display. If, however, you've set the resolution to something less than the maximum resolution, a pixel will be larger than the physical size of the screen's dot (that is, a pixel will use more than one dot).

  • 1 decade ago

    Pixels have no native size. Photo sites on digital camera sensors, often referred to as pixels, DO have a native size, but those are not exactly the same as pixels on a digital file.

    Pixel size CAN determined within an individual photo, however. It is simply a matter of resolution. A 300ppi (pixels per inch) photo has pixels that are 1/300th of an inch wide. A 240ppi photo has pixels that are 1/240th of an inch wide. Not matter how large or small the photo, image resolution is the sole determinate of pixel size.

    So, an image file that is 72ppi has larger pixels than one at 300ppi, not matter what the sizes of the individual photos.

  • otwell
    Lv 4
    4 years ago

    How Wide Is A Pixel

  • Anonymous
    1 decade ago

    The actual size of a pixel depends on the way the manufacture built the chip, assuming we are talking on camera's pixels... Pixels on chips are measured in the MICRON size, very, very small, where 1 micron is 0.00004 inch and many cameras have pixels in the 4 to 5 micron size range.

    http://en.wikipedia.org/wiki/Micrometre

    Pixels on your TV or computer monitor are much larger. These can be seen by looking real close or flick a few water drops on the screen and you can see them. These ARE measured in so many dots per inch and about the ONLY place where DPI can be used in computers and images. The more pixels on a TV per inch, the sharper the image.

    DPI or - Dots Per Inch and Pixels have NOTHING in common and do not translate back or forth. Read - The DPI Myth below

    http://www.rideau-info.com/photos/mythdpi.html

    Bob - Tucson

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  • Anonymous
    1 decade ago

    There is no general conversion factor. With a printer, it's called the DPI (dots per inch). If the printer is 72 DPI, then a pixel is 1/72 of an inch. If a printer is 300 DPI, then a pixel is 1/300 of an inch. It gets even more complicated if we talk about pixels on a camera. Are you talking about inches on the sensor, or apparent inches in the actual image?

  • 5 years ago

    Sounds cool

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