what is megapixel? || Do more megapixels means better photo quality?

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What is mega pixel?
A. A single megapixel amounts to exactly one million pixels in an image. These pixels are placed at image sensor, vertically and horizontally. If you count pixels in image sensor, vertically and horizontally you will get one million pixels if your camera is one megapixel. The work of pixels is captureing details and it looks like small bots.
Do more megapixels means better photo quality?
A. No
Reason:
The number of megapixels is only one aspect relating to the quality of a camera or the actual quality of a picture it is capable to produceing.
Factors such as camera sensor size,pixel size,optical quality of a lens, aperture and image processing.
1.Camera sensor size:
The bigger the sensor size is better the quality of a picture. You can easily make this out by comparing pictures taken from DLSR/phone camera. If you compare both the pictures quality, picture taken in DSLR is better because camera sensor size is big.
2. Pixel size:
Pixel size is more important to get better picture. Taking further from the above points. When a small image sensor has to accommodate large amount of pixels, the pixel minimises, giving lesser absorbing, which in there deteriorates picture quality.
3.optical quality of a lens:
Quality of lens effects image quality to a large extent. Better lens quality produce finest of the images.
4.Aperture:
It allows the light rays to pixels. If your aperture size is f/2.8 then it allows less light.
If your aperture size is f/1.8 then it allows more light. It also effect the quality of the image captured.
5.image processing:
It is different from all devices. Image processing is a method to convert an image into digital form and perform some operations on it, in order to get an enhanced image or to extract some useful information from it. It is a type of signal dispensation in which input is image, like video frame or photograph and output may be image or characteristics associated with that image.

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