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What is Megapixel
Pixels are small squares that are put together like pieces of a puzzle or mosaic to create a digital canvas. Image resolution is usually determined by the amount of pixels it packs together in a space. Higher pixel count results in better resolution. For easy classification, the pixels are also measured in megapixel format, which basically means one million pixels.
Counted per inch, pixels and megapixels determine the digital image resolution. For example, a 12-megapixel camera sensor can produce images with 12 million pixels per inch (PPI). Similarly, an 8MP camera sensor can produce images with eight million PPI. The 12MP sensor squeeze in more megapixels per inch, therefore, produces sharper images compared to an 8MP sensor. Image quality, however, is not determined only by the megapixel count. Colour array, light sensitivity and detail optimisations are some other parameters that determines image quality.
The megapixels, however, matters most when zooming in or cropping a photo. For example, the current breed of 108MP smartphone camera sensor from Samsung can capture more details compared to its 16MP camera sensor. These details come to notice when you zoom in on any visible element on the image.
Higher the megapixel count, larger is the file size. Instead of using image compression to reduce image size, companies now use pixel binning technology. In this technology, pixels are combined to form a bigger pixel size, which brings down the effective megapixel number and reduces the size of an image without any visible quality loss. Usually, a 4-in-1 pixel binning technology is used in smartphones that put together four pixels to form one pixel.
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