Why Are Higher Megapixels in Cellphone Cameras Better?

Why Are Higher Megapixels in Cellphone Cameras Better?

Cellphones with high megapixel cameras allow photographers to print larger photos and crop images without noticing a loss of quality. While computers monitors often only need between 1 and 3 megapixels for optimal appearance, a 14-by-11-inch printed photo requires at least a 7-megapixel image to look its best, or higher if the image needs cropping. Since megapixels are only one facet in determining a camera's overall quality, some lower megapixel cameras can also produce pictures with excellent quality.

When a camera produces a high megapixel image, the quality of the image can suffer if the sensor is too small or a low quality. This occurs because each pixel space is smaller and captures less light. As a result, off-color pixels from electronic noise appear on the image because the sensor compensates by becoming more sensitive to light. A camera with high-quality image processing capabilities can mitigate this problem to a degree.

A megapixel is a measurement in which each unit is 1 million pixels, which are the square dots that comprise a digital image. A 5-megapixel camera produces images containing 5 million pixels. The megapixels of an image are calculated by multiplying its dimensions. For example, a 2000-by-1000-pixel image is exactly two megapixels.