What is a pixel?

Pixels are made up of small squares of an image, which have definite positions and assigned color values. The color and position of the small squares determine the appearance of the image.

Pixels can be regarded as indivisible units or elements in the whole image. Indivisible means that it cannot be divided into smaller units or elements. It exists in a single color cell. Each dot matrix image contains a certain number of pixels, which determine the size of the image on the screen.

Application field of pixels

Pixel is the most important index to measure a digital camera. Pixel refers to the resolution of a digital camera. Depending on the number of photosensitive elements on the photoelectric sensor in the camera, one photosensitive element corresponds to one pixel. Therefore, the larger the pixel, the more photosensitive elements, and the greater the corresponding cost.

The image quality of a digital camera is partly determined by pixels. When they are larger than a certain size, it is meaningless to simply compare them with pixels. The pixels of mainstream SLR digital cameras are around10 million, but 5 million pixels are enough for ordinary photography and home use, because the resolution of the display we use is limited.