What is the relationship between pixels and file size?

Pixels are directly proportional to file size. The more pixels, the larger the file.

Digital images are generally stored in pixels, and each pixel is the smallest unit in a digital image. The larger the pixels, the larger the image area.

To increase the area of ??a picture, if no more light enters the photosensitive device, the only way is to increase the area of ??the pixels. This may affect the sharpness and clarity of the picture. . Therefore, when the pixel area remains unchanged, the camera can obtain the largest picture pixel, which is the effective pixel.

Extended information

The image quality of a camera is partly determined by pixels. If it is larger than a certain size, it is meaningless to simply compare pixels. Currently, the mainstream SLR camera has 10 million pixels. Around 5 million pixels are sufficient for ordinary photography and home use because the resolution of the monitor used is limited, generally 1024×768 to 1920×1200.

Image quality mainly depends on the camera lens, the size and quality of the sensor. The larger the pixels, the larger the resolution of the photo and the larger the printable size. However, early cameras were less than 1 million pixels. Starting from the second half of 1999, 2-megapixel products have gradually become the mainstream of the market, and now mobile phones generally have 5-megapixels.