On "image quality" and "image size"
A digital image is made up of a collection of small dots called pixels.
If it contains a large number of pixels, the image becomes large, it takes up more memory,
and the image is displayed in fine detail. "Image size" is shown by the number of pixels.
Although you cannot see the differences on the screen of the camera, the fine detail and data
processing time differ when the image is printed or displayed on a computer screen.
Description of the pixels and the image size
Image size: 12M
4128 pixels × 3096 pixels = 12,780,288 pixels
Image size: 2M
1920 pixels × 1080 pixels = 2,073,600 pixels
(Fine image quality and large file size)
(Rough image quality but small file size)