Resolution in photography is simply the amount of detail in an image. Digital photos use a unit of measurement called Pixels per inch or ppi. In contrast, you may also hear the term Dots Per Inch or DPI, which is the unit of measurement used for printing.
How Does Resolution Affect Image Quality? Generally speaking, the higher the resolution the more detail and texture you’ll find in the image.
How Does Resolution Affect File Size? The higher the resolution, the larger the file size.
How Does Resolution Affect Image Size and Cropping? Resolution determines how large you can print a photo before it becomes pixelated, i.e. blurry, grainy, or low quality.
How do we measure resolution? Simply multiply the width and the height. For example, if the resolution of a camera is 3904×2598 (WxH) pixels, the resolution is 10,142,592 pixels or 10.1 megapixels.