Resolution

Resolution is expressed in terms of number of pixels on the horizontal axis to the number on the vertical axis.

• It refers to the sharpness and clarity of the image.
• Images are array of pixels in rows and columns.
• Resolution means amount of pixels contained in the image.

Pixel width x Pixel height

Changes in the pixels

It is same for still images and video on digital screens.

• A given computer display system will have a maximum resolution that depends on its physical ability.
• You are not likely to notice the difference until you come close to the screen.

  

When you mention has 1080p it means :

• 1080 = No.of horizontal pixels.
• p = Stands for progressive scan.

Examples for Resolution :