Understanding Computer Graphics and Pixels

• Computer graphics involves the use of computers to generate visuals such as images and graphics.
• Computer graphics facilitate the creation of animals in movies, removing the need for real animals.
• A picture element (pixel) represents the smallest addressable unit in a display image.
• A pixel is indivisible while maintaining its function.
• An image comprises numerous pixels.
• Resolution is expressed as width x height (e.g., 1920 x 1080).
• In a resolution of 1920 x 1080, the width contains 1920 pixels, and the height contains 1080 pixels.
• Pixels per inch (PPI) specifies the pixel density within one inch of a display.
• Calculating PPI requires the diagonal size of the display in inches and the resolution.
• The diagonal size is measured from one corner to the opposite corner of the screen.
• The Pythagorean theorem is used to calculate the number of pixels along the diagonal.
• PPI is determined by dividing the number of pixels on the diagonal by the diagonal size in inches.
• For instance, a phone with a resolution of 1920x1080 and a 5-inch diagonal has a PPI of approximately 440.

Aspect Ratio

• Aspect ratio is the ratio of horizontal to vertical pixels.
• Aspect ratio = width / height
• An equal width and height results in a 1:1 aspect ratio.
• Common aspect ratios are 4:3 and 16:9.

Frame Buffer

• A frame buffer is a dedicated memory area storing information for display.
• It holds all the information necessary to render images on the screen.