Which term is used to describe the ratio that indicates how the width of a pixel compares to its height in a digital image?

• A. Color Depth
• B. Aspect Ratio
• C. Pixel Aspect Ratio
• D. Resolution

Answer: (C)

Pixel Aspect Ratio describes the width-to-height proportion of a single pixel. If pixels are square, the ratio is 1:1. Some video formats use rectangular pixels, so the pixel aspect ratio isn’t 1:1 and affects how the final image is displayed to achieve the intended display aspect ratio. By contrast, the overall image’s proportions are given by the Aspect Ratio, the total number of pixels is the Resolution, and Color Depth refers to how many bits store color information per pixel. So the term for how wide a pixel is relative to its height is Pixel Aspect Ratio.