What does resolution measure in a digital image?

What does resolution measure in a digital image?

• A. The number of colors
• B. The frame rate
• C. The number of pixels per unit of measurement
• D. The file size

Answer: (C)

Resolution measures how much detail an image has by describing how many pixels are packed into a defined area. More pixels per inch (or per centimeter) means finer detail, so increasing the density of pixels in the same space makes the image look sharper. On screens this is often thought of in terms of the total pixel dimensions (width by height), while for printing it’s about how many pixels fit into an inch or centimeter. The other aspects—color depth (how many colors can be shown), frame rate (how many frames update per second in video), and file size (how much data the image file contains)—are different ideas and don’t define resolution. So resolution is about the number of pixels per unit of measurement.

Resolution measures how much detail an image has by describing how many pixels are packed into a defined area. More pixels per inch (or per centimeter) means finer detail, so increasing the density of pixels in the same space makes the image look sharper. On screens this is often thought of in terms of the total pixel dimensions (width by height), while for printing it’s about how many pixels fit into an inch or centimeter. The other aspects—color depth (how many colors can be shown), frame rate (how many frames update per second in video), and file size (how much data the image file contains)—are different ideas and don’t define resolution. So resolution is about the number of pixels per unit of measurement.