What does resolution refer to in the context of images?

Resolution in the context of images refers to the number of pixels in an image or display. It defines how much detail the image holds; a higher resolution indicates more pixels, which typically results in a sharper, clearer image.

Resolution is commonly measured in terms of width and height, such as 1920x1080 pixels, meaning that the image has 1920 pixels horizontally and 1080 pixels vertically. This directly impacts the quality of the visual experience because more pixels can represent finer details.

While color depth, file size, and brightness are important attributes of images, they do not define resolution. Color depth relates to how many colors can be displayed and is important for color quality, file size refers to how much data an image file consumes on disk, and brightness deals with the lightness or darkness of the image. Each of these factors contributes to the overall quality of an image but does not determine its resolution.