Umbrella term that describes the detail an image holds. Resolution quantifies how close lines can be to each other and still be visibly resolved. The term applies to raster digital images, film images, and other types of images. Higher resolution means more image detail. Image resolution can be measured in various ways. Resolution units can be tied to physical sizes (e.g., lines per mm, lines per inch), to the overall size of a picture (e.g., lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtenant.